CALIFORNIA

GEOLOGYA PUBLICATION OF THE.

DEPARTMENT OF CONSERVATIONDIVISION OF MINES AND GEOLOGY

Stal. 01 Calitomia PETE WILSONGovernor

The Resoo'Cfi Agency DOUGLAS P. WHEELERSecrerary lor Resources

(lepanment 01 eonse",al.," eDWARD G. HEIDIGDJff~crOf

In This Issue IJAMESTOWN LEAF GOLD 63

GOLD - CALIFORNIA STATE MINERAL 66

THE GOLD BUG MINE 68

THE MINERAL INDUSTRY OF CALIFORNIA 74

LITERARY PROSPECTS 76

TEACHER FEATURE 80

PUBLICATIONS REQUEST FORM 81

CALIFORNIA GEOLOGY SUBSCRIPTION ANDCHANGE OF ADDRESS FORM 82

CALIFORNIA GEOLOGY

MAY/JUNE 1993Volume 461Number 3

CGEOA 46 (3) 61·84 (1993)

~ l-leaoqual18rs:80\ K Street.!zu, F""". MS 12-30sacrarnenlo. CA 950814·3531(916) 445·1825

Pybkillions a"" I"l"'mario<> Olha!801 K StrOO1, 14th FIooI', MS 14-33SaaarTll,lnlO. CA 95814·3532(9IG) 44S,S716

South&rn Cal~OfIlia Regoonal Ol1iat;107 South Br03d",ay, Room lC165Los Angelos. CAo 90012·4402(213) 620·3560

881 Alea Revoonal OItice'185 Berry SlrOOl, SUI1I13600. 3,d Fklo<San F,ancI!!a>, CA 94107(415) 904·7723

CALlFOflNIA GEQLOOY (ISSN 0026 4555) is publist>ed til·monl!lly by It>e Department 01 Cot\s&rIIallOO. DiYlSlOtl o! Mines_Geology. The Recotds 0fl1Ce is 3"0S9 Vine Strum, Suit..103. SacramenlO. CA 9S814 5ecorId class;>ostago 15 ~ld alsacramanlO. CA. POSlmaSler: Sand _'1155 change$IO CALI·FORNIA GEOLOGV (USPS 35(840). Bo. 2980. Sacramento.CA95812·2980

Repros conce,ning DMs>on 01 Mines and Geololl1 ptojeels,and artidots and rKIWS ~ams ralale<l to 1he aarlh sciences irlCalilomia. a'a inclUded In lha magaZJrKI. Cont'ibuted artidlts,pIIoIographs. rKIWS items. ancl geologlcal mael'''Il aMOUnce·mems ..... wek;ame.

THE CONCLUSIONS AND OPINIONS EXPRESSED INARTICLES ARE SOlELV THOSE OF THE AUTHORS ANDARE IoKIT NECESSARILY ENDORSED BV rHE DEPART·MENT OF CONSERVATION.

Co,,~ should be _,essed 10: Editor.CALIFORNIA GEOlOGV. 801 K Sl'....l. MS 14·33.Sacramento. CA 9S814·3532

SubscriPIlons: 110.0011 y,. (6 issoos). 119.0012 y's 112 is·sues): 528.0013 y's, \1 Bis&ues) Sand subScripIion orders andcnanoe 01 atld'lI55 irlIoo-mal.", 10 CAliFORNIA GEOlOGY,P O. Bo. 2980. S80'amerllo. CA 9S812·2980.

Technical Editors:

Copy Editor:Art Oi/octor,Publications Supervisor:

JAMES F. DAVISStare Geologist

Elise MattisonJohn BumanLena Tabllio

Peggy WalkerJet! Tamben

For more infOlTll3tion on the Workshop and Expedition below, contact:

Dr. Dorothy L. StoutCypress College

9200 Valley View SlreetCypress, CA 90630

'8' (714) 826-2220 FAX (714) 527-8238Email: dSlout@eis.calstate.edu

Cypress College

COMPUTER WORKSHOP

The National Science Foundation has awarded a grant to Cypress Collegefor a June 20 to July 7. 1993 workshop entitled Project Update Geoscience ­PUG. This highly intensive computer-aided learning workshop is for instruc­tors of college-level introductory geosciences courses. It will include lectures.tutorials. seminars, and hands-on laboratory exercises. In addition, there willbe a 3-day fiekltrip in the OvJens Valley to examine computer monitoring ofwater flow. earthquakes. and volcanoes.

SEMINAR EXPEDITION"Geology and Volcanology of the

Kamchatka Peninsula"

The National Association of Geology TeacheTS is offering this July 20 ­August 1, 1993 seminar expedition to Kamchatka Peninsula. This long-inac­cessible area forms part of the Circum-Pacific Ring of Are. and is home toover 200 spectacular volcanoes, about 30 of which are considered active.Seminars and field trips to these volcanoes will be led by members of theVolcanological Institute of Kamchatka.

Cover photo: Some or the Jameslown tear gold specimens. Theupper pan of the largest piece is speckled with tiny crystals of has·Site, a Silver lellunde. Crystals prepared by Knstal/e, Laguna Beach,California. Photo by Harold and Erica Van Pelt.

62 CALIFORNIA GEOLOGY MAY/JUNE 1993

JOHN L. BUANETI, GeologistDivision of MInes and Geology

On December 26. 1992. a largepocket of gold was discovered at theCrystalline-Alabama claim of theJamestown Mine. Tuolumne County.Operated by the Sonora Mining Corpora­tion. the Jamestown Mine is a consolida­tion of several older mines that includedthe Crystalline-Alabama claim as well asthe more famous Harvard Mine. Unlikeother large pockets of California gold. thisfind. named the "Christmas Pocket. M

isunique because the gokl crystallized in theform of bright. flattened ribbons ca1Ied

leaf gold. The ""'"'" '"'" "<lhtly "'""or. and about 50 feet (15 m) bebN. theok! Alabama glory hole. which was mined0Ye1 a hundred years ago. The entirepocket has now been mined.

The gold \lIas mined from a fault zoneseparating black graphitic slate from talcsericite schist. The find included severaldozen pieces. The largest weighs over 73troy pounds· (60 avoirdupois pounds or27 kg) and measures approximately 22by 13 inches (56 by 33 an) with an aver­age thickness of 3 inches (8 em). Thispiece has not yet been photographed.

Photos in this article show details ofsome pieces that have been treatedchemically only to remove extraneousvein material.

PhafOS in this article are byHarold and Erica Van Pel!.All gold specimens are fromfhe Jamestown Mine. Theywere prepared by Kristal/e.Laguna Beech, California. )

•The system of weights for preciOuS rnetMsoc:h as gold. silver. and platinum. One troypound (12 troy ounces or 373.2509 g)equals 0.82286 a\lOirdupois pound. thecustomary unit in lhe United States.

CALIFORNIA GEOLOGY MAYIJUNE 1993 "

(25-hectare) park provides a safe walkthrough a real mine (F"lgure 2). In additionto the tv.<> main adlts (GokI Bug andPriest mines). the park has an 8-stampmin used to reduce are to pc:y..vder anda third, undeveloped adit, the SilverPine Mine

Big Canyon Creek, which formedthe central valley of the park. was !irstprospected b-y Chilean miners in 1848.The returns must have been worthwhile.because the park has eighl adits and over250 prospecting holes. Trenches weredlJJ to locate additional quartz veins.

HISTORY

~L::s:s::£:!~~:PRIESTMINE

20

N ~_ r . '!' E

~o

Foet

A Field Trip to an Underground Gold Mine

INTRODUCTION

Placerville, EI Dorado County

JOHN l. BURNETT, GeologistDivision of Mines and Geology

The expeTience of going through a realmine cut into the bo.uels of the earth is onethat few win ever forget. Ught is unevenand fiDe:! With shacIc:JI.l.'S. The walls glistenIAlith groundwater. If the lights are turnedofLtotal darkness-the kind of blacknessfew of lIS have ever really known.

Hangtown's' GJld Bug Park has such amine from the 1860s (Agure 1). Over theyears the city has improved and enlargedthis display of hardrock gold mining, one of

""I'l,;f; the few left in northern California. With tv.<>adits (horizontal passages into a hillside) anda connecting Io'ertical shaft. the 61·acre

Ponal

Figure 2. lsometnc dra.....lng stlowlf'Ig theGold Bug and Priest mtnes. The lines01 sectIOn are spaced Sleet (1.5 m)apart. Orawmg by George Wheekbnand As.socIales.

If Wasn't Beginner's Lucke by Carol Mathis.

68 CAUFQRNIA GEOlOGY MAY/JUNE 1993

'"

0

EL DORADO ~

COUNTY .. .,.0 .'• q..#::~

0>o

•0-

Placerville

Figure 1. Locallon map of Gok:! Bug Par1l.

49

0.5 Kilometer

0.25

N

~oIo

The upper level. the Priest Mine. wasstaned before the Gold Bug. whichworked the same quartz vein. This upperlevel is an excellent example of an early

Records from this early period havebeen lost to fire but VJe do know some­thing of lhe Gold Bug's history, Miningwas probably started by WilliamCraddock and John Dench in 1888.lbey named the mine the Hattie Mineafter Craddock's eldest daughter, 1heclaim was then sold to Thomas Bishopand Frank Monaghan in 1902, In 1926llle nexl owner. John McKay, renamed ittile Gold Bug Mine and operated it untilWorld War n. when President Rooseveltordered all gold mines closed becausethey were deemed non-essenlial.

Shaftopen to surface

Near the Gold Bugr'l by Corol Malhis,

CALIFORNIA GEOLOGY MAY JUNE 1993 69

The Mother Lode gold deposits of California rankwith a handful of others in the world as the most pro­ductive. The total production of the Mother Lcde farexceeds several billion dollars. Much of this gold wasproduced when it sold for less than $30 per ounce.

Photo 1. POi1al of the Gold Bug Mine.

The Melones Fault Zone seems tocontrol the location of gold deposits and,in this area, truly is the Mother Lode. Thesurface of this fault can be seen in a nearvertical roadcut behind a group of storeson Main Street across from Placerville'sCity Hall. Here, vertical layers of shearedtalc schist and metamorphosed shale arewell exposed, With a little huntlng, youcan find a few small quartz veins in theexposure.

THE MINE TOUR

HangtOWfl's wid Bug Mine Park is ina pleasantly shaded valley \.\lith a streamrunning through it. Stairs lead up a hill tothe entrance, or portal. of the wid BugMine (photo 1). There sits an old ore cartsimilar to the ones used in the mine(photo 2). The steel doors and heavytimbering were recently added for safety

areas where large masses of gokHlearingrock were removed.

The quartz veins followed by themine workings dip steeply to

the east and parallel themetamorphosed sand­stone and shale layers.The large, irregular open­ings that extend abovethe ceiling of the widBug adit are stapes,

The wid Bug Mine is approximately1,000 feet (305 m) east of the MelonesFault Zone. the geologic name for theMother Lcde. The wid Bug and Priestmine adits are in metamorphosed sand­stone and shale of the Calaveras

Fonnation.

tabular and dip steeply to the northeast.The mineralogy of the deposits is simple.consisting mostly of white quartz rib­boned with bands of slate or schist andminor amounts of iron pyrite (fool's gold)with pure gold (Dodge and Loyd, 1984).

The Mother Lode is a 1- to 4-mile- (2, to 6-km-) widesystem of mineralized rock and quartz veins that extendsfrom Mariposa County north to EJ Dorado County(Clark. 1980). Some geologists extend this zone toinclude related deposits in Placer. Nevada, and Sierracounties north as far as l::>o\.vnieville. Productive quartzveins are typical of the northern portion. while golddeposits in large bodies of carbonate rock are morecommon in the south. The veins and ore b<xlies are

Figure 3. Three aditterms can be remem­bered by visualizing a'our-legged animal headingtoward the end of the passage­way.

Near the caved entrance to the Silver Pine Mine isthe 8-stamp mill. The two sets of four stamps wereassembled from two 5-stamp mills and were probablyplaced here in the 1920s or 19305. They are some ofthousands turned out by the Joshua Hendy [ron Worksin San Francisco. The stamps, a hopper, amalgamplates. and a shaker table, all of which are being restoredto working order. are housed in a new structure.

GEOLOGY OFTHE MOTHER LODE AND

THE GOLD BUG MINE

185O's mine and the back, or ceiling,shows tool marks left by hand picks(Rgure 3). Priest Mine is so namedbecause of the Catholic priest sent bythe Archbishop of San Francisco to saymass for the early miners.

70 CALIFORNIA GEOLOGY MAY/JUNE 1993

and security against vandals. Inside, theribs (as the walls are called) and back areheavily timbered because thts is the zonewhere the rock is most weathered andtherefore weakesl (Photo 3). The darkmetamorphosed schist in the mine isexposed just outside the portal. besidethe ore cart. This hard. tough rock origi­nated as soft mud and sand on the floorof a PaleozoK: sea some 300 minionyears ago.

More than SO feet (ISO Tn) inlO themine the waDs are not timbered. so thepassage IAlidens. Stop for a few minutesand adjust to the darkness. Look up atthe rock u.>aIls !ising above your head.The large opening above you is a stope.

otice the white quartz eagerly folb.l..oedby the miners because they thought itmight contain gokl. As you walk farther.watch the exposuTes of this quartz vein.C\earty the miners were following it towherever it might lead. Several other

Photo 2. eta cart at Gold Bug portal.

Photo 3. TImt>enng in the Gold Bug Ilearthe ponal.

stopes suggest that the miners' labor waswell rewarded. Sporadically along the leftrib there are sleel plates hekl in place bylarge nuts and bolts. These are rock boltsused to prevent the black schist fromcollapsing into the adit. The bolts wereput into drill holes. anchored in the rock.and secured with plate and nut.

A pneumatic drill Is 170 feel {52 m}from the portal. positioned as it VoIOUIdhave been for drilling holes for explo­sives (Photo 4). Operated by compressedpiped-in air. this machine was a vastimprovement over the hand tools usedfor many years in the Mother Lode. ThenWTlber of holes drilled in the IN'Orkingend of the adit (the face) depended onthe hardness of the rock. Each hole wascarefulJy Joaded with blasting poYJder ordynamite and fuses. Cloth was gendypacked into the remainder of the hole toconcentrate the force of the blast on therock. The man responsible for this mostimportant job was called the po..vderman. He was among the most highlyrespected of the mine crew because thelives of the other miners depended onhis care and skill. It has been said thatthere were no oklo careless powder men.

The adit turns to the left and aban­dons the white quartz vein. VJhy thechange in direction? Possibly the goldrecovered so far was not up to expecta­tions. or maybe the miners just thoughttheir luck woukl improve by striking offin a new direction.

This part of the adit runs across thestructure of the rock and exposes someother kinds of rock. Notice the whiterock in contact with the black schist. Thiswas a pure quartz sand on the floor ofthe Paleozoic ocean and has now beenhardened and solidified by the heat andpressure of metamorphism. In terms ofmineral content it is almost identical tothe white quartz vein foUoo.ved by the aditbehind you. but its origin is quite different.The sandstone quartz accumulated on thefloor of an ancient ocean: the vein quartzcrystallized from hot igneous fluids.

Walk 20 feet (6 m) beyond the drill.10 Stop 8 (designated by a reflector). andlook up. The back glistens I4'ith groundu:a­ler. Under the moisrure. tiny stalactites ofcaldte are beginning to fonn from thelime in the groundwater solution. Theselittle cave ornaments did not start to form

CAlIFORNIA GEOlOGV MAV/JUNE 1993

Tour Information

• Tours are guided and a nominal feeis charged. Tours can be arrangedfor groups throughout the year.

• The mine lighting is subdued, so youmay want to bring a strong flashlightto see details in the high stopes.

• The mine's numbered slops aredesignated by reflectors. These stopscorrespond to an audio cassette touravailable at the mine.

Photo 4. Pneumatic drill.

REFERENCES

until the arlit was dug. With a sharp eyeand a good light. you can see that manyother parts of the back are covered withcalcite.

unmineralized dead end. It is apparentthat no ore was found on the rightbranch other than in the vertical stopebecause there are no other slopes.

Clark, W.B., 1970. Gold districts 0' California:Division of Mines and Geology Bulletin193, 186 p.

Dodge. F,W" and Loyd, R.e.. 1984, Golddeposils of the western Sierra Nevada:Field Trip Guide: U.S. Geological SurveyOpen File Report 84-169, 25 p.

Seven feet (2 m) beyond Stop 8. theblack schist and white metasandstone areinterfingered (Photo 5l. That is. bands ofschist and metasandstone penetrate oneanother as when the fingers of two handsinterlace. These formed in an ocean basinwhere white sand settled on black mud. Inthe next 15 feet (5 m) of adil. thick layersof schist and metasandstone alternate.Can you lind a plane between these tworock types? This plane. now tilted. origi­nated on the level floor of the ocean.

The adil splits alter another 80 feet(24 mI. The left branch of the aditexplores new ground for nearly 30 feet(9 m) and then ends. The right branchfollows a second quartz vein-the sameone followed by the Priest Mine on thelevel above. Look over your head. A verti­cal stope rises 20 feet (6 ml. then turnsat a steep angle. continues 30 feet (9 ml.and joins the adit above. The slope thenrises another 50 feet (15 m) and breaksfree to the surface. It is this combinationof venical shafts and stapes that providesair circulation throughout the mine.The branch follows the new group ofquartz veins for 55 feet (17m) to an Photo 5. Black schist and white metasandstone near Stop 8.

CALIFORNIA GEOLOGY MAY/JUNE 1993

HANGTOWN'SGold Bug Park

PIaceMIJe Parks andRecreation Department

(916) 642-5232

Gold Bug Pari<. is off Bedford Avenue. less than1 mile north of U.S. SO.

Houts

late March through April 30Saturdays and Sundays. 10 am to 4 pm

May 1 through Labor DayDaily, 10 am 10 4 pm

After Labor Day until md-OctoberSaturdays and Sundays, 10 am to 4 pm

On February 1. 1985. the Gold &9Mine was placed on the Notional

Register of Historic Places.Picnlc area near lhe Gold Bug Mme portal

E/ Dorado Rockerc by Carol Mathis.}

, tJ .

A catalog of the mining sketches in this article and other drawings by Mathis family artists is available from FRIDAY HOUSE.941 Cottage Street, Placerville. CA 95667. (916)621-1661. $5.00 postage paid.

CALIFORNIA GEOLOGY MAY/JUNE 1993 73

The Mineral Industry of Califomia-1992

INTRODUCTION

Califomia "''as secorxl in the nation inthe value of nonfueJ minerals produceddUring 1992, following Arizona. Californiaproduction was estimated at $2.47 billion.dropping 2 percent from 1991 arx:laccounUng for nearly 8 percent of the U.S.total. California led the other 48 stales inthe production of boron minerals. port­land cement. diatomite. calcined gypsum.construction sand and gravel. rare earthconcentrates, natural scxllum sulfate. andtungsten. Portland cement was the mostvaluable commodity produced. loll()\.lJ(?(j byconstruction sand and graveL gold. boron.crushed slone. soda ash. and diatomite.11le continued drop in gold and silverprices led to declines in precious metalexploration throughout the State. HO\.lrever. explorntion continued in the MOlherLode arca of the Sierra Nevada and thedesert region of southeastern California.

CASTLE MOUNTAIN MINE

On February 17. 1992. Castle Moun­tain Mine poured lis first gok:I. This SanBernardino County mine Is expected 10prodoce 100,000 ounces of gold the firstyear. increasing to 160,000 ounces in thefourth year of production. The propertyhas the potential to operate at this leveluntil the year 2004. Castle Mountain ranksfourth among the gold mines in California.trailing the Mclaughlin Mine in NapaCounty. the Mesquite Mine in ImperialCounty. and the Jamestown Mine inTuolumne County.

Castle Mountain Mine is in what waskJlo,.m as the Hart Distrkt. Discoveredin 1907. the Hart District experienced amining boom only to ~go bust" by 1910,after the high grade ore had played out.Since then there ha...e been several unsuc­cessful aflempts to reactivate gokl produc­tion. During the 19205 and 19305 therewas major production of high grade clayfrom hydrothermal alteration zones in andaround the gold deposits. The day wasused to produce high quality day productssuch as toilets. sinks. and floor tile.

The Castle Mountains were againprospected in the 1980s. but with theob;ective of finding large low-grade golddeposits rather than high grade veins.The most promising target was drilledwith good results. Surprisingly. six ore

JOHN BURNETT, GeologistDivision of Mines and Geology

bodies were located, three of which hadproven reserves of minable gold ore.

1he gold deJX)Sits are within a complexrhyolite dome field intruded by rhyolite plugsand cut by zones of broken day-rich rock.Commercial day production came fromthese common zones of altered silica andclay. Silicified and mineralized arcuale frac­tures suggest that the deposits lie near thecenter of a small caldera. or collapsed vol­cano. One deposit. buried by as much as300 feet of gravel, was discovered by ge0­

logical interpretation (Under. 1989).

Viceroy Gold Corporation. the CastleMountain Mine operator. has been a leaderin establishing good environmental policiesto develop. operate. and close the mine(Pirozzoli and Pompy. 1992).

SODA ASH

California has large reserves of sodaash. a baslc raw material in the glass andpaper pulp industries. Recent techllOiogicaldevelopments by the two largest soda ashproducers in California may result in impor­tant increases in production.

Kerr-McGee Corporation sold the brinedeposits at dry Searles Lake, San Bemar~

dino County. to the North AmericanChemical Company. New solution miningtechnology scheduled to be implemented in1984 is expected to triple production to1.800.000 tons per year.

At Qv.rens Lake in Inyo County.Corninco American has been scrapingsoda ash from the surface salt deposit atthe dry lake. A recent agreement withVulcan Chemicals of Binningham. Alabamaallows for advaoced mining equipment andincrease in capacity of this operation to600.000 shan tons per year.

ASBESTOS

After 20 years of controversy. the Occu­pational Safety and Heahh Administration(OSHA) has ruled ~there is insufficient evi­dence to conclude that llQl1-asbestiform tre­molite. anthophyllite and actillOlite (amphib­oles) present a health risk similar in kind andmagnitude to that of their asbesliform coun­terparts -

The crux of the flOfl-asbestifonn amphi­bole issue has been the assumption that

all fonns of amphibole and chrysotile arehannful. and the designation of a 3: 1 lengthto width ratio for mineral fiber as the crite­rion for this dassiHcation. Such definitionshave kept the issue in dispute since 1972.when the first Asbestos Standard was issuedby OSHA. The issue was further compli­cated by the Mining Enforcement andSafety Administration (MESA), which pro­posed to replace the word "asbestos" in theexisting legislation with the term ~mineral

fiber: In 1984, OSHA acknowledged thatits asbestos definition was mineralogicallyimprecise but it was not until this year thatthere was a fonnal recognition that non­asbestifonn materials are not health risks.

Although this is good news lor theNorth American mining industry. it comestoo late to save the California tak industrywhose product contained a small percent­age of tremolite. 1he closure of CalaverasAsbestos Ltd. in Calaveras County late in1987 left only one California asbestosproducer. KCAC. This San Benito Countyoperation is consklered the largest oredeposit of this commodity in the \.VOrid.covering 40 square miles to a depth of atleast 1.000 feet. It produces short fiberchrysotile without asbestifonn amphibolecontamination and exports it to Asia for usein asbestos cement.

1872 MINING LAW

The General Mining l...aw of 1872W<lS passed to regulate mining on federollands. In recent years it has been criticizedby those who contend that its provisionsare outdated and contrary to the publicgood.

The process of patenting is a verycontroversial issue. Some see it as a "give­away" because public land can pass intoprivate ownership for only a small fee($2.50 to $5.00 an acre according toBaca. 1991). However, the governmentdoes not consider patenting unless discoveryand polenlial economic recovery of themineral resource have been proven. Analy­sis of patenting costs shows they averageabout $17.000 per acre {Blubaugh. 1992).

Critics also charge that the 1872 lawdoes not require payment 01 royalties 00

minerals extracted from public lands. Sup­porters of the existing Act argue that lawrefonn would result in a net Joss of staterevenue.

" CALIfORNIA GEOLOGY MAY JUNE \993

Baca. Jim. 1991. 1872 Mining Law: TImelor retorm: Geolimes, v. 36. no. 11. p. 6.

Blubaugh. RoE" 1992, 1872 Mining law:TIme lor clanlicalJOn and affirmation:Geotlmes. v. 37. no. 4. p. 6.

REFERENCES

Under. Harold, 1989, Hart Minmg Dlstncl,San Bernardino County. California: CALI·FORNIA GEOlOGY. v. 42, no. 6. p. 134­140,143.

Plrozzoh, L.A., and Pompy, J,S., Implement­ing an award winning reclamation plan atCastle Mountain Mme: CALIFORNIAGEOLOGY, v. 45, no. 6, p. 182·186.

NONFUEL MINERAL PRODUCTION IN CALIFORNIA 11

1990 1991 1992elMINERAL

QUANTITY VALUE QUANTITY VALUE QUANTITY VALUE(Ihousands) (thousands) (thousands)

Boron minerals ............. thou. metric Ions 1,094 $436,176 1,240 $442.531 1,020 $332,720

Cement (portland) .......... thou. short tons 10.032 604,080 e18.702 e{522,12O 9.145 548,700

Clays 21.................................. metric tons 2,163.515 40,217 2.074,707 27.464 1,975.828 33.800

Gemslones .......................................... NA 1,501 NA 10.450 NA 10.119

Gold 3J ............... .................... kllograms 29,607 368.300 29,873 348,919 37,160 418,152

lime ........... ................... thou. shor1 tons 345 19.425 307 20,389 351 23,310

Mercury ................................. melrlc tons (41) (4~ (4~ 1 (41) 1

Pumice ..............................................00. 71,739 5.068 61.237 4.372 W W

Rare-earth metal concenlrales .......... 00. W W 16,465 W 16,000 W

Sand and gravel:Construe!lon ............ thou. short Ions 132,214 626,000 &1101.900 ef489.1OO 96.800 473.300Industrial ....................................oo. 2,452 48.055 2,104 41,690 2.010 40.572

Silver 3J ................................. metric Ions 21 3.209 W W 15 1,929

Stone:Crushed .. .............. thou. shor1lons e/42.5OO 200.600 45,816 216,156 41.200 200,200Dimension .. ................... shor1 tons ef30.077 eJ5,213 44,757 5,254 23,292 4,148

Combmed value of asbeslos (1990·91):bante (1990): calcium ChlOride (nalural1990·1991). cement (masonry), clays(Mer's earth), copper (1990,91): dialomile.leldspar. gypsum (crude), iron ore (usable),magnesium compounds. mica (crude 1991),molybdenum, perlite. potash. sail.soda ash, sodium sulfale (nalural),lalcand pyrophyllite.titanium concentrates(Ilmenite). tungslen ore concentrates.and values indicated by symbol W.

XX 421,820 XX 403,592 XX 379,631

Total XX 2.779,684 XX 2,532,038 XX 2,466,582

ef. EstImated. NA • Not available W • Withheld to aVOid disclosing com·XX • Not applICable pany proprietary data: value Included

Wllh ·comblned value"ligure.

1f. Production as measured by mme shipments, sales, or mar1<;etable PfoducllOn (including consumption by producers).21. Excludes cer1ain clays: klnd and value Included With "Combllled value" data.3/. Recoverable conlent 01 ores. elc.4/ • Less than 1{2 Unit.

CALIFORNIA GEOLOGV MAY/JUNE 1993 75

Mines. Mining. and Mitlerals

MINES AND MINERAL DEPOSITSOF SAN BERNARDINO COUNlY.CAUFORNlA. By L.A. Wright. R.M.Sl:ewart. T.E. Gay. Jr.. and G.C.Hazenbush. 1991. California ProspectingCo.. 7906 La Pabna, Buena Park. CA90621.(7141761-1846 192 p. $32.50.soft covet'.

A private reprinting of the 1953report published by the Division of Mines.this volume fills an important niche. Theoriginal report has been out of print for25 years and is only available throughlibraries. The report gives a brief summaI)'of each mineral deposit in lhe intenselymineralized. largest county in lhe UnitedStates.

The entire volume is reprinted includ­ing the tabulated list of mines and mineraldeposits and a one-color map. Thetext provides a summaI)' of the geology.descriptions of the most significant metaland non-metal mines and mineral dis­tricts. and an exhaustive bibliography.The book will be a \.vdcome addition tothe Iibral)' of anyone Interested in theCalifornia desert.

MINERALOGY OF THE MOHAWKMINE. SAN BERNARDINO COUN1Y.CAUFORNIA. By William S. Wise. 1990,Quarterly. v. 37. no. 1. San BernardinoCounty Museum Association. 2024Orange Tree Lane. Redlands. CA 92374.(714) 798-8570.31 p. $12.78 includingshipping and tax. soft cover.

This publication is a geologic andmineralogic descripdon of a mine INeSt

of Nipton that is a source for interestingarsenates of line. copper. and lead. aswell as zinc-manganese oxides and variouscarbonates Forty-three minerals. derivedthrough the oxidation of simple sulfKJeore minerals. are described in detail.

lhese and other varieties are in colormacropholographs and photomicro­graphs.

STANDARDS FOR AGGREGATES.By D.C. Pike. 1990. Prentice·HaD. Inc.Order Processing Center. PO Box11073. Des Moines. lA 50381·1073(SIS) 284-6751 280 p. $9900. ham"""'.

Aggregates Include a variety of materi·aIs such as sand and gravel. crushed rock.and processed waste products that canbe \.l:SC!d as substitutes for q.Janied rockin construebOn, Because aggregates areused in nearly aU engineering pro,eas.they are indispensable. The annualdemand for aggregales in the UnitedStales is about 7 Ions per person andthis demand is expected 10 remain fairly

"""""',Aggregates must conform to specific

engineering standards lor optimum use.They must be hard. strong. and durableparticles. The author divides aggregatestandards into four main categories: con·

crete, building mortars. bituminous mate­rials. and unbound aggregates. Someimportant aggregate standards pertain10 grading. particle shape and texture.specif)c gravity. absorption capacity. resis­tance to freezing and thawing. resistanceto abrask>n and chemical reactivity. andcompressive strength. Review by DonDupras.

BlBUOGRAPHY FOR METAlliC MIN­ERAL DISTRICTS IN APACHE.COCONINO. AND NAVAJO COUN­TIES. ARIZONA. OrOJlar 28. &j JohnW Welty and William L~.1989 Arirona Geological 50""". 845N Park Avenue. #100. Tucson.A285719.(602) 882-4795. 47 p. $9.00.plus $3.00 postage. soft cover.

For each of lhese three nonhemArizona counties. references are listed bymining district. There are nearly 1.000citations. This cirOJlar is the fifth andlast in a series of county-by-county bibli·ographies for metallic mineral districts inArizona.

" CAUfORNlA GEOlOGY MAY JUNE 1993

QUICKSILVER The Complete Historyof Santa Clara County's New AlmadenMine. By Jimmie Schneider. 1992. NewAlmaden Quicksilver County Park Asso­ciation. P.O. Box 124. New Almaden.CA 95842. (408) 268-6541. 178 p.$29.23 plus $7.77 postage. hard cover.

This book depicts the fascinating his­tory of the New Almaden. the UnitedStates' largest quicksilver (mercury) mine.The story encompasses the time fromthe mine's discovery in 1848 by Andres

I,I

Castillero, through its present situationas one of Santa Clara County's largestparks. It tells of the financial manipulationand legal conflict: the growth, prosperity,and decline of the deepest quicksilvermine on earth: and the people who con­ducted the business of the mine, workedthe mine, and pursued everyday life on~the hill."

Quicksilver contains over 150 orig­inal photographs, charts. and maps.most of which have not been previouslypublished.

Group tours of the museum. town,and mines can be arranged by callingKitty Monahan at (408) 268·6541.

HARD PLACES: Reading the Landscapeof America's Historic Mining Districts. ByRichard Francaviglia. 1991. Universityof Iowa Press, Publications Order Depart­ment. Oakdale Hall. Iowa City. 1A 52242.(800) 235-2665. 237 p. $35.00. hardrove,-

Visually and socially. mining areas are"hard places." Francaviglia categorizesthe basic elements of the landscapes ofmining districts-the topography andvegetation, the arrangement of streetsand property parcels. and architecture.These visual clues help detennine themajor processes and forces that shapedthe landscapes.

Mines are often isolated initially. buteventually settlements grow around themineralized area. With growth comesdiversity. and specialized mining and pro­cessing communities develop in the min­ing district. The percentage of miners inthe population decreases as providers ofservices move in. What ultimately hap­pens to the declining district dependslargely on perceptions. FrancavigJia ex­plores America's "hard places~ and howthey reveal our deeply hekl values andattitudes toward land and life.

Petroleum Explorationand Engineering

BIOLOGICAL MARKERS IN SEDI­MENTS AND PETROLEUM. Edited byJ. Michael Moldowan. Pierre Albrecht.and R. Paul Philp. 1992. Prentice-Hall,Inc.. Order Processing Center, P.O. Box11073, Des Moines. IA 50381-1073.(515) 284-6751. 411 p.. $68.00. hardcover.

This handbook presents new resultsin biological marker research coveringbiomarker organic chemistry. structureidentifications. and the effects of deposi­tional environments on biomarker diagen­esis. It will assist the reader in appliedand fundamental research in organicchemistry as well as petroleum explora­tion. Subjects include case histories forpetroleum basins. advances in geochemi­cal processes. and the latest techniquesfor biomarker analysis.

WELL PERFORMANCE. Secondedition. By Michael Golan and CurtisH. Whitson. 1991. Prentice Hall. Inc..Order Processing Center. P.O. Box11073. Des Moines,lA 50381-1073.1515) 284-6751. 669 p.. $74.00.hard cover.

This book explores the engineeringoperations involved in analyzing the pro­duction behavior of oil and gas wells. Theeffect of well size. reservoir data. andoperation conditions are discussed alongwith practical techniques for hydraulicdesign of wells. Well Performanceincludes numerous examples of proce­dures, productivity changes due to stimu'lation treatments or reservoir depletion.and applications of artiflciallift methods.

ASlronomy

CELESTIAL DEUGHTS: The Best Astro­nomical Events through 2001. By FrancisReddy and Greg Walz-Chojnacki. 1992.Celestial Arts Publishing. P.O. Box 7123.Berkeley. CA 94707. (BOO) 841·2665.135 p. $16.95. soft cover.

Many people believe that exploringthe night sky requires lots of time. expen­sive equipment. and perfect weather con­ditions. but this book shows us how wecan en}oy the simple beauties of the skyin much the same way our ancestorsdid-with the unaided eye. Knowing thatthe planets circle the sun is one thing.but recognizing how that movementexpresses itself in the sky above us isquite another. The reason that most ofus do not appreciate the heavens is sim­ply that we have not taken the time tolook The ancients may not have under­stood the sky as well as we do. but theycertainly knew it better. Yet we have theadvantage because the basic motions thatfascinated the ancients remain on display.We have the opportunity to both knowand understand.

The introouction and eight otherchapters describe the motions of heavenlybodies such as the moon. sun. planets.and meteors. There are color photo­graphs from satellites and large tele­scopes. as well as many illustrations in­cluding silhouettes of astronomical situ­ations and the dates they are expected.

CALIFORNIA GEOLOGY MAY/JUNE t993 n

The appendix can only be describedas a datebook of future events. Forexample:

- Nouember 3. 1995---SOuthernTaurid meteor shower peaks tonight.Moon interferes.

-June 11. 1999-Moon near SatUrllthis morning. Venus (4.3J reachesgreatest eastern elongation (45G

).

This is its least greatest elongation inthe twentieth century. Mercury (·O.6)emerges from the sun's glare andenters euening twl/ight. Begin look­ing for it below and to the right ofbrilliant Venus. low In the west thirtyminutes after sunset. /t remains wellplaced for the rest of the month.

Applied Enhanced Oil Reeouery willbe of special interest to field engineersand personnel. investors. managers. 0\.VTl­

ers. and anyone involved in petroleumproduction. energy supply. and environ­mental issues.

SIERRA NORTH: 100 Back-CountryTrips. Sixth Edition. By Thomas Winnett.Jason Winnett. and Lyn Haber. 1991.Wilderness Press. 2440 Bancroft Way.Berkeley, CA 94704. (800) 443·7227.303 p. $14.95. soft cover.

This book describes 100 2-day 102-week back-country trips chosen by theauthors on the basis of scenic attraction,

wildemess character. and recreationalpotential. It covers the Sierra Nevadafrom Carson Pass SOlIth to Mono Creek.The Sierra Nevada is the longest andmost extensively-trailed mountain rangein the United States with much of thefinest scenery and best fishing in theback country. accessible only by foo.

According to Sierra North. whenYosemite's Galen Clark (MOld Man of theVaIIeyM) was asked how he ~got about"that famous valley he replied. MSIovJIy!Mlhat is the philosophy the authors haveadopted in this book. With only a lewexceptions, trips are based on a leisurelypace so the hiker can enjoy more of thesights and smells of the country.

Celestial Delights isa good choice for anyoneinterested in developing anappreciatkln of the stars andplanets.

APPUED ENHANCEDOIL RECOVERY. By AurelCarcoana. 1992. Prentice­Hall. Inc.. Order ProcessingCenter. P.O. Box 10073.Des Moines.]A 50381-1073.1515) 284-6751. 292 p..$64.00. hard cover.

The step-by-step progres­sion of the complex problemsof oil displacement in porousmedia using enhanced oilrecovery methods is presentedin this volume. Basic engineer­ing conceptS. illustrations.example cakulations. andcase histO!ies help the readerunderstand the target. meth­ods. and results, as well asemphasize the importanceof the future of enhancedoil recovery. This bookdescribes and illustrates meth­ods. presents procedures forthermal oil displacement usingsteam and in-situ combustion.explains petro-mining andflocx:ling techniques. andcovers recent developmentsin microorganism·enhancedrecovery.

Columnar ;OInting In a PleIstocene basalt Ilow, DeVilS PostPile NallOna! Monument. Madera County. CaUfarnla. Phoroby Dale SrlC1<ney

The book points out thatwhile most people think ofYosemite Valley as toocrOVJded, it is possible tospend a week in the backcountry of northern YosemiteNational Park and see no one.Most of Yosemite is declaredwilderness area. One can takeadvantage of that by followingsome of the nearly 1.000 milesof trails.

Readers are provided witha day---by-.ooy account describ­ing whal they will see andI4'here to camp. For instancewhen describing the CarsonPass the authors state, M1heCarson Pass area flanks thefirst trans-Sierra highwaysoulh of Lake Tahoe, As arecreational area. it OOastsmany lakes off the highwayand a few beside thehighway...Some of the bestflower displays in the entireSierra grow alongsidethe trails in this part of SierraNor/h. such as the trails toScout Carson Lake and Show­ers Lake." Or. regardingcamping near Carson Passthey suggest, M...you couldspend the night before hikingat Sorensen·s. Kit CarsonLodge. Caples Lake Resort orKay's Sliver Lake Resort...•

78 CALIFORNIA GEOLOGY MAY/JUNE 1993

Rocks. trees. flowers. and animals aregiven anention in this book. It includes a41::oIor fold-out traiJhead map and stateswhich topographk: maps are needed

This latest edition contalflS hundredsof updates and three new trips. SierraSouth. a compankxl vobne CCllJering thesouthern Sierra is also available

DAYHIKER. By Robert 5 Wood 1991Ten Speed Press. PO. Box 7123. Berke­Ioy.CA94707(SOO)841·2665175p.

895. soft CoYer'

Dayhiking possibilities. from an exu­berant five.minute jaunt on a lunch breakto an aD day trek In the wilderness. areCO\.o'efed in this book. Dayhiking offerssomething lor~tion. fit­ness. increased energy. retief from stTess.comnu\ion W\th nature. and a sense ofachie\lement. h is also free. safe. and fm.

Doyhlker describes basic types ofwoIks _. half dayo. IuD dayo. rom·brnations. extended tnps. and climbs. Itprovides prac:ticaI information on how toget the most from each type of walkOther chapters cover the secrets of whereto go. what to take. trail manners. walkingtechnique. hiking with children. readingthe VJeather. and route finding. Specialfeatures include eating for greater energyand weight loss. and trailside first akl.

Volcanoes

VOLCANOES OF NORTH AMERICA,United States and Canada. Edited byCharles A. Wood and Jurgen Kienle.1990. Cambridge University Press. 110Midland Ave.. Port Chester. N.Y. 10573.(914) 937·9600.354 p. $79.95 plus$2.00 shipping. hard CoYer'.

This survey of all North American~ active during the last 5 millionyears is Ulustrated with numerous mapsand pho<_pN. The moq>hoJogy. ""'"live history. hthoklgy. access routes. andreferences for each of 262 vobnoes aredetailed by 81 expertS. For example. theentry for Mount Shasta. California's mostprominent and. possibly. most important\IlJk:ano. is:

Type: StratouolcanoLat.wng: 41.40"N. 122.18'WEleuotlon: 4.317 m

Eruptive HIstorv:

• Initiation of octllllty059 MoCone collapse and auo­lancfle,03Ma

• Sargents Ridge Cone:<0.25 Ma

• MIsery Hill Cone: <0 13 Ma

• $hastma Cone -9.500 vr BP

• Hot/urn Cone <9.500 yr BP

• JO or more additIOnalHolocene eruptiOns

Composition: Silicic andesite todacite

A """"""" 0I1he """"","",t andhistay of Momt Shasta folcN.rs ~,th

aerial pho<""",pN (obloque and """""l.and a topographic map.

This compilation is essential for v0ca­

tional and avocationall1lOll'ltain hunterswho want a solid reference on some ofthe most excitmg peaks anywhere

Paleontology

AFTER THE ICE AGE. By E.C. Pieloo1991 University of ChiCagO Press.11030 South Langley Avenue. Chicago.IL60628 (8001621·2736.366 p..$13.95. sollcoYer'. $24 95. hard cover.pM $3.00 "",!age.

Environmental transfonnations havebeen greatest in northem North America.umere ice sheets of the last ice ageformed an unbroken expanse coveringnearly aU of Canada and the northem tierof the United States.

After the fee Age tells what happenedin this land betu!een the glacial maximlnl20.000 years ago and now The environ­ment changed as the ice melted and lifereturned to the lifeless semk:ontinentMastodons. mammoths. sabertooth cats.and giant short-faced bears were some ofthe early inhabitants that became extinct.replaced by grizzly and polar bears. cou­gars. bighorn sheep. and other speciesthat still survive in what wUd land remains.

The author traces these lNefltsthrough the fossil record and presents aneasily read stOfY of changes to the land.its plants. and animals. Common namesare used throughout. but two appendices

list all terms used. by the common nameand the sdentifk: name. ExtensiYe notesW\th references are induded for eachchapter and an index completes the c0l­lection of loois that wiD be helpful for thereader WIthout a technical background.

PLANT FOSSlLS IN GEOLOGK:ALINVESTIGATION The Palaeozoic.Edited by ChriSl:opher J. C1eal. 1991Eiis Horwood Umited Distributed byPrentice·HaD. Inc.. Order Processing Cen­ter. PO Box II07l. DesMoines.1A50336-1071 (515)284-6751 233p.$7400. hard cover.

This book disct asses how terrestrialplant macrofossils can assist in the paM»geographical. biosrratigraphical. and pa­IeoecdogK:aI analysis of Silurian to Per·mian strata throughout the world. Theapproach is to demonstrate the sort ofresolution that these fields can provide.and in what types of sedimentaIy rocksthey can be used.

Space limitahons have restricted thedocumentation included. but the refer­ences will guide the reader 10 the litera­ture where descriptions and iBustral)()l'lS ofthe fossils can be found. The discussKln is

limited to large land plant fossils becausethe study of marine fossils is more limitedin scope or requires complex laboratoryprocedures. The author believes the mate·rial presented w111 be of greatest value tothe field geologist.

Eustasy

EUSTASY: The HistoricalUps and DovJns of a Major GeologicalConcept. Memoir 180. Edited by RobertH. Doll. Jr. 1992. Geological Societyof America. Inc.. P.O. Box 9140. Boul­der. CO 80301. (BOO) 472-1988. III p.$4500. hard cover.

Eustasy. or woRfwXie change of seaIevel.. ts a significant and complex conceptthai had its historical beginnings m theflood myths of ancient do.iJiz.ations Thenine chapters of thts book discuss thehistory of eustasy. from the l&h centuryIdeas of neptunism 10 the 20th centlA'ythoo..ght of Chamberlin and Grabau. TheIdea of cyclothems and the modem per­spective of seismic stratigraphy are ahod""""",

CAlIFORNIA GEOlOGY MAY JUNE 1993 "

Teacher Feature

MIMNG AND MINERALRESOURCES GUIDE

When requesting in/ormation. useschool stationery.

ASSOCIATIONS

Bureau of Mines. Audiovisual Ubrary.Cochrans Mill Road. P.O. Box 18070.Pittsburgh, PA 15236. Rims and videos(short-term. free-loan): free brochures andpublications: INTite lor free catalog.

Department of the Interior Office ofPublic Affairs. Washington. IX 20240.Motion pictures and video tapes dealingwith resources (short-tenn, free loan).

U.S. Geological Survey. Mary Orzech.912 National Center. Reston. VA 22092.FAX: (703) 648-6683. JEDI-An innova­live approach to data sharing by scientistsand teachers.

American Coal Foundation. 918Sixteenth Street. NW.. Washington, DC20006. Brochures. publications.

American [ron Ore Association. 514BuIkey Building, 1501 Euclid Avenue.Cleveland, QH 44115. Brochures.

American Mining Congress. 1920 NStreet, NW, Sulle 300. Washington. DC20036. (2021861-2800. ~What MiningMeans to Americans~ brochure free toteachers.

California Mineral Education Founda­tion. 9647 Folsom Boulevard. Suite 148.Sacramento. CA 95827. (916) 362-9305or (209) 223-0658. Education materials:Earth Science Resource Guide; mineraleducation conference for teachers.

California Mining Association. 1121L Street. Suite 909. Sacramento. CA95814. (916) 447-1977. Mine lourinfonnation. videos.

Lawrence Hall 01 Science. Universityof California. Berkeley. CA 94720.(415) 642-7771. GEMS. a series of activi­ties for K-l 0 grade students.

Mineral Information Institute. Inc..1121 17th Street, Suite 2070, Denver,CO 80202. Curriculum materials: materialfor students: career information; VJrite forfree list.

North American Association for Envi­ronmental Education. P.O. Box 400.Troy, OH 45373. (513) 339-6835.

Society of Mining, Metallurgy & Explo­ration, Inc., P.O. Box 625002, UttJeton,CO 80162-5002. Educational materials:publications.

BOOKS AVAILABLE INTHE PUBLIC LIBRARY

• Rocks and Minerals by Lou Williams.• What is a Rock? by John Syrocki.• A Golden Guide to Rocks and

Minerals by Herbert S. Zirn andPaul R. Shaffer.

• Rocks and Minerals by ilia Podendorl.• The Earth's Story by Gerald Ames• Geology by Catherine E. Orr and Vere

de Vault.

80 CALIFORNIA GEOLOGY MAY/JUNE 1993

•• •

I-------------------------~---I DlVISION OF MINES AND GEOLOGYI Publications Request Fonn

Number of copiesI SPECIAL PUBLICATIONS

I SP034 Geology of placer deposils. 1970......... . $5.00I SP041 Basic placer mining. Reprinled 1970 $5.00I SP086 Foolhill counties mining handbook. 1985...... . $6.00

SP087 Placer gold recove!)' methods. 1986..... . $5.00I SP094 Minerals for indusl!)'. northern California volume II. summa!)'I of geological survey of 1955-1961 ..$12.00

I SP095 ~~~~~~,'~~~5~~~~'.~~u.~~.~~.~.~.Ii!amia ~~~~~~..~~~:.s.~.~.~.~ ..~f..:.~.~ical ... $12.00

I SP098 Fluvial geomorphology and river·gravel mining: a guide for planners. casestudies included. 1990. . $8.00

SP103 Mines and mineral producers active in California (1988,1989). 1990 .. $10.00

GEOLOGIC MAPS OF CALIFORNIA (scale: 1:250.000). Olaf P. Jenkins edition. (REPRINTS).

GAMOO2 Bakersfield Sheet 1964 ... $7.00GAM010 Needles Sheet. 1963 ... $7.00GAM013 Sallon Sea Sheet 1967 ... $7.00GAM015 San Oiego-EI Cenlro Sheel. 1962 .. . $7.00GAM018 San Luis Obispo Sheet 1958 .. $7.00GAM021 Santa Maria Sheet 1959 $7.00GAM025 Ukiah Sheet. 1960 $7.00

teacher feature continued...

• Rocks and What They Tell Us byLester del Rey.

• Everybody Needs a Rock by ByrdBaylor.

• A New True Book, Rocks & Mineralsby llla Podendorf.

• The Magic School Bus Inside theEarth by Joanna Cole.

• How to Dig a Hole to the Other Sideof the World by Faith McNulty.

• Secrets in Stones by Rose Wyler andGerald Ames.

LENDING VIDEO LIBRARY

California Mining Association. 1121 LStreet. Suite 909. Sacramento. CA95814.19161447-1977.

• All That Glitters-Using cyanide safelyin gold mining operations.

• Auoilability of Federal Minerals-U.S.Bureau of Mines.

• Boron-Light Heavy-Weight• Cillifomia Natural Resource Video

Tope series-Emphasizes valuableresources on public lands.

• Common Ground: Modern Miningand You

• Early Gold Mining Techniques inSiskiyou County-Produced by fifthgrade students for California HistoryDay.

• Hardrack Showcase-HumboldtNational Forest

• Intro to Racks & Minerals• Natural Recouery of Prince William

Sound• Out of the Rock• Poway Project• Prosperity Is a State of Mines• The Artie Notional Wildlife Refuge• The Earth Beneath Us• The Greenhouse Conspiracy• The Pet Rock• What Am I Worth?

and silver specimens and mining equip­ment from Cerro Gordo and other minesin the O-vens Valley region.

Empire Mine State Historic Park.10791 E. Empire Street, Grass Valley.CA. (916) 273-8522. Produced nearly6 million ounces of gold. The park has10 miles of hiking trails and a minewith 367 miles of passagewaY'S. Therestored buildings include the owner'scottage. clubhouse. blacksmith shop.hoist house, and machine shop. Films.tours, and lectures are offered daily.

Marshall Gold Discovery StateHistoric Park, SR49, Coloma. CA.(916) 622-3470. Includes Marshall's1860 cabin. gold discovery site, replicaof Sutters mill. picnic facilities, visitorcenter. and museum. Fishing is permitted.

CALIFORNIA GEOLOGY

_ Back Issue (specify volume and rnonlh).

OTHER

LiSI of Available PUblications

INDONESIAN SUBDUcnONZONE SUDE SET

This set of 25 slides illustratesclassic features of the Indonesiansubduction zone. It includes geologicmaps, Landsat views, Krakatau, anadvancing nuee ardente on MerapiVolcano, the carved volcanic templeof Borobudur on Java, Lake Toba onSumatra, and Batur Volcano on Bali.Profits go to the National Associationof Geology Teachers (NAGl) Sum­mer Field Scholarship Fund. Formore information, contact:

NAGTP.O. Box 5443

Bellingham, WA 98227-5443

. $2.00

........................ Free

PLACES TO GO

California Stale Mining and MineralMuseum. Highway 140. Mariposa. CA95338. (209) 742-7625. HousesCalifornia's mineral collection: great fieldtrip.

Eastern California Museum. 155North Grant Street, Independence, CA93526. (619) 878-2411. Contains gold

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CAUFORNIA GEOLOGY MAY/JUNE 1993 "

Teacher's Mineral Education ConferenceAugust 18·20. 1993

The California Mineral Education Foundation will host its third Mineral Education Conference at California StateUniversity. Sacramento (CSUSl, California. The CSUS Geology Department and the California Department ofConS€lVation are cosponsors.

The conference is for teachers of K-12 and will include classes in geology. the history of mining and mining tech­niques in California. environmental and reclamation issues. and the uses and value of minerals. Workshops providehands"On activities designed for classroom use.

Registration is $25.00 and includes a field trip to an operating mine. hand-outs. and some meals. For more infor­mation. contact Barbara Stewart. (209) 223-0658 or:

California Mineral Education Foundation9647 Folsom Blvd., Suite 148

Sacramento. CA 95827

NAME (Please print or lypel _

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Reprints Available

(scale: 1:250,000)

OLAF P. JENKINS EDITION

The maps may be ordered onrhe Publicalions Request Form onpage 81.

GEOLOGIC MAPOF CAUFORNIA

Bakerstield Sheet. 1993. Compiled byArthur A. Smith..1964..$7.00

Needles Sheet 1993. Compiled byCharles C. Bishop..1963..$7.00

Sallon Sea Sheet. 1993. Compiled byCharles w. Jennings..1967..$7.00

San Diego-El Centro Sheet. 1993.Compiled by Rudolph G. Strand..1962..$7.00

san luis Obispo Sheet. 1993. Com­piled by Charles W. Jennings.1958..$7.00

santa Maria Sheet. 1993. Compiledby Charles W. Jennings..1959..$7.00

Ukiah SheeI..1993. Compiled byCharles W. Jennings and Rudolph G.Strand..1960..$7.00

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82 CALIFORNIA GEOLOGY MAY/JUNE 1993

Inside the Priest by Carol Mothis

CAlIFORNIA GEOlOGY MAY.AJNE 1993 "