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IW ell d riller o r authooud ~r\Onl

License No .

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VI RGINIA DI VISION OF MINERAI, RESOURCESBox 3667 , Charlotte s ville , VA 229 0 3

I NTERVAL SHEET

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Exploratory:

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h 7r?>-1 /Tota l Dept : ,JZ>'-"

Oi l o r Gas : Water :

Well Repositor y No . : W- 6'8¥Cl ,j

Sample Interval : from ti:J t o :)''$0

Number o f s ample s : :5JI I

o f IDa t e r e c'd :

PROPERTY : ;jIt/C 8COMPANY : ~t//~~

COUNTY : .5P'U'J.1t?/n//zJff'

Page /

From-To From-To From-To Fr om-To From-To

OWNER : SWBC #178A

DRILLER: SWBC

COUNTY : Southharnpton

QUAD : Drewerysvi lle

GECID3I C ID3

Description of Cutti ngs

VDMR : W-6840

WWCR: C-425

TOTAL DEPI'H : 380 '

~: 120 '

DEPI'H I N FEET

0- 10

10- 20

20- 30

30- 40

40- 50

50- 60

60- 70

70- 80

80- 90

90-100

Sand , clayey , light brown (5 YR 6/4 ) , very fine-to f i ne­grained , subangular , moderately sorted ; quartz , f e ldspar ,muscovi te , rare opaque minerals (glauconit e?) , iron oxideaggregates (f er r i cre t e?).

Sand , as 0- 10 above wi th i ncreased c lay and l ess i r on oxide .

Sand, grayish orange pink (5 YR 7/2 ) , very fine-to fine-grained;angular to subrounded , well sorted ; quartz , sparse feldsparand opaque minerals ; dark yellowish orange (10 YR 6/6) clayclasts common ; iron oxide (fer r i cr e t e ) clasts present ; quartzgrains about 50% mil ky and 50% rock crystal , milky grainstend to be more angu lar indicating a mixed Piedmont f i rstcycle sediment and reworked marine sediments .

Sand , as 20-30 above wi th sparse gr anule s ize quartz and f e ld­spar c l asts ; olive gray , sandy c lay c lasts present - contactwith underl yi ng Chesapeake Group may be in this interval.

Sand , biofragmental , clayey , light olive gray (5 Y 6/1) , veryfine-to fine-grained , subrounded to rounded , moderately-to wel l -sorted sand with about 60% shell fragments , severalhigh spi re gastropod species , echinoid spines , bivalve shel lfragments .

Sand , as 40- 50 above ; 60 to 70%bi of r agment al , one coral pi ecenot ed .

Sand , as 40-50 above ; 80 t o 90% biofragment al , foss i l fragmentssmaller .

Sand , as 40-50 above ; 50 to 60 biofragmental .

Sand , bi ofragment al , clayey , light olive gray (5 Y 6/1 ) , veryfine- to medi um-grai ned , subrounded t o r ounded , moderately­to well-sort ed sand with 30 t o 40% she l l fragments ; quart z ,c lay , sparse glauconit e , phos pha t e present ; gastropods , bi­va lves , os t racodes , echinoid spines , diatoms .

Sand , clayey , light o live gray (5 Y 6/1) , very fine-to coarse­grained , subangular to rounded , moderately-to poorly-sorted ,with 5 to 10% shell fragments ; quartz , clay , phosphate comronto sparse , glauconite rare ; bivalve fragments , echinoid spines .

DEPI'H IN FEET

100-110

110-120

120- 130

130- 140

140-150

150-160

160-170

170- 180

180- 190

190- 200

200-210

210-220

220-230

230-240

240-250

250-260

260-270

- 2-

Sand , as 90-100 above , somewhat lighter color , less clay ,higher proportion of coarse grains , trace garnet and milkyquartz .

Sand , very light gray (N 8) , f i ne-to coarse-grained , angularto subrounded , moderately sorted ; milky quartz , feldspar ,trace ga r net and tourmal i ne ; quart z grains with white c laycoatin .

Sand , as 110-120 above with t race pyrite.

Sand , as 110-120 above with increase in c lay and coarse grains .

Sand , as 110- 120 above ; some dawn ho le contamination .

Sand , as 110-120 above with scattered 1/8 to 1/4 inch quartzclasts .

Sand , as 110-120 above ; some dawn hole contamination .

Sand , as 110-120 above .

Sand , as 110- 120 above .

Sand , grave lly , very light gray (N 8) , f i ne-to very coarse­gr ai ned , angular to r ounded , poor ly sorted ; mostly milkyquartz with whi t e c lay coating , feldspar , trace garnet ,10 t o 15% quartz clasts - 1/8 to 1/4 i nch .

Sand , very light gray (N 8) , medium-to very coarse-grained ,angular to subr ounded , poorly-to moderately-sorted; milkyquartz with white clay coating , f e ldspar, muscovite .

Sand , as 200-210 above with garnet common .

Sand , as 200-210 above .

Sand , gravelly , very light gr ay (N 8) , medium-to very coarse­grained , angular to r ounded, poor ly sorted ; milky quartzwi th whit e c lay coating , fe ldspar , trace garnet , abundant1/ 8 i nch quar tz c last s - 10 to 20% .

Sand , as 200-2 10 above with abundant contamination ; unwashedsample has abundant clay .

Sandstone , semiconsolidated , light to dark gray with r eddi shbrawn iron oxide stains , fine-to coarse-grained , angular tosubrounded ; quartz , feldspar , chlorite , garnet , muscovite ,lithic grains (phyl l i t e, schist , granite?) ; overall redcast to sample .

Sandstone , as 250-260 above .

- 3-

DEPTH I N FEET

270-280 Sandstone , as 250-260 above .

280-290 Sandst one , as 250-260 above .

290-300 Sands t one , as 250-260 above , sample finer due t o bit gri nding .

300-3 10 Sandstone , as 250-260 above , sample finer due to bit gr inding .

310-320 Sandstone , as 250-260 above , sample finer due to bi t grinding.

320-330 Sands t one , as 250-260 above .

330- 340 Sands t one , as 250-26 0 above.

Descr i ption of Cor e

)

)

COREDINTERVAL

13- 19. 5

30- 35

36- 52

80- 90

134-138 .5

CORERECOVERY

3 . 7

1. 5

3 .7

3. 4

1.3

Clay , sandy and silty , grayish red (10 R 4/2) toyel lowish gr ay (5 Y 8/ 1) ; thin sand layers - darkye llowish or ange (10 YR 6/6 ) , very fine-to fine­grained , angu l ar t o subangular , moder a t e ly-sorted ;quar t z , 1 t o 3% opaque mi ner al s ; i r on oxide s t ain­i ng ; becomes sand with minor clay near bottom ofcor e .

Clay and sand ; upper 9 inches of r ecovered core lightgray , s ilt y clay with t hin i nterbeds of very fine­t o f i ne-grained , quart z sand , weathers r edd i shorange to ye llowish or ange ; lower 9 inches of r e­covered core light gray , c layey , very fine-to fine­grained , qua rtz sand , weathers reddish orange ,subangular , wi th opaque miner a l s comron : beddingnear horizontal .

Sand , c lay , gr ayi sh r ed (10 R 4/ 2) t o yel lowish gray(5 Y 8/ 1) , very f ine-t o f i ne-grained , angular t osubangular , moderate ly-sort ed ; quart z , 1 to 3%opaque mineral s ; unweathered sand very light gray(N 8) ; disti nct change to domi nent yellow col or inl ower 1. 2 f eet of core ; l ower 1.5 inches of cor ec l ayey , ol i ve gray sand wi t h glauconite and she lls .

Clay , sandy , light ol i ve gr ay (5 Y 5/ 2) ; c lay , quartz ,rounded gar net , glauconite , seleni t e needles ; dia­toms , weathered (brown) and unweathered (whi t e)shell layer ; shell layer s tend to be c l ayey sand .

Sand , clayey , yellowish gray (5 Y 7/2 ) , fine-tocoarse-grai ned , angular to subr ounded , moderatelysor ted ; quar tz , t race garnet , 1-2% opaques , c lay ,fe ldspar ; thin layers of ilmenite and garnet .

)

COREDINTERVAL

138.5 - 145 .5

255-266

366-370 . 4

CORERECOVERY

1. 5

6.0

1. 2

-4-

Sand , c layey , yel lowish gray (5 Y 7/2 ) , f ine-tocoarse-grained , angular to subrounded , moder ­ately sor ted ; guartz , fe ldspar , ilmeni t e , mus­covite , trace gar net ; weak induration ; 6 incholive gray , burrowed (?) c l ay at base of cor er ecovered .

Sands t one and mudstone , weakly i ndurated , storedin 12 plastic bag labeled "cor e bit piece" , 1,3 , 4, 6 , 7, 8, 9, 10, 11, and 12; highest num­ber at top of core ; sample i n bag is described .Bag #12: Clay , s ilty and sandy , light brown(5 YR 6/ 4) , moderate brown (5 YR 4/4 ) , and lighto l ive gray (5 Y 5/2) ; quartz sand-spar se , veryf i ne- grai ned ; r ed hematite stains ; l ar ge (2"),broken quart zi t e c last ; sample appear s to beweathered .Bag #11: Sand , light olive gr ay (5 Y 5/ 2) , veryfine-to f i ne- gr ai ned , silty or c layey , r ed hema­t ite (?) stains , scat~~ granule size guartzitegrains wi th red hematite (?) coating; c lay , sandy ,dark r eddi sh brown (10 R 3/ 4) , approximately 1/2"thick .Bag #10: Sand and c lay , sand as Bag #11 witht hree 1/ 2" c lay layer s and f our 1" sand l ayer s .Bag #9: Sand and c lay , same as Bag #11, c laylayers not distinct .Bag #8: Sand and c lay , same as Bag #11 wi th fourclay layer s and five sand l ayer s .Bag #7: Sand and clay , same as Bag #11, c lay l ay­er not distinct.Bag #6: Sand and clay , same as Bag #11 with twoclay layers and three sand l ayer s .Bag #4: Sand and c lay , same as Bag #11, c lay lay­ers thin and discont i nuous ; sand may be somewhatcoarser in smal l lenses .Bag #3: Sand and c lay , same as Bag #11, sandcoarser grained .Bag #1: Sand as Bag #11, womewhat coar ser grained ,with large angular lithic c l as t s ."Core Bit Piece" : same as Bag #1.

phyl l onit e , white (N 9) to grayish green (10 G 4/ 2) ,quar t z , ser icite , epidote , carbonat e , plagioclase ,mi nor pyr ite ; car bonate as replacement gr ai ns andve i ns ; l ensoi da l domains of quartz i n f i ner -grai nedmatrix ; compositional banding il l def ined but pre­sent , consists of quar t z- r i ch and mica-rich bandswith i ll defined boundaries (thin section descrip­tion by J ames F. Conley) .

- 5-

GroUX;IC SUMMARY

Formational picks based on descr i pt i ons of cuttings and cor e and int erpre­tat ion of geophys i cal logs .

INTERVAL ROCK UNIT AGE

0- 42 Wi ndsor Formation Pliocene

42- 86 Yorkt own Formation Pliocene

86- 112 Eastover Formation Pliocene/Miocene

112-255 Potomac Group Cretaceous

255-350 Newark Super group Triassic

350-380 basement , phyl lonit e unknown

vi rgi nia Division of Mineral ResourcesEugene K. Rader , GeologistJune 9 , 1987