t I I

GIOLOCICAL SOit¥11

ftDCIPAL PACTS fOR ClAVIn STATIOIS U Till CLIAIIIATD AID

ILACUOOT RIVD VALLEYS, )I)Jft'AIIA.

Dolores K. WilaOD

Open-Pile laport 78-103

1978

/ ,, ':'" -...;

Priacipal fact• fo~ p:aitJ etatl•• 1a the Cleaw:wter _.

llackfoot Uwr 'all.,e, IIDDt ..

·JatftNiuctf.oa

A aravlty survey vu .U. :lD the Clearwater _. Blackfoot liwr Yall.,e to

pi'Oricle :lDfonatlOD OD etructural relatloubipe aacl eukurface poloaJ ae part

of ~he 111 Pork-Avoa eaviroa.eatal ancl 1aacl-uee project UDdertakea by the u.s. Ceo1oaieal Survey aacl Missoula acl Powell Coulltiu, MoDt.a.

Data Co11ectiOD

Dur:lDa the au.er of 1975, 138 aravity atatiou wre utuliabecl with

LaCoste aacl ·ao.bers!1 aravity .. ter G-159. !he atatiou wre refereacecl to ..._

station ACIC 1200 of the Interaatioaa1 Gravity Staclarcllaation .. t 1971 (Defense

Happina A&ency Aerospace Center, 1974) at Llacola, Moat... A HCODclary ..._

vas established at Seeley Lake, Mcmtma, aacl tlecl to the L1Dcola baH atatiOD.

!be base at Seeley· Lake is located at the eouthweat eoraer of the elclevalk 1D

front of the Seeley Lake Post Office. The area covered by the eurvey is ehawD

:lD Fiaure 1.

Station elevations were obta:laed froa beDchurka ancl apot elevatiou on

1:24,000 scale topoaraphic aaps. Elevations are accurate to 1-2 a la areas of

1ov relief, but uy be 1D error by 5-7 a at a few statiou ia •re ruuecl

terrain. 'l'he reau1taat error ill the louper , aOMly ie leas thaD 1. 5 ~.

!/ Use of br•d UMa ta thta report is for cleac:riptive purpoHe ODlJ ad :lD

ao vaJ coastltutea eDcloraeaeat of the u.s. Geoloaical SUney.

1

0 •

. ,. . . •

• ·: . tt'-''-t--t-+.f-.%.~~9 l&&.!Y LAte! . ·.

. : •

. 2

OtANDO

. .. •

. .

. . . . . \ .

. .. . . . . .. . .

·. . .. .... · ..

0 .

. .. . '

o •

. .

• 0 . . . ; .

Data lecluctioa

fte &ranty .. ta WH n4uce4 by ..... Of a diptal COIIpUter proar• by

G. 1. a.-cl• aa4 a. a. Wahl (unpub.). Gravity •t•r naliap wn CODftrted

to ob .. necl araritJ utna the IDtenatioaal Gravity StanclarcliaatioD •t 1971

bue uluea. The Geodetic Reference Syat- 1967 fonula (IDtenatioul

Aaaociation of Geocleay, 1967) vaa uaed to COIIPute theoretical aravicy. The

data vere reduced to Bouauer. ao.aly values uina an aaa~ averap nck ·

deaaity of 2.67 .. /ca3• Terrain correctiooa vera ..cte by haDd t..,late throUih

loDe 8 of H•=er (1939) ,.aCl to 167 b by cliaital CCJIIPuter (Waah, unpub.). The

total ca.puted correction• ranaed froa 0.26 ... 1 at lrawa'a take to 11.11 ... 1

north of Nevada t.ke. Correction• vere •de for tidal effect• aa4 11-r

tn.tru.ent drift.

The principal facta for the gravity atatiooa are liatecl 1D Table 1.

Explanation of beadings in Table 1:

STATION IDENTIFICATION

LATITUDE

LOHGITUDE

OISDVED GRAVITY

STD. GRAVITY

TIIUtAIR

3

Gravity atation nu.ber.

llorth latitwle in clear .. •• lllDutu,

ad bunclredtba of llinutea.

Veat looaitude iD clear•••• lllDutea, u4

hundredth• of .tnutea.

llevatioo in feet (to convert to .. tera,

8Dltiply by 0.3048).

State where atatioa ia located (MDDtaa).

ot.aened aravity in llilliaala.

!beoretical aravlty.

Terr~in correction 1D llilliaala.

"4

•

UnatioD •• cunature conectloa ill

louper ..-.ly ill ldlllpla for ••-.cl ... r ... deaalty of 2.67 .-Jca3•

....... ilftiift <::::::::: IWia Yat.WI . . ~ · . . le ~. WJLIOI I"'

' ' ec•a•~r. a •• , • . . at'&~lo• t.oCAtiDII O"SOVCD ' COMIC! I D .. ""'II JoPTlrlCAIIOII l.aftiiDI t.OIICI!'UDI ILlY. ''· GltAYUI '"· ... ,. tlltlal• racc-ua ....... .. w IIOM&S.I

CltaYfr.s.a•tiAII tl9 ......... 2 •••• GhYtY. IVI'ot •' at.to •IU 42.21 4$24.0 .. ,. ttftl,9.SO. •tiOtl2.tO 1.57 42S.JO •ISle II •UieU C:Ravtr. i¥002 47 ltell •IU 42e7J 1101.0 "' tiOl04e2~ •t,~l2t.7t .. ,. ., ... •20tel• •ISSe21 GltlVTY • IVftOJ 47 11.44 •UJ n.n tue.o .. , ••••••••• •tl0112.2l 4 ••• , ..... •IU.OI ..... u c:aanr. 1¥004 47 11.11· ·•IU Ue61 4622.o "" tlolt2.6J •tlot32.o7 •••• • , •• u •••••••• •Ute 74

GltaYTfe ••••• ., 21.11 •IU , .... 1264.0 "' ttOl42.67 •tiOIJI.tl 4 ••• • ••••• . ...... .., .... Gltavtr. IVOOI u ao.s• •IU a•.•• . ., ... lit .• t~Olo-le'-2 •tiOUO.tS '··· 1St., ., ... ,. ••••••• G~tavtr.r,aatKASJ! .. , ttlo.tu.n o.oo C:tta,rr.a.ur.Raac .. , tiQ404.92 o.oo

,, .•• 7 GII'AVTY. 1¥007 47 ..... •IU ~' ··'' ..... o "' tlnlt2.t7 •tiOtt7.42 .. ,. •Ut.41 . ., .... c:'''''· 1¥001 ., ... ,, •IU 26eiS tns.o .. , ttn3•s.l2 •ttott7.os •••• ..... 0 •147.U .. ,, ... , Gttavrr. avoot .. , ..... •IIJ n.tt tJn.o "' •• 1'312.2. ········'4 ··'' 407. ll. ......... •• , •• u C:ft&VTYe IVOIO . , ..... •IU n.n uso.o .. , tlnll7.,2 •tiOtt•.•l .. ,. • .... J • •IIJ.u .. ., ... c: .. ,.,,. IVOII .. , • •••• •IU 21.11 un.o "' tA~l52.62 •tiOIIS.ot 4.11 451.10 •• ,,.ol ..... 07 GRlYTY. 1¥012 .., u.u •IU 21.42 '"'·0 "' t8ot•t.J2 •tlntt7.0I ••• 1 712.74 -an.u ... ,.,.,. c:•avtr. IVOIJ 47 '·'' . .,, ..... , uu.o "' 910)67.14 •tiOIU.tl 4e71 ., .... .. ,. .. , . .... ,, C:R&YfY. .. ,. ... ., .. ,. •IU .. . ., uu.o .. , , .. 0)19.6) •tRC1109eS7 1.21 Jti.U •141.11 •••••• 11 c:•avtt. I YO II 47 ••• o •IU U.21 42~4.0 IC,. , .. ,_,.,.oa •t'OI09.SI 1.41 ns.u ., ..... ........

\II C:tt & VTf • I VItti 47 1.21 •IU .... 1 4211.0 .. , t&OJI4e6l •91010let0 ••• 1 Jtt.lt ...... , •171.14 cttavrr. 1¥017 4'1 t.o• •IU u.ao 4112.0 "' 91o311 .ot •980IOtt.OI ..... ,., ... •IU.tl •175.04 Cit& tTY. I YOU "' •.u •Ill 19.17 4Us.o .. , .. .,., .. ., -tllottot.ll a.u Jtl.t4 ... ,.,. ... , ... GltaVTY. I VOlt 47 •.o2 •IU 22.11 4211 •• "' 9lii)J19aU •9NOIOt.OI a.o1 402.47 •147.12 • •UJ.72 C:'aVTYe IY020 .. , '·2· •IU u.n J92o.o .. ,. tln4oi.IO •tlotot.4o .. ,. )61.54 .. ,. ... ....... C:JUVTY • IVIJ21 ., so. at •lU u •• , 4045.0 .. , 911'402.4• •910tiS.21 a.os )10.29 •Ute II • •170.,1 • C:lt a VTY • LAJf;Ustt -·· .. , , .. .,., .. ,, •• o •

CiP.&VTr.t,AkEUSI .. , 910404.92 •••• CiRaVTY. I YOU . , 20.1) •IU u ••• .., .... .., tAftJlJ.~I •910~10.24 ,_,, .... ,. •111.12 . ., ... , c:uvtr. I YOU ., ••••• •IU ,..,, 41Jt.o "' , .. ., ~0,,.1). . .. ... ~.27.21 , .. , Jlt.tl •142.41 -na.•• C:R&VTY. I YOU 47 21.54 •IU ll.l4 ... .,.o .. , ••oJ•o.t~ •tllotJJ.JI s.u •n.ao •lst.4t •1•2.11 Gllavtr. IY02S .., tt.)O •IU , .... 4Uo.o "' ttl0)19.9l •ti0121.tt 1.22 426.11 •116.20 . .. , .•.. c•avtr. 1¥026 47 ao.u •IU u.n sus.o .., ••• ,.,.,. •tiOIJ0.4) 1.47 . .... ,. -~····, •ISteJO GRaVTYe avon 47 11.41 •IU , •• u un.o .. , ••oJll.t4 ·••ot26.27 ... , 447.Jt •UJ.70 •Ut.ll t:•JVTYe I YOU .., tl.f'2 •IU , .. ~, ... .,, .. ,, tloJ7o.-• •9101125•'' •• so •n.ot •UI.41 •111.50 CiRaliTY • IV02t 47 16.11 •IU )6.54 un.o .. , tloJll.12 ·••~•2•.•o '·'• 444.U •uz.n •1Ue4t C:FI&VTY. SVOJO 47 u.to •IU u.•s 429 •• 0 .., tiOltSe21 •910120.57 . 2 ~0· .. , ..... •l·t1.14 .. ., ... CiRavtr. IVOJS 47 u ... l •IU n.s• ••n.o .., 910367.0) •910120.41 " le70 .... ,, ..... , •ISt.JS GltlVfYe avon 47 12.,2 •lU ,,._,. uu.o .. , t80ll4.40 •9M01l9e)t .... 442et'1 •162.09 •IU.U Ci~aVTfe avon. .. ,. "·" •IU n.u 4929.0 .. , ti036Je4t •9~0111.61 '·'' ... ,., •ltt.52 •tSM.tt GAlVtY. IYOJ4 • ., u.u •IU l9.60 ••se.o "' ti0367.l• •91011···· ••• 4 .,. ... .. ,,.,. •au.•• CUVfYe IYOJI .., u.s• -au •o.u IOtleO ~~~ 910)55.21 •tiOill.tt I ell .. ,. ... •ns.o• • •114.11

Table 1. Principal facts for gravity stations in the ~ltarwater and Blackfoot

~-- .. "" 11~1 r

.,.~- . ucatt• Oallti!YD COIIIICtiMI ~ ,.,..,,ncan• ...... tiN .... "· Cll''"' •••• ••• IIIlAS I rail• AI It ...... --~~ . . •anY. .,.,. • , jl.ll •IU 41ell .. ., .. . , ... ,.,.,, ..... ., .... .., . ..... ••••••• . ...... ••nr. .,.,, . , .... , •IU 41e4t •••••• IIY ... , ........ , ...... • ••• .,. ... ....... ..... ,. Panr. . ,.,. ., ..... •tU lle44 .. ,, .. IIY ••• ,., .••.••••••• 1, •••• 426.14 ....... . ..... , Clt&ttr. . ,.,, ., •••• •IU n.JI . ens.e "' tlleJtJ •. 27 •tlotu.s7 ••••• • ••••• ...... , •ua.n •.. ,,. ., ... .,

'··· •UJ JJell ....... "' . .... , ............. • ••• nn.sJ •142~" •ts•··· CltlYTY. lf041 ., .. , . .... , .... , ...... .. , ••••• , •• , •910111.41 . ... 119.10 •142.1t ..... ,, .... .... ,,. IY042 ., ••••• •IU l9e7t 40at.t .., 9104tt.40 ......... 21 .. , ., ... . ., .. ,. . ..... , CltaVTt.t.UIItAII .. , tt0404.92 •••• GltaYTT 1 t.Pf.8ASI "' 9104.0.4,92 •••• .. Cl&Y'fle I YOU ., n.•• •Ill Jl.tt ... , .. "' 910400.7, •••••••••• .. ., Jlo.ot •nt.u . ., ....

'Cit&Vt'le IYU44 ., ., ... •IU ''··· •••••• ., 9IOJII.IJ •••••••••• •••• .... ., ....... .., .... GltaYTT. ., .... ., ..... •lU t4.tS uss.t IIY 910)71,71 •••••••• ,, •••• 421te21 . .... ,. -no.•a c'''''· lf044 ., ..... •IU 21.40 t1941.1 .. , 91oJ•J.t) •91012J.tl '·'' 4so.n .. ,. .... . .... ., CPaYtle IY047 '' u.ta •UI , .. ,. sooo.t .. , 914)~2.01 •910121.91 ,_,. .., .... •IU.91 •ll•··· . Cltavtt. ' IVUt s:aso.o .. , tiOJU.II •••• GltiYTT. 1¥049 . , ..... •IU "·''' .,. ... .. , 9POI14,9t •tl0127 •• 1 ... ., . .,.,, •191.11 ....... C,.avtt. IYOSO ., ... ,. •IU ''·24 suo.o "' •• ,,,,,,., •910121.14 leO I letl.tt ....... ••••••• Gft&VT'le IVOtl ., ... ,, •Ill 29eAI •••o.o .. , 9toJe2.Jt •9aoatJ.Ja .. •••• su.n • •••••• . .... , . G'IVTYe AVOS I . , 11.29 •IU Jl.49 nu.t .. , tlft)67,Jt •910122.16 '·" ..... ., •1Ue2t ....... caanr. I YOU .,

"···· •IU II.Jt 4900.1 .. , ,,,, •••• , •910121.41 J.lt ... , •• 4 •Ute II •161.11 • GII&YTY.&,aJf.IISC .. , 91ft404,t2 o.ot CftaVTY.t.I•C"ASC .. , 91fU47,J5 •• oo C:R&VT'l·e IY0$4 ., '··· •IU 27.11 1921.0 "' 910411.96 •910110.14 .. ,. , ..... ........ ••••• 19 CUVTYe I VOSS 47 '·" •IU 29.11 ••••• 1 .. ,

910404.46 -·~······· • a.u JU.t9 ....... • .. o.u CR&Vty. IYOS6 ., •• ,9 -au Jo.so 41Jiel .. , ttocoo.J2 ·••••••·•' •••• , ..... •tca.oa ... ,.,. caavtr. I VOl? . , 4.11 •IU lie !II ..... 1 "' 910151.21 ........ ,, .. ,. .... ,. ..... , . ....... CUtt~VTY • avon ., s.u •IU 2 .... , -., ... 1 .. , 9toJn.sa •tl0107et7 le09 . ., ... •U2e29 •lllleU• CRanr. IVOst ., 4.t-o •IU 21.11 4tu.o .. , 9llolll.ll ... , ...... , •••• '"·'' •1'2 • ., . ....... cuvtr. I YOlO ., .... •IU 24eA7 4041.0 .. , 910402,11 •••••••• ,, 1.21 J7t.91 •Ut.at ....... caavtr. IVOil . . , '··· •liJ u.t9 4001.0 .. , ••o•oz.7t ·••••••·•• • •••• , .... •tn.u •ata.o7 ... ·····"·-caavtr. IYOAI ., J.o4 •IU 21.07 4640.1 "' ••• , ••• ,, •tlfti04.1t .. ,. n•.u ...... , •llt.u· Ct~avty. IV06J ., .... •IU "··· ...... .. ? 9IOJ!! •• J •9101011 21 1.91 417.21 •• .,.2, ...... , GP.&VTY. 1¥064 ., .... •Ill U.71 , ..... "' 910406.17 •910100.11 ..... . 161.21 ··sU.74 ...... , CttaVTY. IV Oil 41 a.oa •IIJ n.u 4s••·• "' ... ,., .. , .......... •••• 429.21 .. ., ... •110.14 GRaVtt. IV061 ., •••• •UJ 2'·" ., .... .. , tloJ•o.ttt •ttoaoa.ae •••• .., ... •a•a.zt ..... ,. GRlYTY.t.PCI&SC .. , ,, .. ,.,.,. •••• GJiaVtlel.liiCIIAII "' tto:U7,JS o.oo

'""'''· I YOU ••••••• •IU ''·'' . ,. ... "' 914174.11 •9107t4.74 4.17 . .... , ....... • •••••• caavtr. .IYOII •• 17.91 •IU lieU •no.o .. , ,,,,,, ....... , ..... , ... 40iel4 ....... •&19eJt

Gl&Vfte 1¥019 ....... •Ill 19ell 4217el .. , 910J12ell •tl0?tle4 • . .. ,. ...... • .... u . ..... , . caa~n. . .. ,. ., •••• •lU a.u ••••• 1 ., till, •• ,, •••• , ••••• ..,. , ..... . .. , ... ·n•·••

.'

'

. ( ·?·~- -·~·-

.._~ro .. .

eoiUC'tiNI .... Ill le&ll'tltiCA~J .. U~IIIUC ...,."'" ...... •• CPAYITI no. ••· ... I. nr.c•AII ...... .. .... a•o•aa.r

laa.n. .,.,, ., •••• •UI •••••• . ., ... ., ••• ,, ••• , ...... 1.1t .. ,. 401 ... •147.11 .., ... , '. .CtaYtY. IY071 ., a.aa •tU ,_., ""·'

.,. tiOJI2e71 •tl0t0le7t •••• ..... 1 ..... ,. .. ., ... ·c.tntT. . ,.,, ., '·" •111 '·"' •••••• 111' ··~··'··· ., •••• 2.21 .... ,.,..02 •141.11 •&70 •• , c•avtr. IY074 ., a.sa •lU so.se 4ftS.el "" t•ftlt3.77 •91«'101.71

. '·" ns.u •Ut.tt •167.46 cantr. .,,,. ., l.tt •IU II ... , .. ,.o "' ti04t2.11 •tiOI02.tl •• 76 , .... •ln.u •162.&4

Clt&Yffe 1¥076 "' .... •IU 11.11 , ..... .. , ·····~··· •••••• 2.71 1 •• ., ...... •Ut.u •16le20

""''· .,., ., 1 ••• . •IU u•.z• .. ., •• o .. ,. t•0407e76 e9MQ.b2elf 1 ••• ,,. •• n .. ,.,, •162.12 c'avtr. ""' t7 o.74 •IU tt.n ••u.o "" tloto7.2t -~oa.o• 1.21 1.1.46·· · •UI.ot •IA2.U ChVTT. .,,,.

"' •••• •IU "·" Jus.o .. ,. tt04Ut.2S ....... ll.•t '·" ·"·'' •tn.n •U0.47 GltaYtr. IVOIO 47 o.as •IU n.u JUI.O "" •••••~·'' •t•~•oo.at '·'' .. .... •an.u •l6lelll CttaVTT. I YO IS ..... ,. •In u.n 1122.0 ..,. ·~0407.62 •9"ft7t9.10 •••• JSI).U · ··I:Uell .. ., ... CI&YfYe avo•2 •• 11.21 •IU 24e4t 1172.0 ,.,.

t•n•o~.aJ -•~~'''·II •••• J•t.oJ •IU.JO •160.16

'''~''· I YOU .. . ... , •111 25.111 nu.o .. ,. ''0412.41 •••• , •••• ., o.n ,. ... , •Ut.n ........ ,,.,v,.,. IY014 46 ..... •IU 26e2J , ..... "' •••••a.oa ·•••'''·'' I ell na.n •IU.I4 .. ., ... caanT. IVOIS 46 SJ.J4 •IU 2'1el0 •us.o .. , ········2 •• ,.., ••••• . ••• 2 ...... Jto.u •au.oo . .. , .... CPaVTT. I YOU .. ... ,. •IU 29.51 ,. .... "' ti0417.J4 •tt.079S.G6 ..•. ., 144.20 •U6.06 . .... , . CJII&'ITT. avon •• sa.n •an 27.tl 1725.0 "' tlft4t2.6J •tAo7~s.o• o.st uo.u •n•.a,. ••••••• , .. ,,.,_ 1\"~11 ...... ,. •IU u.n nu.o .. , ttft40~.-· .,~~'''··· s.u 152.14 •12t.2J .. ., ... ''"''· IYOit .. "·" •IU 24eU , .... .. , .t~n4ol.IG •tlo7t2.42 ••• 2 ua.n •nt.ot . ..... , GhYTY.t.I .. ChU~ .. , ... ,.,.,, .... " ' C"aVTr.LINCIAS'! .. , tiiOJ4'1.JI •••• Cfta11'lT. SVI)fO

46 "·'' •IU I.Ol .,.., .. "' t~oJs,.sJ •ti07t2.'t .... ~ ....... ... ,.u ••••• 27

CR&VTt. avo• a u ss.s2 •IU J.ss .,. ... .. , •~o,st.•J ·••n,,a.•o .... 405·'' ..... 12 . ...... • CI'&Vl'y. svou u ss.•t •IU '·" uu.o "' ••ol•~.~~ ·•~~7•J.tl o.AI 405.2t •S41.Jt ••••••• CJI&\"fT. IVOtJ .. 17.27 •IU •••• .. .... "' • •••••• s ••••• ,.5.14 e.sa . ... ,. ....... .. , ... ,. . . • '"'"'· ., ...•

44 ''·" •IU '·" •ns.o

.. ,. tiOJ''·'' •••• ,., •• 2 •·•a , ... .,, •142.12 •171.11 .. GUVTY. IVOfl uss.n •112 ••••• - .,,, •• .. , ••• ,,,.20 ., •• ., ••••• . '·" . ..... •ua.at •liJ.ot CJIIaY':Ye ., ... .. . , .. ., •112 ''·"

., .... "' ........ u ...... ., •••• , . •• 71 .. .. , . . ...... . . ........ ·· CRIYTY. avon •• ss.n •I t2 14e 7S .,., .. .., .. ,,., ... -·~''''·"' 1.26 •so.JI •U0.2t ....... 't Glt&YTY. IVOtl 46 so.u •112 sJ.n ...... "' ,,,,, •• ,, •tjot•s.ss I.,. ""'·" ..... .,. . ....... .t c ... ,,. IYOtt 47 ••••• ...... teoJ\7 .... t,;o•'•·•t . ., .. , •152.10 -au n.u .. ,. u.u •24•··· Gkanr. awaoo • •••• 41 •IU 41.12 4554e0 .. , ·····4··· •t807tJ.41 a.ta tn.u ••••••• .. ., ...

CftaVTY. IVIOI •• so.•• •112 ..... .,,. .. "" 910)4 •• 10 •tC0716.21 •••• • ...... -uo.u .. .,. ...

Clt&VfT• IY102 46 4t.AI •IU o.u """·' .. ,. .~,, ••• ,. •9607~·.·· · ••• 2 41'1.20 •Ul.42 .,, .... , GUVTYe IYIOJ .. , 41.11 •Ill , ... 4111.0 .. , ttoltt.IJ •t&o7ta.aa '·" t21etl •u•.•• .. .., ... GlaYTt. ••••• 41 ..... '!'IU .. ,, .,., .. .. , ••~•~• ... •t•ottt.a7 •••• .. .... •UJ.u ••••••• Glt&YtY. I VIOl .. . , ... •IU ... , 4tto.o .. , ••• , ••• .,, •910774.06 .. ., ..... o . ., .... . ...... Glt&VtT. 1Yl06 ... ... ., •IU 7.16 lttJ.t .. , tiOIIfe'll -ti0761e21 a.ot , .. ,. .. , ... .. , ... ., . GRaYff.LIIC8A'IC ., • •• ,..,.JS •• oo GaavtY.LINC~AII .. , tiOJ47eJI o.oe

~aanr. .. ,., ., ••·aa •IU llell ...... ., • ........ •tlt111.11 '·'' ,. .... ....... . ., .. ,. 7 {

I

• .., ............. Kn ...... ,.

ltlfiOif t.oeltl .. ..... ," ~ICtiDd .... ," leltltlriCAtl• UtltiDC t.o•Git- ..... "· CltUl7t •••• ••• ....... rar.c•AIIl ....... ...... bOQI.f

caam. ..... ., ..... •Ill n.tt • ••••• .., ,, ............... ,.,, a.tt ,,.,a ...... , .., .. ,, c•anr. ..... '' n.el •IU .... , eus.e ., ··~·oo.t• •••••••••• • ••• ....... . ...... , . ...... .... ,,. .,,,. • , Ue41 •tU ,, .. , 4 ..... .. , ••• ,, •• 12 ••• ,.,, ••• .... ••o.•t . ...... • .. a.ae

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• .. •

lafenaeea •

. Def-- llapptq Apaq Aenapace C..ter, 1974, •r1• a.1atlw CrnltJ a.fer•c•

.. twl'k, IIDI'tla Merica, Part 2: IIIUC lef ..... liD. 25, vltla • ..,1_t

.... tiD& araritJ valuea to the llltenaattoul. GrnltJ St• .. r•taatloD .. t

1971, 1635 p.

a-r, Stpund, 1939, 1"erra1D correctt~for aran.ter atattou, GeoplaJatca,

Y. 4, DOe 3, p. _184-194.

latenattona1 Aa.octatton of Ceodeay. 1967. Geodetic lefer•c• s,.t.. 1967.

JatematiOilal Aaaoctatton of Geod••J Spec. .... ao. 3, 74 p.

'