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0 <br />m <br />r w = a <br />~. ~ DESCRIPTION <br /> o: W <br /> V- <br /> ~~~ <br />.. AengLq Se thlesmeae bet.ean 1000 ant <br /> =_ - ~ <br />$ 1500 C4 the I~0. 1GOa4L1Q1 0001O:m- <br />~ <br /> - <br />ewe„y Pe <br />§ ably owcl.f0 tIM lmide 9pL. <br />mtt- <br />eC W <br />dd <br />d <br />db <br />hal <br />~e~" <br /> _~ .a <br />e <br />e <br />qay s <br />e. <br />g <br /> 33 <br />I[ mote tam m'gcay sandstone <br />s~ mal <br /> <br />- - = ~ - ~ , <br />, <br />the tera lOmatlee outeacLs mstle- <br /> _ ~, ..r vnt M tti sder asw - . <br /> ~ ---. <br />~ <br />~ <br /> . ~ ~ ~ <br />~ ~ ~ <br />~ <br />LEYls SWLLE . <br />~ <br /> a r==_= -- = <br />_ _ _ _ <br />~ coMOtmeble with tM uMerlying .ate <br />~" <br /> ~ _ _ _ _- <br />~ g overlying ~fo+metions, the Lewll shale <br /> r <br />_ __ $ - 1s primarily dark-grey Lo bluish-grey <br /> = S mrina shale. Outcropping due north and <br /> = I <br />S$$ south of the permit arca <br />tha L <br />i <br /> <br />- _ ,. <br />ew <br />s <br />Shele ranges 1n thickness between 1500 <br /> = ~ - ~ ~ au4 1900 tt. <br /> _ ~- _ ar o.+~r ~~~ . <br /> I <br /> a <br />w --- <br />J <br /> <br />e d <br /> <br />` .m ..~ ~¢c laaarla+ <br /> ~ - . - -_._ .~_ ° Caultti+4 OC Lttn~edded edvele, Y:- <br /> ~ <br />_ ,,.er ar areee aed yar $ step. and opal, the W3111me Pock <br /> :.:,ar <br />~ <br />W _ <br />a Poarotion ra~gn !n thiolaess between <br />. a ° <br />~ . <br />. r <br />a.. 1100 ad 1000 tt. thick. It cantadns <br />m ~ „_., tM ~ aM middle opal geeeupe o! <br /> ° • <br />? <br />~ <br />` <br />: <br />- <br />• <br />. <br />x.« <br />< <br />` <br />: <br />~ ~e <br />, } X <br />? <br />i ~ <br />. <br />t;:: <br />{ <br />~. ~: <br />; <br />, <br />:: <br />:: <br />: the Yasavecda Ltaup.as vsll ss tha <br />' <br />~ <br />0 o i ~ ` <br />-J <br />----~ <br />- pco-1~t <br />lwenty !(1108aMsenne <br />meibrx <br />. <br />.~ « ~~ ZV <br />~ <br />wea <br />~ S . <br />~ 111IA tbtk Wtrsoq at thn adm <br /> ~ ~ ' <br />~ <br />f e <br />V yFks~e w. a ..,,, <br />~~ <br />w.'e.ae .~ <br /> <br />a - . <br /> <br />3 <br /> <br />.. <br />a: <br />'. <br />° HJ <br />fBRMATIOM <br /> <br />u a <br />!~ Approaiemtely 1500 it. thick,.the <br /> ° ~.~~: ~::.:: ~:::.::::. ~: ~.:::: ~.: lower two thirds of the Iles Formiton <br /> ° <br />~ _ - - - <br />- - - consists of masstve ledge forming beds <br /> _ <br />_ _ _ ~~^^~ of light-brown, 11ght-grey and white • <br /> <br />_ _ _ _ vwrr .+ - <br />r <br />00 <br />° <br />°" <br />~ ® _. <br />aa~stone lnterbedded~wl th lessor amts. ~ <br /> <br />_ _ <br />_ <br />_ <br />_ <br />_- i <br />-.of ~saMy-shale-an?eaal-TOe uDDar third <br /> - - _ <br />- <br />- contains a shale sequence capped with a <br /> ___ _ _ _~ - cliff forming sandstone. The Tow Creek <br /> . r =vr-z ~ ~ - <br />= ..... and the T~~routbCrK saondstone mm~ibe~~ <br /> _= _ _ _ - <br />_ ....~ s.+.. v.., t~ the tap of Lha }ormation. The Iles outcrops <br /> _= ~ <br />e.r r.~« south and northeast of the mine. <br /> ..~ <br />p <br />_ _ <br />~ ~ O <br /> _ <br />~ <br />_ ~+ MIWC05 SHALE <br /> r _ _ ~ =-- = = <br />react ~ TLe Marcos Shale,which fs about 4900 <br /> _ <br />= = - - - _- - -_ <br />~ - <br />- <br />- - ~ ft. Lhick,eoMOrmebly uMerltes the <br /> ~_ <br />- <br />_ Iles Fanaatton end overlies the Dakota <br /> _ - - - _- - - <br />` <br />~ SaMStorw~. Consisting chiefly of hone- <br /> --,-, <br />_ ~-~ ± T,-= <br />~ <br />=_~= a...r..+e«rw <br />r=_~~z=~L~- geneous dark-grey shale, the Marcos <br />Shaia outcrops rwrtheasL and south bf <br /> _ <br />_ _ - - <br />- Saeeta II. <br /> s r- _ r <br />.... <br />- -_ ii~~ <br />-C~ ~ i <br /> ^ <br />~ <br />~.. <br />i <br /> <br />Generalized Columnar Section of the Seneca II Mine Area. <br />