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1_ <br />SMOKY HILL LIMESTONE MEMBER <br /> Consists of limestone and shale units <br /> with total thickness t70 feet. Several <br /> -"-' rnsistant 1-3 foot limestone units <br /> appear within the scale and fissile <br /> 80'+ limestone. Many black to yellowish <br /> z orange clay seams, [ovally heavy pyrite <br /> O , <br />` with fetid odor on fresh broken surfaces, <br /> ~ easily distinguished between Ft. Hays <br /> member by total SiO2 and CaO content. <br /> C `~zse-= -.- Abundant Inoceramus and Baculites <br /> a index fossils. <br /> w <br /> <br /> __ <br /> <br />~ z <br /> Transitional zone marked by increase in <br />U 9' limestone & total CaO content, reduced <br /> clay seams both in number and thickness <br />a FORT HAYS LIMESTONE MEMBER <br />U _ Medium-It. gray, dense, hard & brittle <br /> ~ limestone layers range in thickness <br /> 35' ® from I to 30 inches separated by thin <br /> seams afblack-yellowish orange calcareous <br /> clay disseminated pyrite and pyrite crystals, <br /> B usually associated w/ clay seams. Inceramus <br /> fossil fragments abundant. <br /> <br /> Transitional zone, very hard dense arc- <br /> -3' : •~ • • * •- ' <br />. <br />. novenas limestone. Heavily bioturbated. <br /> z <br />'T <br />' <br />i~ •' ' ~ ~ <br />CODELL SANllSTONE MEMBER <br /> O T • Medium-fine grained massive sandstone, <br /> a It. brown to gray well rounded quartz <br /> C • G1• •• - <br />25'+ grains wlsilica aad calcareous cement. <br /> O , <br />~ Heavily bioturbated io upper part a~th <br /> m o ,' <br />- - worm borings, few inclusions of dark <br /> d - - gray calcareous clay. Possible unconformity <br /> z • between limestone and sandstone and <br /> v _ sandstone units. <br />State Location <br />---- - i <br />.-.. ~ <br />C oloratlo j <br />~~n..~, f <br />L_.-~ ___.__~._ Scale: 1 inch = 20feet <br />e: Holnam Geotet~tnical Senrices Department <br />