DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY

88°37'30" EXPLANATION

~ Pennsylvanian, probable Abbott Formation. ~ Sandstone, tan to reddish, medium to fine

grained, minor siltstone and shale, cross-bedded or ripple-marked in places

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INrERIOfl-G EOLO GICAL SURVEY, RESro~. IJA - 19B.5

For sale by Branch of Distribut ion. U.S. GeolDgical Survey, 1200 South Eads Street, Arli~n. VA 22202

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