Loc. 51 East bluffs of Little Oak Creek - Sec. 7, T. 19 N., R. 27 E. - numerous small exposures on toes of spurs etc. (see above) Exposure A. - Toe spur in SW ¼, SE ¼, NE ¼, sec. 7, measuring up from lowermost shale exposure. 1 5.0-? Dark gray, silty shale, blocky fracture, brown Fe stain on fracture surfaces. Grades to unit above. Unit weathers grey, somber color-except where washed over 2 E.B. 9.0 T.C. Shale, silty, gray mottled with light yellowish gray and ferrosite. Some brown Fe stained crees which are a clayey silt-these begin 3' above base-zppcr lenticular. Ferosite concentrated chiefly in lower 3ft and in band 4.5 to 7.0 from base. At top is zone scH. (flattened) void concs, ls. caves-some pucky- which weather gray to brownish gray, thick silty gray jzchats-usuel D.nic. type, are 1 to 1.2 thick up to 2.0 across. Unit weathers light gray with yellowish splotches 3 2.5 As below, becoming siltier, little ferosite. D.nic. concs in A399 Lot #1-2 small D.nic. concs in piece 43