Below ss slope wash obscures, but patches red clsth as far as 10 ft below, then green begins Resume of hogback geology between Weaver Gulch and Dutch Creek :- Clays between 1st Glencairu sand and Dakota At WeaverGulch 4 clay beds present, separated by sandstone units. None of clay beds thick, lowest has bentonite-like layer above which clay good, below which silty + shaly. This bed is probably main refractory clay bed. It pinches out a short distance s. of where section 1, AIN-49-08, taken. Sandstone beds betw. clays all relatively thin here, but south along hogback they thicken and locelly coalesce. The Most variable are sandstones 0, and -1 (seep.1 this ntbk). O locally increases to 25 or 30 ft near s. end hogback, coalescing at s. end with 1 and -1 to form solid unit of ss. The two clay beds above -1 are persistent, varying in thickness from a foot to as much as 5 feet. No good exposures, but well-defined (double) bench on back slope - clay clay, some clinty frags local plastic muck Dakota -2 One of thickest zones above -2, showing plastic muck, runs N ts of 19, AIN-49-08 Between 6 and 9 on AIN-49-06 the main refractory clay bed comes in and locally reaches 2.8 in thickness. This is its best for hogback segment in question. Locally it contains gray flint clay, somewhat silty, at top. Pinches out to N and S between sandstones 1 and 0. 8.