Loc. 287, Rd cut E side Thunder Butte Village - Rt & cutoff , south of Navarre Bridge in NW cor. NE 1/4, SE 1/4 NE 1/4. Sec 3 T14N, R 20 E, Thunder Butte Quad., Ziebeck Co. So Dako Cut exposes most of CAZ in Irish Creek lithofacies near top is the D bentonite. A-4683 - Two concretions with Protocerda masses from same horizon, about 2.5 +/- feet under the D bentonite and 10 feet apart along face. Note size consistency in each. A-4684 - Fossils from several layers in CAZ, It looks as though there is a bzzal berran layer, a layer dominated by Cucullzeus - the ypical Irish Creek CAZ fauna, and other scattered conc. However relationships have zre obscured because outcrop plucked of the more fossiliferous conc. - there may be no consistent order of distribution. On of few places easily accessible, where relation of D bentonite can be shown. A 40