A.P. notes: Willow Creek to Rainbow Creek (B.O.V. 35-65) 1) Clay beds at top of Dakota. Double pattern again. Gzncros 6' to 8' Sandy Clay Gray plastic clay SS DK gray clay [illegible] bass silt bed. Both beds plastic finely silty clay. Zone is thicker than at sand & Gravel Con pit on N end hogb S of Plette. 2) Main clay bed in with basal bentclay on rip surface. Bed poorly exposed but about 5' thick. Strat above it are several other clay beds forming swale between it and SS below Dakota clay. Not known how many clays here, but obviously some thick ones. Represent lith clays. SS at E side swale (one under Dakota clay) has clay split 5' 3' dk gray plastic clay. 3' Below (strat) main bed, split is in-silty, plastic gray clay & Siltstone, 10 to 12' thick. A really unusual development of