W-28 Locality in first bentonite pit N of Bentonite Rd, intersection with Atzdz Rd abou' 1 1/4 miles Newcastle bentonite Top of cut, I 3.0+ Wash on weathered outcrop of black shale + bentonite H. 1.0 Silty black shale grading to shaly siltstone locally G 0.3 Black shale, F 0.35 Bentonite E 1.3 Black shale becoming sandy at base, with some sandy (lg. sh. in b2s2l) 0.2 D 4.2 Sandstone, fine gr. silty, massive with strong current x-lin. on small scale (or huge ripplemks?) C 3.5+ Shale, blocky, dk gray at top grading to mottled gray and light gray bentonitic shale