Colo. Spzs locality 1. Section continued downward (street) in pieces Sec. 55-2 - from base unit 2 of Sec. 55-1 downward. 8) 2.3 Shale, lignitic, silty, tough, weathers brownish gray to gray in lower part 7) 0.2 Bentonite 6) 1.2 Shale, as above bentonite, lignitic. 5) 1.8 Shale, gray, grading downward to black, silty; lower 0.6 is black carbonaceous 4) 1.5 Siltstone, weathers light gray some yellow + brown stain. Massive coniferous plant fragments. Appears to be irreg. lenticular. 3) 6.5 Shale, partially weathered in upper half. Grades downward from soft gray clay shale to darker gray then into tough lignitic, silty shale base! 1.5. 2) 4.3 Shale, light gray wezy. grading downward into black tough shale from 0.8 to