Page:Field Notes of Junius Henderson, Notebook 2.pdf/88

 occupying the crest of the ridge and the west face, while between it and the lower Dakota conglomerate were drab and greenish clays, quite hard. Dakota conglomerate coarse. Medial Dakota clays covered. “Dakota” is 30 ft or more sandstone on top, then 50 ft sandy shale below, then 50 ft black clay shale, then 60 ft hard sandstone and conglomerate with a tendency to form two ridges. Near base of upper sandy shale are calcareous bands containing some oyster and Inoceramus as at, with vertebra. S side of gulch3 or 4 miles north of where we entered foothills a ditch tunnel exposes Dakota- Morrison contact where a massive, light colored iron stained sandstone rests conformably upon sandy shales, variegated, yellow, greenish gray and maroon. Lower are greenish shales, underlaid by limestones. Here, as further south, the limestones form highest crest of first