Page:Field Notes of Junius Henderson, Notebook 2.pdf/109

 Gray s.s., not quite so friable as last (?), massive, strongly jointed vertically in places, forming base of vertical cliff-26 ft.

Yellow s.s., ripple-marked, forming upper part of face of cliff, less massive and sloping away above-37 ft

Clay, covered in most places--3 ft

Blueish l.s., hard, weathering rough and rather conchoidally on surface if composed of flattish crinoid bases an inch in diameter1 ft

Clays and limestones interstratified--45

Gray friable ss8

Clays, limestones and sandstones, greenish and reddish below, more grayish above all crumbling readily     about100

“Dakota” basal s.s. and congl. Dakota medial shales, black below, light brownish above with and  in upper half. Dakota upper s.s., rather slabby Niobrara ((The following crossed out “N of Table Mt. The Jurassic strata bend away for miles eastward in bluffs much resembling the Chalk Bluffs