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

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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 diameter------------------------------------------------1 ft

Clays and limestones interstratified------------------------------------------------------45

Gray friable ss--------------------------------------------------------------------------------8

Clays, limestones and sandstones, greenish and reddish below, more grayish above all crumbling readily about----------------------------------------------------------------100

“Dakota” basal s.s. and congl. Dakota medial shales, black below, light brownish above with Ostrea Ostrea and Inoceramus Inoceramus 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