Field Notebook: WY, SD 1956
Page 39
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Transcription
fract. silty to silty 14.5± Claystone, grey, with greenish to bluish, loc. purplish cast. Lower 3.0t green vsv. red, upper 3 to 4 feet [illegible] light gray variegated with red + purple. → ss of offset prob in here. 17.5± Claystone, grey, finely silty, some light green mottling. 7.0 Claystone, variegated shades red pink purple on gray, minor green, some ORB in top. Silty to finely silty. 2.0 Claystone, silty, grading up to clayey siltst, brownish gray stained yellow by Fe, some concentrations spherulites. 1.0± Claystone, silty, grey to black, carbonaceous, grades to unit below. ~ to tabular 4.0-? Sudstone, massive, fine-gr., friable in lower 0.8±, c/zps several small buttes in vic. (Interval top Lzkute silt to contact with FR is 51 feet) 18