Field Notebook: MT, WY 1986
Page 50
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Transcription
at 22.5 to top ferrug ledges in flat bedded ss, some ledges w/ interference ripples 16 47.7 fine grained mud st/siltst; rare thin interbedded ss; er-3 wh col yellow-grey siderite concretions, rare, above 13 m lignite & carb sh at 20.5m 20.8m ss tabular x bedded lens to 21.8 above 21.8, isolated lenses of indur. ss. er-7 to top of unit at 33.5m possible old mammal quarry site?