Field Notebook: SD, WY 1961
Page 71
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Transcription
to yellow-bn steep slope. A top is zone lzuge, bn wezth ls. cones, compressed ovoid with up to 5' long dizm. chiefly bzrven, found Nucula in one 2nd pocket small oysters in clayey silt beside it. At 2.0 from base found 1 conc. with fish (2) Trzys (Sample 1- which also includes freq. of bored bentonite) Section 2 - measuring down from base of lower bentonite, unit 1, of Section 1 (U) 15.1 Clayey silt and silty clay, dark grey to grey, with irreg. lzmnuze and pods of silt and some sandy silt. Jevosite pods throught and concentration of jevosite layers in upper 3 to 5.0. Locally ls. cones, just under to 1.5 under bentonite. At base zone browneth ls. cones. Beneath for 5.0+ becomes more shaly with some interbedded fissile black shale, finely silty-jevosite blebs continue - Base section is washed covered 34