Field Notebook: CO 1951c
Page 59
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Transcription
Section #2 Trenched shale slope above ledge SE rd cut, shale weathered and prob. some slump loc, but best sect. usable. Tz1us 5.8 Dk gray shale some silty zones. 3.3 Highly silty clay and argillaceous silt, gray 0.4 Bentonite [key bed for continuation with sect 3] 4.1 Black, plastic clay, weather fissile 3.3 Dk gray to black silty plastic clay with beds siltstone in upper foot Possibly 1/2" bentonite at base 10.0 Siltstone, upper 5.5 fairly resistant, metres bench inside. Irreg. bedded with some fine ss., + some argill siltstone, lower 4.5 is soft, argillaceous siltstone with some beds and irreg lensare of silt + ptps silty clay 6.0 Interbedded silty shale and argill. silt + beds silt. Silt stuff predom. 0.9 Silty bentonitic shale - has thin gray bentonite streaks. 3.5 Dzk gray silty clay, some lzmzng silt 0.1 Bentonite 4.2 Dk gray silty clay with scattered silt + sand lzmzng 6.0 Highly silty clay + argillaceous siltstone gray, some harder beds siltstone 28