Field Notebook: SD, ND 1959
Page 43
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Transcription
9[side]? 9, 8.0 As below with [illegible] persistent conc layers at top and base. Lower one horn to reddish weather is with conc-in-conc silt jackets, zone up to 4' thick. Upper zone similar. Section 2 Starting about 21 foot of slope and measuring up on S side of toe of spur about 500 ft east section 1. 1/7.5 Clay, silty, with blocks of silt - espcc in base( 5.0. Dark gray, blocky, with some OB + rusty stain. Upper 2.0 is a tough silty clay which is locally soapy & bentonitic; holds small shoulder and weathers to popcorn darker grey than units above. 2) 415.0 Shale, gray, finely silty, weathers tite gray; grades thinly sh, and clay to unit 1 in lower 2.5 20