Field Notebook: SD, WY, ND 1957
Page 63
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Transcription
Offset to cut above dam at flume head. SS A+B come together at crest of ridge soils between pinchout. T 13.0 SSB. Siltstone, v.fine gr., x bedded, with two zones + of shaly siltstn + ss interbedds and some partings of same. Irregular base in sharp contact with unit below. Weathrs yellowish brown. This unit prob. includes 2.0+2.5 units of preceding sect. at top Overlying it here is red btm weath ss. ledge prob = the 14, ft ledge of test section. T 7.0 Siltstone, clayey, + silty clsty dark gray, blocky texture Upper 1.0 + under ss contains concr. like light gray to cream colored clstn. T 1.0-1.5 Siltstn, slightly clyc, forms massive, crumbly to blocky yellow weath. ledge in clsty slope 30