Field Notebook: WY 1956
Page 117
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Transcription
7.5 Claystone, gray, scattered silt and sand grains of qtz + ch, minor red flecks + pink stained areas. Chiefly a soft clstu. 0.6 +/- Siltstone, hard, irregularly laminated, seams gypsum. Forms local small ledges. 2.8 Siltstone, massive gray, yellow powdery stain in lower part weathers gray white. Becomes clayey at top and grades to unit above 5) 8.5 Claystone, gray, waxy, becoming light gray, prob bentonitic in lower 2.0. Has some suzcs with what appear to be sparsely spread spherulites. Has hard dark gray silty zones.. Unit spot-exposed only 4) 25.0 Interbedded platy siltstone, shale and silts shale. Black to gray + brown locally limnicitic. Lower 20' chiefly sHstsn, upper black silty sh + some cl.shale tdStn. Chiefly massive loc friable brn silt in basal 1/3. The 58 Not well exposed