Field Notebook: CO 1955
Page 103
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Transcription
partings and interbeds of carb siltstone and silty claystone. 34) 10.0 Sandstone, fine grained, in massive beds, x lem. Minor shaley ss partings. White, weather buff + brown. Some reddish stain locally in lower part. 33) 3.6 Siltstone, rugillaceous, carbonaceous black with carb frags + vitrain seams. Some ss at top base (sample 1) 32) 1.6 ± .5 Sandstone, dirty fine grained and siltstone in hard lenticular layer shot through with carbonaceous fragments. Weather yellowish gray rounded ledge (This lenses out to N where porcellanitic clay sits on carb siltstone above. 31) 0.3 Porcellanite zone, locally gypsiferous, 30) 2.0 Claystone, dark gray to black- silty, scattered carb frags weathers blocky to sub- conchoidal. (Sample 2 50