Field Notebook: CO 1951d
Page 35
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Transcription
12.0 Silty shale and siltstone, interbedded, mostly siltstone which is argill. to ferrug. thin beds less than 1" common. 1.6 Silty shale dark gray, grading into argill siltstone at top. 2.0 Argillaceous siltstone and fine ss. 7.6 Sandstone, massive, fine grained, Fe-brown weeth, ripple wkd stop, 0.2 Gray 2oz py bentonitic clay, [?]ot sample #4} #4 5.5 Argillaceous siltstone Shale silty to highly silty with some irony, ducks argill, slt, clk grey to clay 7.0 Siltstone argillaceous, soft locl zones silty claystone, some creep, beds harder siltstone in upper 1.5. 3.0 As above but no rests at beds, 2.8 Sandstone, massive, fine grained, dense. 6.0 Siltstone and highly silty shale, alk grey, rusty ferruginous zone about .2 #5 of silt at base with some conc Fe. 1.8 Sandstone, fine grained, laminated, argill. at top, locally has inter lzw, Shale 2.0 T crep interbedded, dk gray to bltlt sh grey and lite argy siltstone, argill + loc cerb frzgs. Bed argill sltst, about 0.6 at top. 1.0 shale, dk grey silty with 0.2 bentonite at top, and 0.2 sltsto below bentonite.