Field Notebook: CO 1951a
Page 81
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Transcription
discont. 7.5 Dark gray to black silty clay and siltstone Silt occurs mixed and in thin beds & laminaze locally. basal .6 is brownish prob due to sand content which increases downward in the lower .6 + grzder into unit below. 1.0 Siltstone, beds 1 to .4, laminated to massive, locally sandy. weaths lite gr. 3.2 Shaley clayy, dk grayt black, weaths dk blue Sample 2 gran except upper .4 which is highly silty + withis lite quiz. Lower foot + leaves with bony tissue preserved. .4 Siltstue, argillaceous , gray weaths lite blue grzry 6.4 Dark gray to black silty - locally rzb Sample 3 clay, Blocky to shaly trict.. Lighter Sample 4 .5 quiz more plastic toward base. .4 Argilaceous siltstone to finess. 20.2 Massive to X bedded SS x lam. (Ho 25 or 30 loc.) Fine gr, weathrs light buff to gray Fine to med grzined local coarse lamine incl chips white weathering. 3.0 Sandstone fine, hard, platy with ripmarked surfaces, beds .1 to .6 thick. Argilaceous siltstone ptngs. Weaths lite gray irvry to brown stain. Sample 1.5 Dk gray silty clay, weaths dk blue gray in .18 Interbedded dk gray silty clay + platgy ripple marked finess + siltstone. mden? 8.0 Massive fine grained Sandstone. (6 to 8)locuts X lam to more or less even near base, weaths buff, deeperr 1.4 Sandy gray claystone + argill. Sandstone 1.0 Massive bed fine gr, buff weath SS. 39