Field Notebook: CO 1951a
Page 33
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Transcription
Route 40 Section - Overturned block at N. end hogback Greenevos (rev'l) At top west side quarry .9 Hard siltstone, dk gray weathers light gray Fe stained. .2 Bentonite - locally weathers pink 6.1 Dark gray clay [shaley] weathers to light blue-gray clay shale, silty in lower part 8.5 Interbedded argillaceous siltstone with silty clay, siltstone in thin beds, weathers lite gray, splittery fracture shale interbeds decrease downward About 15 ft thick at top and with 54 strike 3.2 Siltstone, crazy , even beds (thin), laminated, lite gray silty shale at top,3, few shale partings Brezl - Continuous without overlap or gap (with above interuz) at roadcut's 40-6 8.2 Interbedded argillaceous siltstone with silty shale (loc silty), thin beds as in 8.5, zebra, increasing ly Silty downward 0.3 scale about .2 above base. B SP 3.3 Fine gr. ss buff to Fe brown weathering Thin bones Eql of shale chips throught--wostry in lowerks. [Prob local channel] .6 Dark gray shale with siltstone(.1 ft) in mid dart 4.0 Irrog. interbedded dk gray Siltstone with fines Beds .1 to .4 thick weathers lite gray with Fe stain along some beds. Shaley partings in lower feet. 4.0 DK gray fissile-weathering shale with thin laminez and interbeds of siltstone + shale, siltstone up to .13, Fine SS beds in lower foot weath. to brown Silty beds to lite gray, 14