Field Notebook: CO 1955
Page 113
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Transcription
7) 1.1 Claystone, laminated with siltstone, reddish-purple at contact then thru brick red to buff. 6) 1.7 Shelly, dk gr to black locally silty. 5) 0.3, Bentonite 4) 4.5 Shelo, silty, dk gray with silt laminae and thin interbeds, bessel 0.8 is more of a shelly siltstone 3) 7.5 Shelly clay, black fissile, gypsiferous with black ironstone concretions. About 1 ft from top is crumblly zone may be minor fault trace. (Sample 12) 2) 2.0 Shelo, clzhk gray to black silty, with laminae & thin beds siltstone + fine gr. SS. - platy. 1) 3.0+ Shelo dk gray, silty, grading in 3 feet +/- to argill siltstone. West well of quarry on this silt 55