Field Notebook: SD, WY 1961
Page 47
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Transcription
(4) 7.8 Sandstone, fq subgreywacke with cross beds and lamine of very silty shale, and zones clay pellets (flat) and qry vry sand,, FOB layers + blocks + pyrite (?) inclusions. (Sample 2) (5) 0.3 - 1.0 Laminated + v. thin bedded grey fq SS and very b., shly silt some grey clay, locally x bedded, forms plenty ledge loc. (6) 7.1 Sandstone, fq, weathers to buff blocky face on cliff, layers OB strin. Close up SS is laminated, locally tabular x lmy and some x beds at base with clay pellets (Sample 3) (7) 4.2 Interbedded buff weath. fq to vfg SS, light grey silt and grey silty shale; plant frags thin beds + lamine, some contorted beds and 'rollers' (8) 11.6 Lower 2.0+ dk grey silty clstu with scrtl. plant frags, grading into bruish grey and purple bmn with lenses liquidtic purple bmn shale, some ?verosite strin loc. (Sample 4 (9) 9.5 Shale, blocky grey, with several interbeds fq subgreywacke sandst up to 0.6 - chiefly in lower 3.0 and upper 1.0. At base are sandy cels, lenses and ls cones with abundant Ostrea. Shale dk grey fissile, some silt and lamine + thin beds vfg sand si (?) A6G8 (10) 30.0- ? Sandstone in cliff face capped by gravel. 22