Field Notebook: SD, WY 1961
Page 49
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Transcription
Section #2 (Loc 75) At south end of cliff, measuring up from the oyster bed. Unit 1 of this section is equivalent to unit 9 of section #1; it is 'shazier' (1) 8.9 Shale, fissile gray to dk gray clay. Shale (Sample 2) with some thin interbeds of buff weth ss lower 2' and oyster bed at bzsc. Frunz of oyster bed = Sample 1.-fossils; Sample 2 (shale 0-3' and 3' to 8' above oyster bed) (2) 39.2 Sandstone, fq and vfg, chiefly buff weth, loc cliff-forming, tabular x 12m som x-bedding but chiefly x 12m, lower 8.0 has lzycos clayey vfg szud, weths gray. Zones OB Stein and locally (22.5 from bzsc about 2.10 indurated x 12m ledge. Above this ledge move uniform f>cc tzb x 12m to x bed. ss.. At top back from cliff ss weth rounded. Hzs jzosite concentr. at top. (3) 5.0 Shale, liquefied, silty weths purple-brown in lower 2.10+ and grades up into lite gray shale with plant frags and OB weth Fe. concs. (4) 5.0- Popcorn slope on bentonite( silty clay to grass roots 23