Field Notebook: SD, CO, WY 1967
Page 21
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Transcription
Loc 3 Clarence Lisle property. Draw in about center N 1/2, NE 1/4, sec. 28, T. 6 N, R. 59 W., Judson Hills Quad. Chieflly C sand and beds above it, has base[illegible] contact. Skeleton section follows Top of shale unit C sand 19.0 ± Sand, massive, cross-laminated, some small cones. Sand is vfg, becomes fbulzar X lzm in lower 2 or 3 ft. At top in upper 5 to 6' ± masses conc. sand, relatively flat tops hold approx level 18.0 ± Sand as above. At top conc. sand slabs with conspicuously ripple- md upper surface. Scattered conc. masses. Between 6 and 12 feet from base one or more layers of oyster cal, shark rept, teeth, crassostrea little else, water worm shells & vertebrae. Total C sand = 37.0 ± 5.5 ± Shale and sand. Bright blue-gray shale with sandy interbeds grading to gravel, sand. 28.0 - ? Sand, massive brownish to light grey white at top. Ophiomorpha up to 15"±. Locally conc. ss at 16-19' from base, cased by gravel. 8