Field Notebook: SD, CO, WY 1967
Page 53
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Transcription
Loc 101 Section (A) continued by offsetting along layer with interference ripples (top of unit 8) to first small branch on E side of gulley to W. Dip 21°, N 27 E UNIT 9 +1° 50' Sand, v fq, w/ths yellowish orange, beds up to 10" thick to fine inch with within beds & partngs dr- gray shale, and some(?) gray laminated silts. Sand beds 12m to X. 12m. Low beds may be very low L x beds though where conc-ized some appear true laminized. (NOTE Dk gray shales are actually org rich silts with little clay.) Conspicuous feature where sandsf exposed is thin bedding. Local conc-ized sand intermittent, layered. Both sand & conc loc with spindle burrows. At top is local platy conc layer interrupt - prob discent, ripple marked. UNIT 10 This unit in halves of layer large discontinuous cones - actually a 5-6' zoned double row with top at about 1/2 of interval. 34'