Field Notebook: Texas 1957a
Page 138
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Transcription
128 7 7/24/51 Section 19 - up to eastern meet Cliff joining Wgcamp Crags - topped by Brea & Lidge Brea Ranch. The lower part of this section is covered and as jumbled up no day 0) Covered below 1) Sandstone, green-gray weathering, much green vitrinal, 6", Collection 7/24/57/1 2) Conglo., brownish weathering, mostly 1/4" to 1/2" clust pebbles, brown sand, some but few crinoid stom fragments, 5', 7/21/57/2, 2" to 6" thick 3) Covered, 10' 4) Ls, mid-gray weathering, bihermal, no digurate bedding, large cephalopods, crinoad remains, probably too large for Penn., could they be Perm?) brachiopods - 29' Collection 7/21/57/3 (Rained out!) 7/24/57/1 7/22/57/11 7/21/57/3 7/21/57/2 7/21/57/1 129 7/22/57 (quartzite) 5) Ls, wt 30-40% clust/jebbles - gray to gray brown weathering; a few ls pebbles. 3' below, from about middle of unit upwards, larger ls. cobbles appear, a few lons are nearly sandy (coarse); 46' it should be noted that the upper 2/3 of this unit could probably best be called a Conglomerate. The ls. is nearly completely lacking except as cobble in the upper cliff. about 5% or less of the upper rock unit is ls cement. 6) Covered for most part, exposure are conglo, clust & quartzite, ls cement. One big ls block at 38' (Collection 7/22/57). 145' - I'm separating this as a unit only because of the weathering characteristics. 7) Conglo, poorly sorted to no sorting, clust, quartzite, ls. pebbles; some small cobbles - lime cement. 2 flaws, cliff forming. Become coarser (small to med. boulders) upwards. 84', 1' to 20' beds. 8) Covered - 65' this is probably the extension to the west of the green gray shale + calcareous conglomerate.