Field Notebook: Texas 1957b
Page 123
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Transcription
Section 23, ½ mile S. Allison Ranch. Being section not affected. Dip 35°, N45W. 1) Calcite, dark orange-brown, quartz, rich near top. Crystalline frags common. 1' Some wood frags. 2) Covered, 105'. There seems to be a few quartz and calcite, and rubble (s?), but mostly shale in this interval Coll. 8/3/57/1 at top 3) Organic frag s., major orange-brown near base. Light brown lighter, in bed 6' to 1', 1'/62' light gray shale interbeds. 44' Coll. 8/3/57/2 near tan 4) Covered 25' 5) Conglo.; light gray, microls calcite here. almost pure calcareous small buildings up to 10" diam. Coll. 8/3/57/3 8' affected; one pebble or cobble this collect has garnetines and seems to be related to the organic frag s "3 (which is definitely present in this core) 8/4/57 Dougout 14th. 1-21/ Coll. 8/4/57/1 - Above rubble and sample in well bedded Ness Ls; This beds helps form New dip slope of the hills are set extent of Dougout Mtn. Thin to from the SW and along 2½ miles NNE of the SE end of Mt. Coll. 8/4/57/2 - From near ground cover on wolfcamp Conglo. Slope. There is some concrete tank on top grade of long ridge extending NE of Dougout 21st; no other source for these fragment obvious, I would to be from wolfcamp. Coll. 8/4/57/3 - near base of wolfcamp slope and near gap tank (?) contact with wolfcamp. The lower most Wolfcamp Conglo here is a breccia of clast fragments with siliceous cemented cement. I would like to suggest this represents the uncutched (unexposed?) thrust sheet breccia and it served as a gravel source to prevent over the smoothly surface of the truncated and folded gap tank. Silica & hematite (calcretic times?) combined to cement the concrete parts together of the wolfcamp formation as well as our interjected). This might help explain some of the breccias on the Dece Ranch.