Field Notebook: Texas 1957b
Page 31
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Transcription
PG. 41 I believe the Hess Conglomerate has been deposited on the lower beds westward to the Brooks Ranch - explains lack of outcrop. The beds above the Hess Calcaredite are shaly and silty for a considerable distance 30'-40' upward. They then began to alternate in some sort of cyclic deposition. {note: illustration: bed 1: 30'+-; red and maroon shale bed 2: 2'; orange very fine sandstone bed 3: 7'; gray shale bed 4: 1'; gray dolarenite (xbeds) bed 5: 8'; gray shale bed 6: 1.5'; orange-brown very fine ss. bed 7: red shales ( and maroon)} The Hess Conglomerate usually has a red shale and pebble zone either in or at its top; in the eastern portion of Moore Ranch - In fact in the middle and western exposure also. The first canyon east of the ranch road through the Wolfcamp fm. has 4 or 5 Hess Conglomerate separated by red shales and buff sandstones. The Hess is about 75' to 80' thick here - The Wolfcamp limestone thickens here and the Gaptank limestone (#?) is well exposed. The dip of the Gaptank and Wolfcamp increases PG. 42 cont. from pg. 41: from about 10°-12° to about 20° for the next 1 mile eastward; this is opposite the anticline in the Penn. and suggest that structure is in part at least post-Pm. (The Hess and Leonard like wise steepen). {note: illustration: See Section 31: limest#3: 30' 300'-350' ?limest#5: 5'-10' 45' 10' 10'; limy shale and siltstone Wolfcamp: 30'; flagy ls and massive +- Hess conglo: 170'; orange ss and red clay; conglo and red clay.} PG. 43 8/18/57 Sect.38 of G.S.A. Memoir Section 30, 1/2 mile east of Moore Ranch road to higher range. Covered below 1) Sandstone, brownish-tan, fine sand size, quartz, calcareous cement, 6" to 8" beds; 5', 8/18/57/1.