Field Notebook: Texas 1957b
Page 79
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Transcription
Spend day in town drafting up section and trying to make sense out of the Hess area. Sections 37, 39 and 41 seem to fit a pattern. The increase thickness of conglomerate in 41 is apparent the result of measure up through another thickness of foreset conglomerate beds. 41 is more basinward and contains at least one thick set of conglomerate beds. The picture from the top of Hess Horst should show this quite well. The lower part of King's section 22 I just can't place in my sections. King's says his bed 7 can be traced laterally in to his bed 4 Sec. 21 (my bed 18, Sect. 37). His great thickness of limestone (bed 4) would then be equivalent to my shaly interval in Sect. 41 (beds 14,15,16). PG. 121 Afternoon, Hess Ranch, went up King's section 22. (Probably not quite the same place as King 22). Covered below 1) Conglomerate - limestone pebbles of various sizes up to 5" diameter near base, chert and quartzite pebbles about 3" max diameter. In limestone matrix, Higher the conglomerate becomes fine and white and greenish chert pebbles 1"- 2" diameter are common to abundant. 70'. 2) Covered, 25'. 3) Limestone, yellow-orange weathering. Fine grained with much colored silt, in large part dolomitic. Bed are 6" to 1', poorly exposed, probably with much interbedded shale. 30'. 4) Covered, 26'. 5) Limestone, medium gray to gray-brown, fine grained and in large part dolomitic occasional patches of loss dolomitized rock with poorly preserved fusulines. 195'. (King's bed 4). PG. 122 6) Massive limestone (King's bed 5). It is this bed that can be traced into bed 4 of King's section 20. I don't know where King got 201' for his medium gray limestone (my bed 5). The lower part of his section is seeming way off, did he estimate if from the top looking down? [5/00 - my original 95' does not fit with either section King's 22 or 21, but 195' does]. The light gray limestone unit I've been tracing eastward changes to dolomite about 1/2 mile east of King's section 22. It can be traced approximately in to King's bed 4, Sect. 23. It is also traceable into bed 3, King's Sect. 24, and into either bed 10 (my sect. 8b) or the siltstone shale interval just above it. PG. 123 8/6/58 Moore Ranch - Moore Ranch Road to High land - collected from the interval near the top of the ridge. {note: illustration followed} PG. 124