Field Notebook: Texas 1957b
Page 195
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Transcription
(70) 8/24/57 8/24/57/1 - So side Leonard Mt., 100-120' [illegible] in a probable tern block. The kids are digging to 2 at a 12'-15' - [gap tank in place] see 7/23/58/2 The low-hills So of Leonard Mt are folded and faulted rocks of the lithology of the 'Dugout Mt.' series. There are orange-brown sandstone, dark-calcified limestone (chalk?) and 'marl' (very possibly some sandy clayey zones) Coll 8/24/57/2 was from one of the precipice 'marl' (2 bags). The formation looks like upper Weyco or Hex cree. This could be a Leonard block or a fault-block. See aerial photos and coming here property. [Fuslinnsy, Desnoires Ag] I possibly don't know what formation the calcified darks represents; it is like those beds Crosby Brooks showed me at the SW corner of W partower. I know the rocks are badly faulted + folded and are part of the large thrust sheet picture. (71) The Lower Conglomerate contains rocks of the lithology which are underlying the area - So of Leonard Mt. The upper Conglomerate is a calcareite and seems to represent erasing post cover Congo- limestones. Here the history seems to be: 1) Thrusting + folding, lifting area above sea; 2) erosion and deposition of Chert+marlstone (etc.) Conglomerate; 3) [illegible] mean folding and uplift, this seems to be after a period of quiet times, deposition of ls and early sandstones (see Coll. 8/24/57/1) 4) depositing Calcareite 5) Gradual Subsidence as indicated by Hex-Lennard beds upward.