Field Notebook: Texas 1957b
Page 49
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
PG. 67 8/23/57 Section 37 - 1/2 mile NE of Hess Ranch House - level shots - dip 10°. 1) Igneous intrusion, it is really a syenite dike. 2) Covered, 5'. 3) Calcarudite, 8" to 12" boulders, quartzite and chert pebbles up to 1" diameter, orange-brown sand matrix 4' beds; 25'. 4) Covered, 35', probably conglomerate like #3. 5) Calcarudite; pebbles and cobbles of limestone, well rounded, light yellow sand matrix. Some chert and quartzite (up to 25%). 8/23/57/1 at base; 8/23/57/2 40' up. Total - 49'. 6) Limestone, calcarenite, some limestone pebbles, but most pebbles are 1/2" chert. This is gradational with 5 below in the last 15' of that (#5) unit. This unit (#6) becomes progressively less conglomeratic upwards, 1'-3' beds. 8/23/57/3; 11' above base. 8/23/57/4; 32' above base. Total - 32'. PG. 68 7) Calcarenite, brown-gray weathering, 2" to 3' beds, little chert pebbles. 22'. 8/23/57/5 near top. 8) Covered, 7'. 9) Dolostone; dark to medium gray, slightly brownish, 1'-4' beds, replaced fossils but they lack internal structures. 115'. [continued page 104] {note: illustration followed} [37-9 = 38-5] PG. 69 Section 38; N25W up slope behind Hess Ranch, level bunton traverse. [dip about 15°N]. covered below 1) Calcarudite, with yellowish-brown sand matrix, some pebbles of chert 1" diameter; most limestone cobbles 4"-6" diameter. 65'. 2) Calcarenite, medium gray, coarse sand size, 4" to 8" beds; 8/23/57/6 at base. Many beds of fusulinid limestone. 8/23/57/7 at 16'. Total 38'. 3) Conglomerate, chert pebbles 1/2" diameter average 3'; probably a lense in #2 lithology. 8/23/57/8. 4) Like #2, 16'. 8/23/57/9 near top. 5) Dolostone, 14'; top or ridge - dark gray, 1'-2' beds, {note: illustration followed}. PG. 70 8/24/57 8/24/57/1 - South side Leonard Mt., 100'-150' below massive calcaredite in a probable terva block. The beds are dipping to east about 12°-15°. - [Gaptank in place] see 7/23/58/2.