Field Notebook: Texas 1959
Page 41
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Transcription
----- 56'. 16) Calcilutite, brown-gray weathering, 2" to 3' beds, irregular bands of chert (3 cycles) nodules, grades upwards into quartz sandstone beds, at 56-60' there are several lenses of shell hash with silicified fossils - Collection 5A-16 at 60' --------- 137'. 17) Limestone, brown-yellow weathering, 6" to 2' beds scattered white chert patches, cliff forms, saccharoidal with purple weathering patches, pitted surface ----- 25'. 18) Limestone, brown-gray weathering, 6" beds ------ 17'. Unconformity - 8' of relief in 100 yards along strike. 19) Dolostone, brown-gray, rubbly cemented by clear calcite matrix - forms top of ridge - 65'+. [Start here.] PG. 64 Section 5. Section at West end of Road Canyon. 9°S dip to the S70W King's fault contact of the Word against Vidrio is true, although there is [also] possibly a fault 100 yards further up the hill. Vidrio [top of section] 10. Dolostone, brown-gray with large clear calcite crystals and a calcite matrix (Collection of this) - to top of hill. Unconformable contact - several (2') of relief? [Top of Word, Fourth limestone] 9. Limestone, calcilutite, yellow-brown, 2"-6" beds with chert nodules ---- --12'. 8 . Ss., dark brown weathering, siliceous bands with calcarenous cement where calcite cement remains weather, light yellow- brown - -------32'. 7. Limestone, calcilutite, yellow-brown weathering, brown on fresh surface, 1' to 2' beds patches of chert crystals ---- 20'. PG. 65 6. Limestone, medium gray, massive lenses 1' to 4' thick in rocks like above unit -------12'. 5. Limestone, yellow-brown weathering, brown chert nodules, 6" beds. Collection of fusulinid from here.------ - 18' 4. Ss., dark yellow-brown weathering, 1' to 3' beds chert crystals - ---------8'. 3. Limestone, yellow-brown weathering, brown chert nodules, 6" to 1' beds -- -------10'. 2. Ss., dark brown, siliceous -------- 6'. Probably top of third Word limestone 1. Limestone, light gray weathering, platy, - ---10' exposed. 0. Covered beneath. PG. 66 Blank