Field Notebook: CO 1952b
Page 81
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
5. Section of Dakota & Glencely (pzt) in Nameless Draw N 15° W, 45° SE From top of massive unit down (does not include thin shale & ss at top.) A 33.4 Sandstone, beddy, even-bedded x-lgm fine gr. locally friable, weaths yellow brown gray. Lower 4.0 has clay-pellet cal. B 3.9 Obscured, probably aquilla siltst & ss, a 'clay' zone. C 4.6 Sandstone, massive, dense fine grained brown-weath ss, upper surface ripple marked. D 5.4 Argillaceous blue-gray weath siltstone, and probably silty clay, but obscured by slope wash. Locally 1' good bl. clay. Only clay E 15.5 Sandstone, massive to even bedded cross-lgm. fine gr. weaths yellowish brown to gray F 3.5 Slope wash obscures weak zone. Argillaceous siltstone in flat. G 13.0 Sandstone, massive to even bedded cross-lgm. fine gr. weaths yellowish to gray H 4.0 Obscured weak zone, sands float, some aquilla siltst. I 34.0 Sandstone, massive to even-bedded x lgm, fine to med. gr near base with local basal zone coarse to coptic with clay pellets also. brown-weath. J. 6.0 slabby siltstone & fine ss w/til interbedded silty shale & shaly siltstone. Breakdown 1.0 Dk gray silty sh. 2.5 Pizty siltst & ss 1.0 Shaly siltys, minor sh. 1.5 Pizky siltst.