Field Notebook: CO 1951a
Page 113
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
Desc 4.7 Siltyclstn w/zoqll siltstone (at top) upper, 1' green, rect red, greenish to yellow grades to unit below 1.0 to 5.0 Interbedded Siltstone and silty claystone Siltstone in beds 1-3 thick, yellow-buff+ orange with, dense brown argillaceous, hard to friable. Clayston chiefly red) greenishclay some highly silty yellow. Locally (N side Tracks) only 1 siltstone bed 1'+ in this interval 9.0+ (Meas where interval above only 3'thick) Red silty claystone 8,2 Sandstone with interbeds greenishclay claystone. Upper 7-5 strictly hard beds are chiefly siltstone, argill, about 4 thick, then black, tests fine gr ss due with clay interbeds, locally cal or eufor ss beds merge. SS weathers buff to Fe brown, local red stain from Shale above. Local lenses sand ss with basal check pelible cal, (see with tracks Desc 4.5 to 10+ Gray to greenish silty claystone and argill silt. Soft sand in lower part swells some resistant the beds ss. Locally (S) tracks) interval is a channel fill w/alt bed of red I green grays & yellow silt, & sandy zone 5.12 7.0 4.5 to 10. Where 4.5 to 10+ is thin ss above has cal, coherent, ss that now is fine. 54