Field Notebook: CO 1955
Page 15
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
about 2.0 above base. Bzszl 0.8 is increasingly silty, lighter gray. 1) 3.6 Siltstone grading to fine sandstone, upper part argillaceous, carbonaceous shelly silt lenses & thin beds, some x-lens fine ss lenses in lower part - weathers lite gray to gray white, irregularly bedded. To south on ridge upper 1.5 of siltstone grades to variegated clzstune - pink + gray white Note, The shaley beds in this section are blocky, not fissile. Not obviously laminated. Interbed has cyclic repetition of lignitic sh, grading upward to lite gray waxy sh. Sec 55-3 - same locality, up slope across from Sec 55-1. From base of unit (1) above downward 12.0+ Sandstone, fine grained, massively bedded, cross-laminated, weathers to blocky, buff, ridge. Base obscured by slope wash. Sec 55-4- Across swale from bed (12+) above. The lower Dzk ss is 32' thick and