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Horizon OC6, Clear Creek Sect., Open Door Fm., WY - Lochman and Hu 1960 (Cambrian of the United States)

Where: Sublette County, Wyoming (43.3° N, 109.8° W: paleocoordinates 7.6° S, 83.9° W)

• local area-level geographic resolution

When: Conaspis zone, Open Door Limestone Formation, Franconian (501.0 - 488.3 Ma)

• 12 to 13 feet below base of Bighorn dolomite. Interpretted to be a wave carried debris deposit.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, glauconitic, shelly/skeletal, gray limestone

• fine grained, gray, glauconitic bioclastic limestone: residues contain a few large pitted quartz sand grains, some fine quartz sand, mica flakes and small clusters of limonite pseudomorphs after pyrite.

Preservation: replaced with silica

Collection methods: chemical,

• Collected from 1938 to 1941 by the Texas Christian University Geology Department.

Primary reference: C. Lochman and C. H. Hu. 1960. Upper Cambrian faunas from the northwest Wind River Mountains, Wyoming. Part 1. Journal of Paleontology 34(5):793-834 [M. Patzkowsky/P. Borkow/J. Alroy] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8950: authorized by Mark Patzkowsky, entered by Phil Borkow on 07.09.2000

Creative Commons license: CC BY (attribution)