Kolob Canyons (Triassic of the United States)

Where: Washington County, Utah (37.4° N, 113.1° W: paleocoordinates 8.1° N, 38.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: lower red Member (Moenkopi Formation), Smithian (251.3 - 247.2 Ma)

• The lower red member is a lateral equivalent of the lower part of the Torrey Member of the Moenkopi Formation (Mickelson et al. 2006: table 1).

•"In SE Utah, the Torrey Member immediately overlies the Sinbad Limestone, a marine unit that yields Smithian ammonoids...The Virgin Limestone, of early Spathian age, may correlate to the uppermost part of the Torrey Member. Therefore we regard the Torrey as primarily of Smithian age" (Lucas & Schoch 2002: Lethaia 35: 97–106)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; gray shale and fine-grained sandstone

Size class: macrofossils

Preservation: trace

Collected in 2004-2005

Primary reference: D. L. Mickelson, A. C. R. Milner, D. DeBlieux and J. L. McGuire. 2006. The oldest known Early Triassic fossil vertebrate footprints in North America, from Zion National Park, Utah. New Mexico Museum of Natural History and Science Bulletin 34:141-144 [R. Butler/R. Butler]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 135440: authorized by Richard Butler, entered by Richard Butler on 25.10.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

  - Rhynchosauroidae
Rhynchosauroides sp. Maidwell 1911 reptile
 Pseudosuchia - Chirotheriidae
Chirotherium sp. Kaup 1835 archosaur