Also known as BBDC, DS, DS-W, WCSD, SGDS, Darcy Stewart sites, Washington County School District
Where: Washington County, Utah (37.1° N, 113.5° W: paleocoordinates 17.3° N, 52.8° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Whitmore Point Member (Moenave Formation), Hettangian (201.3 - 199.3 Ma)
• about 2 m above the MTL and TS layers, in the upper shale interval
•
•Most of the Moenave Formation is the Dinosaur Canyon Member. In the Moenave type section, near Tuba City, Arizona, all of the Moenave section is Dinosaur Canyon Member, as it is throughout the Moenave outcrop belt along the Echo Cliffs and Ward's Terrace of northern Arizona. However, north of the Grand Canyon in Arizona and in southwestern Utah, the upper part of the Moenave Formation is lacustrine strata. These strata are the Whitmore Point Member.
•Lucas et al. (2011: Palaeo3 302: 194-205) proposed, on the basis of multiple lines of biostratigraphic evidence, that the Triassic–Jurassic boundary is placed within the middle part of the Whitmore Point Member of the Moenave Formation where this member is present, and high in the Dinosaur Canyon Member elsewhere. The "Whitmore Point assemblage" of vertebrate taxa, earliest Jurassic (Hettangian) in age. The underlying "Dinosaur Canyon assemblage", is latest Triassic (Rhaetian) in age.
•
•Because the stratigraphic position of this site within the Whitmore Point is unclear, a Rhaetian–Hettangian age is given.
• group of beds-level stratigraphic resolution
Environment/lithology: lacustrine; paleosol/pedogenic sandstone
Size class: macrofossils
Preservation: cast, mold/impression, trace
Collected by A. Milner in 2001-
Collection methods: quarrying, surface (in situ),
Primary reference: A. R. C. Milner, M. G. Lockley, and J. I. Kirkland. 2006. A large collection of well-preserved theropod dinosaur swim tracks from the Lower Jurassic Moenave Formation, St. George, Utah. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, & J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:315-328 [M. Carrano/M. Carrano/M. Carrano]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 121320: authorized by Matthew Carrano, entered by Matthew Carrano on 02.12.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Reptilia | |
| |
| |
Chondrichthyes | |
| |
Helminthoidichnites | |
|