PBDB Collection

Warner Valley tracksite (WVT) (Jurassic of the United States)

Where: Washington County, Utah (37.0° N, 113.4° W: paleocoordinates 17.6° N, 52.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Springdale Sandstone Member (Kayenta Formation), Early/Lower Hettangian (201.3 - 196.5 Ma)

• 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.

•Reassigned to Springdale Member in Lucas & Tanner 2006.

•It is not clear at what level in the Dinosaur Canyon these tracks are from, and so a Rhaetian–Hettangian age is assigned at present.

•Five track-bearing beds in lower part of formation.

• group of beds-level stratigraphic resolution

Environment/lithology: "floodplain"; lithified, fine-grained, red sandstone and mudstone

• Lower floodplain

• fine-grained, well-sorted reddish sandstone with micro-crossbedding and a mittling of white inclusions high in CaCO3. The layers immediately above and beneath are reach reddish-brown shale/mudstone. All sediment layers who slightly undulating surfaces with minor cut and fill structures.

Size class: macrofossils

Preservation: mold/impression, trace

Collected by G. Delsignore in 1982, 2010

Collection methods: surface (in situ),

• Discovered by Gary Delsignore of Cedar City in 1982

Primary reference: W. E. Miller, B. B. Britt, and K. L. Stadtman. 1986. Theropod and prosauropod trackways from the Moenave Formation of southwestern Utah. In D. D. Gillette (ed.), First International Symposium on Dinosaur Tracks and Traces, Abstracts with Program 21 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 52153: authorized by Matthew Carrano, entered by Kaitlin Maguire on 28.07.2005, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	? Coelophysis sp. ? Coelophysis sp. "several individuals"
Reptilia
Theropoda - Grallatoridae	Eubrontes sp.², Grallator sp.¹ Eubrontes sp.² Hitchcock 1845 theropod Grallator sp.¹ Hitchcock 1858 theropod "several individuals"
Ornithischia - Moyenisauropodidae	Anomoepus sp.³ Anomoepus sp.³ Hitchcock 1848 ornithopod complete trackway

¹Lockley and Hunt 1995; ²Miller et al. 1989; ³Milner et al. 2011