Moenave tracksite, MNA 565: Rhaetian - Hettangian, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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| 1 specimen | ||||||||||
| track | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Arizona | County: | Coconino |
| Coordinates: | 36.1° North, 111.3° West (view map) | ||||
| Paleocoordinates: | 10.9° North, 40.0° West (Wright 2013) | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic - Jurassic | Epoch: | Late Triassic - Early Jurassic |
| Stage: | Rhaetian - Hettangian | 10 m.y. bin: | Triassic 4 - Jurassic 1 |
| Key time interval: | Rhaetian - Hettangian | ||
| Age range of interval: | 208.5 - 199.5 m.y. ago |
Stratigraphy
| Geological group: | Glen Canyon | Formation: | Moenave | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 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 Moenave is unclear, a Rhaetian–Hettangian age is given. | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | trace |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | surface (in situ),observed (not collected) |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 126610 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | R. Butler | Research group: | vertebrate |
| Created: | 2012-04-10 04:47:56 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2012-04-10 04:47:56 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 41099. | G. V. Irby. 1993. Early Jurassic dinosaur tracksites, northeastern Arizona. In D. Boaz & M. Dornan (ed.), Proceedings of the 1st Annual Symposium, Fossils of Arizona. Mesa Southwest Museum and Southwest Paleontological Society, Mesa, AZ 15-25 [M. Carrano/M. Carrano] |