Gold Spring Wash (MNA 291, MCZ 77 AR/4, TMM 43699): Sinemurian - Pliensbachian, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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cf. Archosauria indet.
(Cope 1869)
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Database 2021 | 1 specimen | ||||||||
| TMM 43669-8 | ||||||||||
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cf. Scutellosaurus sp.
Colbert 1981
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Breeden and Rowe 2020 | 1 specimen | ||||||||
| TMM 43669-11 | ||||||||||
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Scutellosaurus lawleri
Colbert 1981
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3 individuals | |||||||||
| MNA P1.1752 (= MNA.V.1752), partial skeleton (paratype); TMM 43669-5, 6 | ||||||||||
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Theropoda indet.
(Marsh 1881)
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Database 2021 | 1 specimen | ||||||||
| TMM 43669-10 | ||||||||||
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Syntarsus kayentakatae
Rowe 1989
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Database 2021 | 1 specimen | ||||||||
| TMM 43669-3 | ||||||||||
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cf. Kayentachelys sp.
Gaffney et al. 1987
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Database 2021 | 3 specimens | ||||||||
| TMM 43669-1, 2, 4 | ||||||||||
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Tritylodontidae
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||||||||||
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Kayentatherium sp.
Kermack 1982
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Database 2021 | 1 specimen | ||||||||
| TMM 43669-9 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Arizona |
| Coordinates: | 35.7° North, 111.1° West (view map) | ||
| Paleocoordinates: | 19.4° North, 49.8° West | ||
| Basis of coordinate: | based on nearby landmark |
Time
| Period: | Jurassic | Epoch: | Early/Lower Jurassic |
| *Period: | Early/Lower Jurassic | *Epoch: | Early/Lower Lias |
| *International age/stage: | Hettangian | ||
| Key time interval: | Sinemurian - Pliensbachian | ||
| Age range of interval: | 199.50000 - 184.20000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Glen Canyon | Formation: | Kayenta | Member: | Silty Facies |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | red lithified sandstone |
| Secondary lithology: | lithified silty sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Fluvial sandstones, silts and claystones, predominately red in color. There are also local deposits of silicified limestones, and clay pellet conglomerates. These sediments are characteristically flat-bedded and in places they show cross-laminations. Moreover it is obvious that sand dunes occurred in the western and northwestern extend of the exposures...Two facies are recognized...at its type locality, a sandstone facies...to the southwest [it] increases rapidly in thickness and silt content. About 75 miles southwest of Kayenta...the formation is represented by a silty facies which is markedly different in outcrop character from the sandstone facies. | |
| Environment: | wet floodplain |
| Geology comments: paleoenvironment described as including "southwestardly flowing rivers, rising from highlands...and meandering across a broad alluvial plain into low-lying marshes." | |
Taphonomy
| Modes of preservation: | body,trace |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Associated major elements: | all |
| Size sorting: | poor |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | selective quarrying,chemical,field collection |
| Collection size: | 1 individuals |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Also known as: | Ward Terrace | ||
| Database number: | 13280 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-02-13 13:19:22 | Last modified: | 2022-07-19 13:08:19 |
| Access level: | the public | Released: | 2002-02-13 13:19:22 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 4405. | 5% 30980 | E. H. Colbert. 1981. A primitive ornithischian dinosaur from the Kayenta Formation of Arizona. Museum of Northern Arizona Bulletin 53:1-61 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
| 77736 | B. T. Breeden, T. J. Raven, R. J. Butler, T. B. Rowe, and S. C. R. Maidment. 2021. The anatomy and palaeobiology of the early armoured dinosaur Scutellosaurus lawleri (Ornithischia: Thyreophora) from the Kayenta Formation (Lower Jurassic) of Arizona. Royal Society Open Science 8(7):201676:1-43 [M. Carrano/M. Carrano/M. Carrano] | |
| 74898 | B. T. Breeden and T. B. Rowe. 2020. New specimens of Scutellosaurus lawleri Colbert,1981, from the Lower Jurassic Kayenta Formation in Arizona elucidate the early evolution of thyreophoran dinosaurs. Journal of Vertebrate Paleontology 40(4):e1791894:1-32 [M. Carrano/M. Carrano] | |
| 74900 | T. M. M. Database. 2021. Online data from Texas Memorial Museum collections database. [M. Carrano/M. Carrano] |