Alcova Lake tracks [Morrison Fm.]: Kimmeridgian - Tithonian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Dinosauria indet.
(Owen 1842)
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Foster and Lockley 2006 | 3 specimens | ||||||||
| tridactyl tracks | ||||||||||
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Ornithopoda indet.
(Marsh 1881)
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Foster and Lockley 2006 | 1 specimen | ||||||||
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Sauropoda indet.
(Marsh 1878)
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Foster and Lockley 2006 | 1 specimen | ||||||||
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Reptilia
- Pteraichnidae
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Pteraichnus sp.
Stokes 1957
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Reptilia
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? Crocodylia indet.
(Owen 1842)
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Foster and Lockley 2006 | 1 specimen | ||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Natrona |
| Coordinates: | 42.5° North, 106.8° West (view map) | ||||
| Paleocoordinates: | 38.2° North, 52.7° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | local area |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| Key time interval: | Kimmeridgian - Tithonian | ||
| Age range of interval: | 154.80000 - 145.00000 m.y. ago |
Lithology and environment
| Primary lithology: | gray silty "shale" |
| Secondary lithology: | lenticular,"cross stratification",bioturbation sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "In the Alcova region near Grey Reef Dam is a series of thin tabular and laminated beds of dark silty shale and immature sandstone. The tracks were made in these muddy sediments and subsequently filled in by overlying sand." | |
| Environment: | delta plain |
| Geology comments: "lower deltaic plain and/or channel splays" | |
Taphonomy
| Modes of preservation: | cast,mold/impression,trace |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Temporal resolution: | snapshot |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | surface (in situ),field collection,observed (not collected) |
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 92105 | ||
| Authorizer: | R. Butler, M. Carrano | Enterer: | R. Butler, M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2009-10-30 06:48:19 | Last modified: | 2022-02-07 04:29:00 |
| Access level: | the public | Released: | 2009-10-30 06:48:19 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 31016. | M. V. Connely. 2006. Paleoecology of pterosaur tracks from the upper Sundance and lower Morrison formations in central Wyoming. In J. R. Foster, S. G. Lucas (eds.), Paleontology and Geology of the Upper Jurassic Morrison Formation, New Mexico Museum of Natural History and Science Bulletin 36:199-202 [R. Butler/R. Butler/M. Carrano] |
Secondary references:
| 65404 | J. R. Foster and M. G. Lockley. 2006. The vertebrate ichnological record of the Morrison Formation (Upper Jurassic, North America). In J. R. Foster, S. G. Lucas (eds.), Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36:203-216 [M. Carrano/M. Carrano] |