Bollan Quarry, Rabbit Valley: Kimmeridgian - Tithonian, Colorado
collected by H. Bollan 1978, 1984, 1986–1987
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Stegosauridae
|
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Stegosaurus sp.
Marsh 1877
|
1 individual | ||||||
|
= Stegosaurus ungulatus
Marsh 1879
|
Bollan 1991 | ||||||
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Reptilia
- Theropoda
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Allosaurus sp.
Marsh 1877
|
Foster 2003 | 1 individual | |||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Colorado | County: | Mesa |
| Coordinates: | 39.2° North, 109.0° West (view map) | ||||
| Paleocoordinates: | 35.3° North, 55.6° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 1394 meters | ||||
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Late/Upper Jurassic |
| Key time interval: | Kimmeridgian - Tithonian | ||
| Age range of interval: | 154.80000 - 145.00000 m.y. ago |
Stratigraphy
| Formation: | Morrison | Member: | Brushy Basin | ||
| Local section: | N-Thoroughfare | Local bed: | 400 ft | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: low in Brushy Basin Mbr., 25 ft. above the base | |||||
Lithology and environment
| Primary lithology: | gray,green poorly lithified sandstone |
| Secondary lithology: | hematitic,red claystone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "a soft grayish-green sandstone, but immediately adjacent to the bones, it gave way to a red hematitic clay" | |
| Environment: | "channel" |
Taphonomy
| Modes of preservation: | body,soft parts |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | many |
| Fragmentation: | occasional |
Collection methods and comments
| Collection methods: | selective quarrying,surface (in situ),mechanical,field collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Collectors: | H. Bollan | Collection dates: | 1978, 1984, 1986–1987 |
Metadata
| Also known as: | Bollan Stegosaurus, CO-27, Bollan's Site | ||
| Database number: | 56586 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2005-11-21 11:07:59 | Last modified: | 2017-11-02 15:46:26 |
| Access level: | the public | Released: | 2005-11-21 11:07:59 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 15239. | ETE | H. J. Armstrong, W. R. Averett, M. E. Averett, E. S. McReynolds, and D. G. Wolny. 1987. Mid-Mesozoic paleontology of the Rabbit Valley area, western Colorado. In W. R. Averett (ed.), Paleontology and Geology of the Dinosaur Triangle: Guidebook for 1987 Field Trip. Museum of Western Colorado, Grand Junction 37-43 [M. Carrano/M. Carrano] |
Secondary references:
| 15268 | ETE | H. J. Armstrong and E. S. McReynolds. 1987. Stratigraphic correlation of dinosaur quarries near Grand Junction, Colorado. In W. R. Averett (ed.), Paleontology and Geology of the Dinosaur Triangle: Guidebook for 1987 Field Trip. Museum of Western Colorado, Grand Junction 103-106 [M. Carrano/M. Carrano] |
| 63751 | H. R. Bollan. 1991. The Bollan Stegosaurus. In W. R. Averett (ed.), Guidebook for Dinosaur Quarries and Tracksites Tour, Western Colorado and Eastern Utah 53-54 [M. Carrano/M. Carrano] | |
| 15179 | ETE | J. R. Foster. 2003. Paleoecological analysis of the vertebrate fauna of the Morrison Formation (Upper Jurassic), Rocky Mountain region, U.S.A. New Mexico Museum of Natural History and Science Bulletin 23:1-95 [M. Carrano/M. Carrano] |
| 13281 | ETE | C. E. Turner and F. Peterson. 1999. Biostratigraphy of dinosaurs in the Upper Jurassic Morrison Formation of the Western Interior, U.S.A. In D. D. Gillette (ed.), Vertebrate Paleontology in Utah, Utah Geological Survey Miscellaneous Publication 99-1:77-114 [M. Carrano/M. Carrano/M. Carrano] |