Harding Formation Trilobites: Caradoc, Colorado
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Phacopida
- Pterygometopidae
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Isalaux canyonensis n. gen., n. sp.
Frederickson and Pollack 1952
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Bivalvia
- Solemyida
- Ctenodontidae
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Ctenodonta sp.
Salter 1852
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Bivalvia
- Cyrtodontida
- Cyrtodontidae
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Vanuxemia rotundata
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Gastropoda
- Euomphalina
- Holopeidae
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Eccyliomphalus contiguus
Ulrich and Scofield 1897
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Cephalopoda
- Orthocerida
- Kionoceratidae
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Kionoceras sp.
Hyatt 1884
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Cephalopoda
- Actinocerida
- Ormoceratidae
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Ormoceras sp.
Stokes 1840
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Colorado | County: | Fremont |
| Coordinates: | 38.0° North, 105.0° West (view map) | ||||
| Paleocoordinates: | 14.9° South, 74.0° West | ||||
| Geographic resolution: | local area |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| *Period: | Late/Upper Ordovician | *Epoch: | Early/Lower Caradoc |
| Key time interval: | Caradoc | ||
| Age range of interval: | 458.4 - 449.6 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Harding | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Stratigraphy from "Harding and Fremont Formations, Colorado" Sweet 1954. | |||||
Lithology and environment
| Primary lithology: | silty "shale" | ||
| Includes fossils? | Y | ||
| Lithology description: lower silty shale in basal 30 feet of Harding Formation | |||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
| Geology comments: Environments from S. Holland | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 10391 | ||
| Authorizer: | S. Holland, M. Hopkins | Enterer: | T. Hanson, M. Hopkins |
| Modifier: | M. Hopkins | Research group: | marine invertebrate |
| Created: | 2001-04-12 12:04:00 | Last modified: | 2015-06-26 14:16:12 |
| Access level: | the public | Released: | 2001-04-12 12:04:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 3835. | E. A. Frederickson and J. M. Pollack. 1952. Two Trilobite Genera from the Harding Formation (Ordovician) of Colorado. Journal of Paleontology 26(4):641-644 [S. Holland/T. Hanson] |