Spring Hill: Trentonian, Virginia
collected by G. A. Cooper
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Asaphida
- Asaphidae
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Isotelus sp.
Dekay 1824
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2 individuals | |||||||||
| "a few cranidia, isolated free cheeks, hypostoma and pygidia" (so at least two) | ||||||||||
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Trilobita
- Trinucleida
- Trinucleidae
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Cryptolithus tesselatus
Green 1832
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32 individuals | |||||||||
| corrected as Cryptolithus tessellatus | ||||||||||
| 32 cephala, 14 pygidia | ||||||||||
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Trilobita
- Proetida
- Otarionidae
|
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Otarion sp.
Zenker 1833
|
2 individuals | |||||||||
| "a few cranidia and isolated free cheeks" (so at least two) | ||||||||||
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Trilobita
- Phacopida
- Dalmanitidae
|
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Dalmanitidae indet.
Vogdes 1890
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Whittington 1959 | |||||||||
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Trilobita
- Phacopida
- Cheiruridae
|
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Ceraurus pleurexanthemus
Green 1832
|
13 individuals | |||||||||
| 13 cephala, 14 hypostomae, 12 pygidia | ||||||||||
|
= Ceraurus whittingtoni
Evitt 1953
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Evitt 1953 | |||||||||
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Trilobita
- Phacopida
- Calymenidae
|
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Flexicalymene senaria
(Conrad 1841)
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13 individuals | |||||||||
| recombined as Flexicalymene (Flexicalymene) senaria | ||||||||||
| 13 cephala, 5 protaspes, 7 hypostomae, 7 pygidia | ||||||||||
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Trilobita
- Odontopleurida
- Odontopleuridae
|
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Diacanthaspis cooperi n. sp.
Whittington 1941
|
11 individuals | |||||||||
| recombined as Diacanthaspis (Diacanthaspis) cooperi | ||||||||||
| 11 cephala, 5 hypostomae, 7 pygidia | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Virginia | County: | Augusta |
| Coordinates: | 38.3° North, 79.1° West (view map) | ||||
| Paleocoordinates: | 29.9° South, 59.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| Key time interval: | Trentonian | ||
| Age range of interval: | 457.00000 - 449.80000 m.y. ago |
Stratigraphy
| Stratigraphy comments: "of Trenton age, possibly the same as that of the Denmark member of the Sherman Hall formation" |
Lithology and environment
| Primary lithology: | "limestone" |
| Lithology description: "loose blocks of limestone" | |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body,replaced with silica |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | some |
| Disassociated major elements: | many |
Collection methods and comments
| Collection methods: | selective quarrying,chemical,hydroflouric,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Collectors: | G. A. Cooper |
| Collection method comments: "etched in a five per cent solution of hydrochloric acid" | |
Metadata
| Database number: | 81308 | ||
| Authorizer: | J. Alroy, M. Hopkins | Enterer: | J. Alroy, M. Hopkins | Research group: | marine invertebrate |
| Collections that are a subset of this one: | |||
| Created: | 2008-06-18 15:30:46 | Last modified: | 2008-06-18 18:30:46 |
| Access level: | the public | Released: | 2008-06-18 15:30:46 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 27399. | H. B. Whittington. 1941. Silicified Trenton trilobites. Journal of Paleontology 15(5):492-522 [J. Alroy/J. Alroy] |
Secondary references:
| 35212 | W. R. Evitt. 1953. Observations on the trilobite Ceraurus. Journal of Paleontology 27(1):33-48 [M. Hopkins/M. Hopkins] | |
| 35208 | H. B. Whittington. 1959. Silicified Middle Ordovician trilobites: Remopleuridae, Trinucleidae, Raphiophoridae, Endymioniidae. Bulletin of the Museum of Comparative Zoology 121(8):371-496 [M. Hopkins/M. Hopkins] |