Cliffield Formation, Five Oaks Member, Gratton: Caradoc, Virginia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Murchisoniina
- Hormotomidae
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Hormotoma sp.
(Salter 1859)
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Gastropoda
- Murchisoniina
- Trochonematidae
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? Trochonema sp.
Salter 1859
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Gastropoda
- Murchisoniina
- Lophospiridae
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Lophospira spp.
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Trilobita
- Phacopida
- Pterygometopidae
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Calliops sp.
Delo 1935
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Trilobita
- Asaphida
- Asaphidae
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Homotelus sp.
Raymond 1920
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| synonym of Isotelus | ||||||||||
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Ostracoda
- Leperditicopida
- Leperditiidae
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Leperditia fabulites
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| (Conrad) | ||||||||||
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unclassified
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Tetradium syringoporoides
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| Ulrich | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Virginia | County: | Tazewell |
| Coordinates: | 37.1° North, 81.4° West (view map) | ||||
| Paleocoordinates: | 29.6° South, 61.7° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| 10 m.y. bin: | Ordovician 4-5 | ||
| Key time interval: | Caradoc | ||
| Age range of interval: | 458.40000 - 449.60000 m.y. ago |
Stratigraphy
| Formation: | Cliffield | Member: | Five Oaks Limestone | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: Whiterockian | |||||
Lithology and environment
| Primary lithology: | gray "limestone" |
| Includes fossils? | Y |
| Lithology description: fresh surfaces are characteristically dove gray, but weathered surfaces are generally white or light gray; limestones contain euhedral rhombs of calcite 0.5 to 8 mm in diameter, which are enclosed by exceedinly fine calcite grains; the beds break with a furrowed conchoidal fracture similar to that of many so-called lithographic limestones; also known as a calcilutyte. | |
| Environment: | carbonate indet. |
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 33452 | ||
| Authorizer: | S. Holland | Enterer: | T. Hanson |
| Modifier: | S. Holland | Research group: | marine invertebrate |
| Created: | 2003-07-30 23:24:28 | Last modified: | 2024-03-31 19:20:47 |
| Access level: | the public | Released: | 2003-07-30 23:24:28 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 8880. | B. N. Cooper and C. E. Prouty. 1943. Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia. Bulletin of the Geological Society of America 54:819-886 [S. Holland/T. Hanson/T. Hanson] |