East flank of east of Wenallt #3: Hirnantian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Pelmatozoa indet.
Leuckart 1848
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6 elements | |||||||||
| pelmatozoan ossicles | ||||||||||
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Cystoidea
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Cystoidea indet.
von Buch 1846
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1 element | |||||||||
| cystoid plate | ||||||||||
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Trilobita
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Trilobita indet.
Walch 1771
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1 specimen | |||||||||
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Rhynchonellata
- Orthida
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Orthacea indet.
Woodward and Schuchert 1852
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1 specimen | |||||||||
| replaced by Orthoidea | ||||||||||
| orthacean | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Dalmanella testudinaria
(Dalman 1828)
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2 specimens | |||||||||
| original and current combination Orthis testudinaria | ||||||||||
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Rhynchonellata
- Athyridida
- Meristellidae
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Hindella incipiens
(Williams 1951)
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2 specimens | |||||||||
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Strophomenata
- Orthotetida
- Triplesiidae
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Cliftonia sp.
Foerste 1909
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2 specimens | |||||||||
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Eostropheodonta hirnantensis
(M'Coy 1851)
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1 specimen | |||||||||
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena rugosa
Dalman 1828
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1 specimen | |||||||||
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Strophomenata
- Strophomenida
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Strophomenacea indet.
King 1846
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1 specimen | |||||||||
| replaced by Strophomenoidea | ||||||||||
| strophomenacean | ||||||||||
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Stenolaemata
- Cryptostomata
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Cryptostomata indet.
Vine 1884
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13 specimens | |||||||||
| cryptostome | ||||||||||
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Stenolaemata
- Cryptostomata
- Escharoporidae
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Escharopora sp.
Hall 1847
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3 specimens | |||||||||
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Stenolaemata
- Trepostomata
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Trepostomata indet.
Ulrich 1882
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2 specimens | |||||||||
| trepostome | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | Wales |
| Coordinates: | 51.8° North, 3.6° West (view map) | ||
| Paleocoordinates: | 39.1° South, 17.0° West | ||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | Epoch: | Late Ordovician |
| Stage: | Hirnantian | 10 m.y. bin: | Ordovician 5 |
| *Period: | Late/Upper Ordovician | *Epoch: | Ashgill |
| Key time interval: | Hirnantian | ||
| Age range of interval: | 445.2 - 443.8 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | ooidal,shelly/skeletal lithified argillaceous,sandy siltstone |
| Secondary lithology: | sandstone |
| Lithology description: sandy and muddy siltstones with ooids alternating with fine to very fine speckly sandstones. abundant fragmentary pelmatozoan and bryozoan material. | |
| Environment: | offshore |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 8388 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers | Research group: | marine invertebrate |
| Created: | 2000-07-10 16:54:34 | Last modified: | 2000-07-10 19:54:34 |
| Access level: | the public | Released: | 2000-11-20 13:53:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 571. | A. Williams and A. D. Wright. 1981. The Ordovician-Silurian boundary in the Garth area of southwest Powys, Wales. Geological Journal 16:1-39 [J. Alroy/M. Sommers/P. Wagner] |