Aegiria grayi-Neobeyrichia spp. Association in Wales and Welsh Borderland: Ludfordian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Neobeyrhicia nutans
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Echinodermata indet.
Klein 1754
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| pelmatozoan columnals | ||||||||||
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Rhynchonellata
- Athyridida
- Dayiidae
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Dayia navicula
(Sowerby 1839)
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Strophomenata
- Strophomenida
- Aegiromenidae
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Aegiria grayi
(Davidson 1849)
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| recombined as Jonesea grayi | ||||||||||
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Ostracoda
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Ostracoda indet.
Latreille 1802
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Ostracoda
- Palaeocopida
- Beyrichiidae
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Neobeyrichia lauensis
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| synonym of Beyrichia | ||||||||||
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Neobeyrichia scissa
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| synonym of Beyrichia | ||||||||||
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Neobeyrichia confluens
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| synonym of Beyrichia | ||||||||||
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Trilobita
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Trilobita indet.
Walch 1771
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Trilobita
- Phacopida
- Calymenidae
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Calymene puellaris
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Trilobita
- Phacopida
- Encrinuridae
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Encrinurus stubblefieldi
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| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | England |
| Coordinates: | 52.0° North, 3.0° West (view map) | ||
| Paleocoordinates: | 26.2° South, 12.5° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Ludlow |
| Stage: | Ludfordian | 10 m.y. bin: | Silurian 2 |
| *International age/stage: | Early/Lower Ludfordian | ||
| Key time interval: | Ludfordian | ||
| Age range of interval: | 425.60000 - 423.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Leintwardine | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: High Lower Leintwardine to Upper Leintwarding | |||||
Lithology and environment
| Primary lithology: | bioturbation calcareous siltstone |
| Lithology description: "...occurs in calcareous siltstone facies, particularly the more thickly flaggy variety, in intermediate facies to the latter from the laminated siltstone facies, and in poorly calcareous facies of the SW basin...In offshore shelf areas, thin phosphatized conglomeratic horizons at this level represent subtidal lags during periods of low sedimentation...i" | |
| Environment: | marine indet. |
| Geology comments: "Wide facies distribution through limited stratigraphical interval in mid-shelf to trough areas...Overlaps to some extent with Shaleria ornatella Ass. of mid-shelf areas but uncommon in inshore shelf...small skeletal grains associated with fine skeletal debris, in thin skeletal sand layers of limited extend and only moderate energy...In most areas associated with bioturbated sediments that indicate an active soft-bottom endofauna...This is BA 3 or more offshore...BA 3 or 4 most likely...Aegiria normally occurs in the BA 4-5 postition." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 23113 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2002-07-09 15:47:13 | Last modified: | 2018-11-26 18:08:38 |
| Access level: | the public | Released: | 2002-07-09 15:47:13 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6652. | L. Cherns. 1999. Faunal associations of the Lower Leintwardine Formation of the Anglo-Welsh Basin. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 373-379 [M. Foote/M. Foote/M. Foote] |