Isorthis orbicularis Assoc., Upper Bringewood equivalent, Gwydderig area: Gorstian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Leptostrophiella filosa
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| synonym of Mesoleptostrophia | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Microsphaeridiorhynchus nucula
(Sowerby 1839)
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Rhynchonellata
- Rhynchonellida
- Hebetoechiidae
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Sphaerirhynchia wilsoni
(de Sowerby 1816)
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| [entered as Sphaerirhyncia wilsoni] | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Isorthis orbicularis
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| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | Wales |
| Coordinates: | 52.0° North, 4.0° West (view map) | ||
| Paleocoordinates: | 28.0° South, 13.7° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Ludlow |
| Stage: | Gorstian | 10 m.y. bin: | Silurian 2 |
| *International age/stage: | Late/Upper Gorstian | ||
| Key time interval: | Gorstian | ||
| Age range of interval: | 427.40000 - 425.60000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Upper Bringewood equivalent (Lower Cwm Clyd Beds of Potter and Price 1965). | |||||
Lithology and environment
| Primary lithology: | current ripples,"cross stratification",bioturbation,micaceous siltstone |
| Secondary lithology: | current ripples,"cross stratification",bioturbation sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "Occurs in micaceous, irregularly flaggy, coarse siltstones and fine sandstones with ripple cross-laminations and bioturbation" | |
| Environment: | marine indet. |
| Geology comments: "Probably a delta platform. Faunal density fairly low and diversity low, dominated by pedically attached and/or thick-shelled brachiopds. Shells mostly disarticulated." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Percent abundances are given. | |
Metadata
| Database number: | 23176 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2002-07-10 09:01:48 | Last modified: | 2018-11-26 18:14:43 |
| Access level: | the public | Released: | 2002-07-10 09:01:48 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6653. | J. D. Lawson. 1999. Atkins' Lower Bringewood associations of Wales and the Welsh Borderland. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 380-387 [M. Foote/M. Foote/M. Foote] |