S. wilsoni-I. orbicularis-M. nucula Association of 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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Echinodermata indet.
Klein 1754
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| pelmatozoans; skeletal sand | ||||||||||
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Strophomenata
- Strophomenida
- Strophochonetidae
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Shagamella minor
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Protochonetes ludloviensis
Muir-Wood 1962
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Rhynchonellata
- Spiriferida
- Delthyrididae
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Howellella elegans
Muir-Wood 1925
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Rhynchonellata
- Athyridida
- Hyattidinidae
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Hyattidina canalis
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Rhynchonellata
- Athyridida
- Dayiidae
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Dayia navicula
(Sowerby 1839)
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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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Rhynchonellata
- Orthida
- Draboviidae
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Salopina lunata
(Sowerby 1839)
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Rhynchonellata
- Orthida
- Dalmanellidae
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Isorthis orbicularis
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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| skeletal sand | ||||||||||
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Bivalvia
- Grammysiidae
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Fuchsella amygdalina
(Sowerby 1827)
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| see common names | ||||||||||
Geography
| Country: | United Kingdom | State/province: | England |
| Coordinates: | 52.0° North, 2.0° West (view map) | ||
| Paleocoordinates: | 26.1° South, 11.8° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | basin |
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: | Lower Leintwardine |
| Stratigraphic resolution: | formation |
Lithology and environment
| Primary lithology: | calcareous siltstone |
| Secondary lithology: | grainstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "...calcareous siltstone...also limestone [with] winnowed skeletal sands" | |
| Environment: | marine indet. |
| Geology comments: "Subtidal inshore shelf in calcareous siltstone facies, affected by numerous higher energy, relatively minor storm disturbances. Intense endofaunal reworking...Also in the higher part of the Aymestry lst. facies in the Wenlock Edge area, where winnowed skeletal sands of moderate to high current energy were depositedin carbonate swell environments of more offshore areas...In the lower part...high current energy, widespread limestone conglomerates which include in situ hardgrounds are characterized by this same fauna...
[with some evidence from algae and stromatolites that water may have become shallow]." | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 23109 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2002-07-09 14:57:34 | Last modified: | 2018-11-26 18:07:25 |
| Access level: | the public | Released: | 2002-07-09 14:57:34 |
| 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] |