SB04A: Rhuddanian - Aeronian, United Kingdom
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Strophomenata
- Strophomenida
- Leptestiidae
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Leangella scissa
(Davidson 1871)
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5 specimens | |||||||||
Rhynchonellata
- Orthida
- Hesperorthidae
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Dolerorthis sowerbyiana
(Davidson 1869)
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1 specimen | |||||||||
Rhynchonellata
- Orthida
- Rhipidomellidae
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Mendacella mullockiensis
(Davidson 1869)
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7 specimens | |||||||||
"llandoveriana morph" | ||||||||||
Rhynchonellata
- Protorthida
- Skenidiidae
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Skenidioides ? woodlandiense
(Davidson 1882)
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2 specimens | |||||||||
recombined as Skenidioides woodlandiensis | ||||||||||
see common names |
Geography
Country: | United Kingdom | State/province: | Wales | County: | Powys |
Coordinates: | 52.7° North, 3.3° West (view map) | ||||
Paleocoordinates: | 35.0° South, 16.6° West | ||||
Basis of coordinate: | based on nearby landmark | ||||
Geographic resolution: | small collection |
Time
Period: | Silurian | Epoch: | Llandovery |
10 m.y. bin: | Silurian 1 | ||
*Period: | Early/Lower Silurian | *Epoch: | Early/Lower Llandovery - Middle Llandovery |
*International age/stage: | Late/Upper Rhuddanian - Late/Upper Aeronian | ||
Key time interval: | Rhuddanian - Aeronian | ||
Age range of interval: | 443.80000 - 438.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Unless a conodont zone was explicitly stated, a Late Rhudd - Late Aeron age was entered because of the statement these beds are all "pre-sedgwickii Zone." |
Lithology and environment
Primary lithology: | lithified mudstone |
Secondary lithology: | sandstone |
Environment: | marine indet. |
Taphonomy
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | bulk,field collection |
Reason for describing collection: | taxonomic analysis |
Collection method comments: "... a single collection (from bulk material) [was made] from each locality, identifying and recording all fossils encountered during break up of the rock... [sacrificing commoner taxa in continued searching, or preserving rarer specimens and not breaking the rock further]...figures obtained for relative frequencies of the taxa are prob accurate...estimates of volumetric abundance...are prob too low." Sample 1.8 kg | |
Taxonomic list comments:"Brachiopods... form the overwhelming preponderance of early Llandovery shelly faunas in Wales." |
Metadata
Database number: | 4938 | ||
Authorizer: | J. Alroy | Enterer: | M. Sommers |
Modifier: | C. Visaggi | Research group: | marine invertebrate |
Created: | 1999-08-26 16:44:00 | Last modified: | 2004-03-11 16:25:07 |
Access level: | the public | Released: | 2000-11-20 13:53:24 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
196. | J. T. Temple. 1987. Early Llandovery brachiopods of Wales. Palaeontological Society Monographs 139(572):1-137 [J. Alroy/M. Sommers/M. Uhen] |