East of Cribarth (Ordovician of the United Kingdom)
Where: Wales, United Kingdom (51.8° N, 3.6° W: paleocoordinates 46.8° S, 17.6° W)
• small collection-level geographic resolution
When: Rawtheyan (448.8 - 445.2 Ma)
• no formation name given.
• member-level stratigraphic resolution
Environment/lithology: offshore; lithified, bioturbated, concretionary, pyritic, gray siltstone
• dark to blue-grey muddy siltstones weathering paler or mottled, with manganese stained surfaces. widely dispersed grains of quartz, feldspar, secondary pyrite up to 0.2 mm. bioturbation; nodules several cm diam;
Primary reference: 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]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 8366: authorized by John Alroy, entered by Mike Sommers on 10.07.2000
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Pterobranchia | |
|
? Glyptograptus sp. graptolite | |
"Diplograptus cf. fastigatus" = Orthograptus fastigatus
"Diplograptus cf. fastigatus" = Orthograptus fastigatus Davies 1929 graptolite | |
| Crinoidea | |
|
Crinoidea indet. Miller 1821 Sea lily | |
| Gastropoda | |
|
| |
|
Lophospira sp. Whitfield 1886 snail | |
|
Loxonema sp. Phillips 1841 snail | |
|
Tropidodiscus sp. Meek and Worthen 1866 snail | |
|
? Cyclonema sp. Hall 1852 snail | |
| Bivalvia | |
|
Praenucula sp. Pfab 1934 clam | |
| Strophomenata | |
|
Leangella sp. Opik 1933 | |
| Rhynchonellata | |
|
Cyclospira sp. Hall and Clarke 1893 | |
| Tentaculita | |
|
Cornulites sp. Schlotheim 1820 | |
| Trilobita | |
|
Trilobita indet. Walch 1771 trilobite | |
|
Tretaspis sp. M'Coy 1849 trilobite | |
| Deuteropoda | |
|
Ostracoda indet. Latreille 1802 ostracod | |