St. Audrie's Bay, 10.5 m, Somerset, SW England (Triassic of the United Kingdom)

Where: United Kingdom (51.2° N, 3.3° W: paleocoordinates 35.5° N, 0.5° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Westbury Formation, Rhaetian (208.5 - 201.3 Ma)

• distance above base of Wilton member, Blue Anchor Fm.; Rhaetipollis germanicus Zone

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, gray mudstone

• The sediments of the Westbury Fm. were deposited in a storm-dominated, shallow epeiric sea. The mudstones were deposited either in quiet offshore waters or in restricted lagoons subject to fluctuating salinity.
• dark grey siliciclastic mudstone

Size class: macrofossils

Collection methods: bulk, mechanical,

• Housed in the Department of Earth Sciences, University of Bristol.

Primary reference: L. Mander, R. J. Twitchett, and M. J. Benton. 2008. Palaeoecology of the Late Triassic extinction event in the SW UK. Journal of the Geological Society, London 165:319-332 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 78472: authorized by Martin Aberhan, entered by Sabine Nürnberg on 07.02.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
"Chlamys valoniensis" = Praechlamys valoniensis
"Chlamys valoniensis" = Praechlamys valoniensis Defrance 1825 scallop
 Pectinida - Plicatulidae
"Placunopsis alpina" = Pseudoplacunopsis alpina
"Placunopsis alpina" = Pseudoplacunopsis alpina Winkler 1859 scallop
 Ostreida - Pteriidae
Rhaetavicula contorta Portlock 1843 pearl oyster
 Mytilida - Mytilidae
 Cardiida - Arcticidae
Isocyprina sp. Röder 1882 clam
Isocyprina ewaldi Bornemann 1854 clam
 Cardiida - Cardiidae
Protocardia rhaetica Merian 1853 cockle
 Carditida - Cardiniidae
 Nuculanida - Polidevciidae
Ryderia sp. Wilton 1930 clam