St. Audrie's Bay, 7.2 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 78460: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 07.02.2008, edited by Loic Villier

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ophiurida -
Ophiolepis damesi Wright 1874 brittle star
 Murchisoniina - Zygopleuridae
 Mytilida - Mytilidae
Modiolus sp. Lamarck 1801 mussel
"Modiolus hillanus" = Modiolus (Cyranus) hillanus Sowerby 1818 mussel
 Ostreida - Pteriidae
Rhaetavicula contorta Portlock 1843 pearl oyster
 Ostreida - Bakevelliidae
 Ostreida - Cassianellidae
Cassianella sp. Beyrich 1862 oyster
 Pectinida - Pectinoidae
"Chlamys valoniensis" = Praechlamys valoniensis
"Chlamys valoniensis" = Praechlamys valoniensis Defrance 1825 scallop
 Cardiida - Arcticidae
 Cardiida - Cardiidae
Protocardia rhaetica Merian 1853 cockle
 Nuculanida - Nuculanidae
"Dacryomya sp." = Dacromya
"Dacryomya sp." = Dacromya Agassiz 1840 pointed nut clam