Overton Quarry #6 (Silurian of the United Kingdom)

Where: England, United Kingdom (52.5° N, 2.6° W: paleocoordinates 25.7° S, 12.3° W)

• small collection-level geographic resolution

When: Overton Formation, Ludfordian (425.6 - 423.0 Ma)

• Lower Whitcliffe Beds, the 2.26 m of sediment in the track section above Overton Quarry.

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, bioturbated, shelly/skeletal siltstone

• interbedded highly bioturbated calcareous siltstones in which most lamination destroyed by bioturbation. alternates with thin 'storm generated' siltstone and shell laminae. minor scour channels and slumping. occassional symmetric and asymmetric ripple laminae.

Primary reference: D. D. J. Antia. 1981. Faunas from the Upper Silurian (Upper Ludlovian) in the Ludlow-Much Wenlock District, England. Geological Journal 16:137-147 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 8325: authorized by John Alroy, entered by Mike Sommers on 06.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• 6161 total specimens for ALL 6 collections.
unclassified
  -
Ostracoda
 Podocopida -
 Palaeocopida -
Strophomenata
 Productida - Strophochonetidae
Rhynchonellata
 Athyridida - Dayiidae
 Rhynchonellida - Trigonirhynchiidae
 Orthida - Draboviidae
Salopina lunata Sowerby 1839
Polychaeta
 Serpulimorpha -
Bivalvia
 Ostreida - Pterineidae
 Cardiidia - Grammysiidae
Fuchsella amygdalina Sowerby 1827 clam
 Modiomorphida - Modiomorphidae
"Goniophora cymbaeformis" = Goniophora (Goniophora) cymbaeformis
"Goniophora cymbaeformis" = Goniophora (Goniophora) cymbaeformis Sowerby 1839 clam
 Protobranchia -
Gastropoda
 Murchisoniina - Loxonematidae
"Loxonema obsoletum" = Loxonema obsoleta
"Loxonema obsoletum" = Loxonema obsoleta de Sowerby and Murchison 1839 snail
unsure if typo or round-down
Cephalopoda
 Orthocerida - Orthoceratidae
Orthoceras sp. Breynius 1832
Stenolaemata
 Trepostomata -
Leioclema sp. Ulrich 1882
 Cystoporata - Ceramoporidae
Ceramopora sp. Hall 1851
Chondrichthyes
 Polyspondyli - Onchidae
Onchus sp. Agassiz 1837 shark