Overton Quarry #1 (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)

• Upper Leintwardine Beds, basal 2.04 m section.

• 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 8320: 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
  -
Trilobita
 Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844 trilobite
[entered as Encrinuris sp.]
 Phacopida - Calymenidae
Calymene sp. Brongniart 1822 trilobite
Ostracoda
 Podocopida - Bairdiocyprididae
 Palaeocopida -
 Platycopida - Cavellinidae
Cavellina sp. ostracod
Hyolitha
 Hyolithida - Hyolithidae
Strophomenata
 Productida - Strophochonetidae
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
 Strophomenida - Shaleriidae
"Shaleria ornatella" = Shaleria (Janiomya) ornatella
"Shaleria ornatella" = Shaleria (Janiomya) ornatella Davidson 1871
Rhynchonellata
 Athyridida - Dayiidae
Dayia navicula Sowerby 1839
 Spiriferida - Delthyrididae
Howellella elegans Muir-Wood 1925
 Atrypida - Atrypidae
Atrypa reticularis Linnaeus 1758
 Rhynchonellida - Hebetoechiidae
Sphaerirhynchia wilsoni de Sowerby 1816
 Orthida - Draboviidae
Salopina lunata Sowerby 1839
Lingulata
 Lingulida - Disciniidae
 Lingulida - Lingulidae
Craniata
 Craniopsida - Craniopsidae
Polychaeta
 Eunicemorpha -
 Serpulimorpha -
Bivalvia
 Ostreida - Pterineidae
 Cardiidia - Grammysiidae
Fuchsella amygdalina Sowerby 1827 clam
Tentaculita
 Cornulitida - Cornulitidae
Cornulites sp. Schlotheim 1820
Cephalopoda
 Orthocerida - Orthoceratidae
Orthoceras sp. Breynius 1832
 Orthoceratoidea - Paraphragmitidae
Stenolaemata
 Trepostomata -
Leioclema sp. Ulrich 1882
 Cystoporata - Ceramoporidae
Ceramopora sp. Hall 1851
Conodonta
 Ozarkodinida -
Ozarkodina sp. Branson and Mehl 1933 conodont
Osteichthyes
 Ischnacanthiformes -