Overton Quarry #4 (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, 3.66 - 6.30 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 8323: 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.
Ostracoda
 Palaeocopida -
Strophomenata
 Strophomenida - Strophochonetidae
Rhynchonellata
 Athyridida - Dayiidae
Dayia navicula Sowerby 1839
 Rhynchonellida - Trigonirhynchiidae
 Orthida - Draboviidae
Salopina lunata Sowerby 1839
Bivalvia
 Ostreida - Pterineidae
 Cyrtodontida - Cardiolidae
Cephalopoda
 Orthoceratoidea - Paraphragmitidae