Coed Cochion (Ordovician of the United Kingdom)

Also known as Williams and Wright #5

Where: Wales, United Kingdom (51.8° N, 3.6° W: paleocoordinates 46.8° S, 17.6° W)

• small collection-level geographic resolution

When: Rawtheyan (448.8 - 445.2 Ma)

• no formation name given.

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, bioturbated, concretionary, pyritic, gray siltstone

• dark to blue-grey muddy siltstones weathering paler or mottled, with manganese stained surfaces. widely dispersed grains of quartz, feldspar, secondary pyrite up to 0.2 mm. bioturbation; nodules several cm diam;

Primary reference: A. Williams and A. D. Wright. 1981. The Ordovician-Silurian boundary in the Garth area of southwest Powys, Wales. Geological Journal 16:1-39 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8330: authorized by John Alroy, entered by Mike Sommers on 06.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cystoidea
  -
Cystoidea indet.
Cystoidea indet. von Buch 1846
cystoid
Rhynchonellata
 Atrypida - Anazygidae
? Zygospira sp.
? Zygospira sp. Hall 1862
Bivalvia
 Nuculida - Praenuculidae
Praenucula sp.
Praenucula sp. Pfab 1934 clam
Gastropoda
 Murchisoniina - Lophospiridae
Donaldiella sp., Lophospira sp.
Donaldiella sp. Cossmann 1903 snail
Lophospira sp. Whitfield 1886 snail
sp. C