Barnley Beck (i), Colsterdale (Carboniferous of the United Kingdom)

Where: England, United Kingdom (54.1° N, 1.8° W: paleocoordinates 1.0° S, 6.2° E)

• small collection-level geographic resolution

When: E2 zone, lowest (i) division Member (Colsterdale Marine Beds Formation), Arnsbergian (326.4 - 318.1 Ma)

• Bisat (1914) referred to the marine strata as the Colsterdale Marine Beds, a term retained in this account.

• member-level stratigraphic resolution

Environment/lithology: marine; lithified, ferruginous, gray, argillaceous shale and ironstone

• Paleoenvironment could possibly be paralic or deltaic. There are a lot of preserved wood fragments and other plant remains. It was definitely near-shore, also definitely marine (according to the authors).
• predominantly gray and black shales intercalated with a thin limestone which locally degenerates into a band of calcareous nodules. (i) shales with nuculid-gastropod fauna: dark grey and purplish soapy shales with clay-ironstone nodules.

Primary reference: A. A. Wilson and A. T. Thompson. 1959. Marine bands of Arnsbergian age (Namurian) in the south-eastern portion of the Askrigg Block, Yorkshire. Proceedings of the Yorkshire Geological Society 32(3):45-68 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8443: authorized by John Alroy, entered by Mike Sommers on 12.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
orthocone nautiloid
 Goniatitida - Cravenoceratidae
? Cravenoceras sp. Bisat 1928 ammonite
Gastropoda
 Murchisoniina - Gosseletinidae
Turbonellina sp. de Koninck 1844 snail
 Bellerophontida - Euphemitidae
Euphemites sp. Warthin 1930 snail
Bivalvia
 Pholadomyida - Edmondiidae
Scaldia sp. de Ryckholt 1847 clam
 Nuculida - Nuculidae
 Nuculanida - Nuculanidae
"Leda attenuata" = Nuculana
"Leda attenuata" = Nuculana pointed nut clam
Deuteropoda
  -
? Ostracoda indet. Latreille 1802 ostracod
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
stem
Osteichthyes
 Palaeonisciformes - Palaeoniscidae
Palaeoniscidae indet. Vogt 1852
palaeoniscid scale