Second Abden Shale, Level 84 (Carboniferous of the United Kingdom)

Where: Scotland, United Kingdom (56.1° N, 3.2° W: paleocoordinates 1.8° S, 2.5° E)

• small collection-level geographic resolution

When: Second Abden Shale Formation, Brigantian (336.0 - 330.9 Ma)

• Brigantian age was shown by Brindley and Spinner 1989, Proc. Yorkshire Geol. Soc. 47:215-231

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, silty, sandy shale

• Sediments were deposited in a gap between periods of volcanic activity, the series represents a transgression from tidal-flat to subtidal environment.
• thin sections of the shale show it to consist predominantly of clay minerals with varying admixtures of sand and silt sized particles, normally quartz but with some chlorite and feldspar...interlaminations of fine sandy material in their more argillaceous basic substance.

Collection methods: bulk, chemical, mechanical, peel or thin section, sieve,

Primary reference: L. Ferguson. 1962. The paleoecology of a Lower Carboniferous marine transgression. Journal of Paleontology 36:1090-1107 [J. Alroy/M. Sommers/J. Ju]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 6417: authorized by John Alroy, entered by Mike Sommers on 01.03.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
Chondrichthyes
 Euselachii -
Holmesella sp. elasmobranch
Bivalvia
 Ostreida - Pterineidae
 Pectinida - Pterinopectinidae
Gastropoda
 Bellerophontida - Bellerophontidae
"Bucaniopsis decussatus" = Retispira decussatus, "Bucaniopsis sp." = Bucanopsis
"Bucaniopsis decussatus" = Retispira decussatus Fleming 1828 snail
"Bucaniopsis sp." = Bucanopsis Ulrich and Scofield 1897 snail
nuclei
Rhynchonellata
 Orthida - Schizophoriidae
Strophomenata
 Productida - Productellidae
Ostracoda
 Podocopida - Bairdiidae
 Palaeocopida - Paraparchitidae
 Coleoloida -
Foraminifera
 Endothyroidea - Endothyridae
 Ammodiscoidea - Ammodiscidae
Glomospira sp. Rzehak 1895
Rhodophyceae
  - Aoujgaliaceae
Stacheia sp. Brady 1876