Second Abden Shale, Level 83 (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 6416: authorized by John Alroy, entered by Mike Sommers on 01.03.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
 Coleoloida -
Rhynchonellata
 Spiriferida - Ambocoeliidae
Crurithyris urei Fleming 1828
 Orthida - Schizophoriidae
Strophomenata
 Productida - Productellidae
Lingulata
 Lingulida - Discinidae
Bivalvia
 Ostreida - Pterineidae
Gastropoda
 Heterostropha - Donaldinidae
"Aclisina pulchra" = Donaldina pulchra
"Aclisina pulchra" = Donaldina pulchra de Koninck 1881 snail
var. intermedia
 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
 Murchisoniina - Soleniscidae
"Soleniscus (Macrochilina) brevis" = Strobeus brevis
"Soleniscus (Macrochilina) brevis" = Strobeus brevis White 1881 snail
sgn. (Macrochilina)
Ostracoda
 Platycopida - Paraparchitidae
 Podocopida - Bairdiidae
Foraminifera
 Ammodiscoidea - Ammodiscidae
Glomospira sp. Rzehak 1895
 Endothyroidea - Endothyridae
Rhodophyceae
  - Aoujgaliaceae
Stacheia sp. Brady 1876