Second Abden Shale, Level 98 (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 - 326.4 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 6434: authorized by John Alroy, entered by Mike Sommers on 01.03.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Foraminifera
 Endothyroidea - Loeblichiidae
 Endothyroidea - Endothyridae
Rhodophyceae
  - Aoujgaliaceae
Stacheia sp. Brady 1876
 Coleoloida -
Gastropoda
 Bellerophontida - Bellerophontidae
"Bucaniopsis decussatus" = Retispira decussatus
"Bucaniopsis decussatus" = Retispira decussatus Fleming 1828 snail
 Neritoidea - Naticopsidae
Naticopsis sp. M'Coy 1844 snail
Bivalvia
 Pectinida - Pterinopectinidae
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
lamellibranch spat
Strophomenata
 Productida - Productellidae
Rhynchonellata
 Spiriferida - Ambocoeliidae
Crurithyris urei Fleming 1828
Lingulata
 Lingulida - Discinidae
Stenolaemata
 Cryptostomata - Fenestellidae
Ostracoda
 Platycopida - Paraparchitidae
 Podocopida - Bairdiidae
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily