Second Abden Shale, Level 82 (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 6415: authorized by John Alroy, entered by Mike Sommers on 01.03.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Glomspira sp., Rastidiscus sp., Stacheiodes sp.
Foraminifera
 Endothyroidea - Endothyridae
Plectogyra baileyi
Rhodophyceae
  - Aoujgaliaceae
Stacheia sp.
Stacheia sp. Brady 1876
Chondrichthyes
 Euselachii -
Holmesella sp.
Holmesella sp. elasmobranch
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
Ostracoda
 Palaeocopida - Paraparchitidae
Paraparchites okeni
 Podocopida - Bairdiidae
Bairdia hisingeri
Gastropoda
 Murchisoniina - Gosseletinidae
? Glabrocingulum sp.
? Glabrocingulum sp. Thomas 1940 snail
nuclei
 Murchisoniina - Soleniscidae
"Soleniscus (Macrochilina) brevis" = Strobeus brevis
"Soleniscus (Macrochilina) brevis" = Strobeus brevis White 1881 snail
sgn. (Macrochilina)
 Bellerophontida - Bellerophontidae
"Bucaniopsis decussatus" = Retispira decussatus
"Bucaniopsis decussatus" = Retispira decussatus Fleming 1828 snail
 Neritoidea - Naticopsidae
Naticopsis sp.
Naticopsis sp. M'Coy 1844 snail
Bivalvia
 Ostreida - Pterineidae
Actinopteria fluctuosa
Rhynchonellata
 Orthida - Schizophoriidae
Schizophoria sp., Schizophoria resupinata
Schizophoria sp. King 1850
 Spiriferida - Ambocoeliidae
Crurithyris urei
Crurithyris urei Fleming 1828
 Coleoloida -
Ortonia carbonaria