Second Abden Shale, Level 64 (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 6397: authorized by John Alroy, entered by Mike Sommers on 01.03.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Foraminifera
 Ammodiscoidea - Ammodiscidae
Glomospira sp. Rzehak 1895
Gastropoda
 Murchisoniina - Gosseletinidae
? Glabrocingulum sp. Thomas 1940 snail
nuclei
 Bellerophontida - Bellerophontidae
"Bucaniopsis decussatus" = Retispira decussatus
"Bucaniopsis decussatus" = Retispira decussatus Fleming 1828 snail
 Heterostropha - Donaldinidae
"Aclisina pulchra" = Donaldina pulchra
"Aclisina pulchra" = Donaldina pulchra de Koninck 1881 snail
var. intermedia
Bivalvia
 Ostreida - Pterineidae
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
lamellibranch spat
Strophomenata
 Productida - Productellidae
Rhynchonellata
 Orthida - Schizophoriidae
Schizophoria sp. King 1850
 Spiriferida - Ambocoeliidae
Crurithyris sp. George 1931
Crurithyris urei Fleming 1828
Lingulata
 Lingulida - Lingulidae
Lingula squamiformis Phillips 1836
 Lingulida - Discinidae
Ostracoda
 Platycopida - Paraparchitidae
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
unclassified
  -
Vertebrata indet. Lamarck 1801
"fish" remains