Second Abden Shale, Level 106 (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 6444: authorized by John Alroy, entered by Mike Sommers on 02.03.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Foraminifera
 Ammodiscoidea - Ammodiscidae
Glomospira sp. Rzehak 1895
 Endothyroidea - Endothyridae
Endothyra sp.
sp. globulus/radiata
Rhodophyceae
  - Aoujgaliaceae
Stacheia sp. Brady 1876
Anthozoa
 Stauriida - Hapsiphyllidae
Gastropoda
 Murchisoniina - Soleniscidae
"Soleniscus (Macrochilina) brevis" = Strobeus brevis
"Soleniscus (Macrochilina) brevis" = Strobeus brevis White 1881 snail
sgn. (Macrochilina)
Strophomenata
 Productida - Productellidae
Rhynchonellata
 Orthida - Schizophoriidae
Schizophoria sp. King 1850
 Spiriferida - Ambocoeliidae
Crurithyris urei Fleming 1828
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata - Septoporidae
 Cryptostomata - Fenestellidae
 Trepostomida - Stenoporidae
Ostracoda
 Platycopida - Paraparchitidae
 Podocopida - Bairdiidae
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily