Also known as Dearden Moor, Gastrioceras cumbriense Marine Band, shale Unit 4, the retreat shales
Where: England, United Kingdom (53.7° N, 2.3° W: paleocoordinates 1.1° S, 6.3° E)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Namurian Series Formation, Pendleian to Pendleian (326.4 - 314.6 Ma)
• The Gastrioceras cumbriense Marine Band generally does not exceed 60cm in thickness. The band is split into five units, the lower barren shales (Unit 1), the advance shales (Unit 2), the acme shales (Unit 3), the retreat shales (Unit 4), and the upper barren shales (Unit 5).
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified, gray shale
Size class: macrofossils
Primary reference: P. B. Wignall. 1987. A biofacies analysis of the Gastroceras cumbriense marine band (Namurian) of the central Pennines. Proceedings of the Yorkshire Geological Society 46(2):111-121 [J. Alroy/C. Simpson/C. Simpson]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 41223: authorized by John Alroy, entered by Carl Simpson on 09.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
| |
Polypodiopsida | |
cf. Calamites sp. Suckow 1784 | |
Bivalvia | |
Caneyella cf. multirugata oyster | |
Posidonia insignis oyster | |
Dunbarella elegans scallop | |
Aviculopecten sp. M'Coy 1851 scallop | |
Gastropoda | |
| |
Ptychomphalus sp. Agassiz 1839 snail | |
Angyomphalus sp. Cossmann 1915 snail | |
Cephalopoda | |
Anthracoceratites sp. Ramsbottom 1970 ammonite | |
Gastrioceras cumbriense ammonite
Gastrioceras crenulatum ammonite
Gastrioceras aff. subcrenatum ammonite | |
Metacoceras sp. Hyatt 1883 nautiloid | |
Gnathostomata | |
| |
Chondrichthyes | |
| |
Crinoidea | |
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