ammonites
Dearden Moor, Gastrioceras cumbriense Marine Band, shale Unit 4 (Carboniferous to of the United Kingdom)

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 0.8° S, 6.6° 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

• The regression is marked by a return to conditions similar to those of the advance. A hard, dark grey shale is developed...

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-NC-ND (attribution-noncommercial-no derivatives)