Marston Magna, bed A (Jurassic of the United Kingdom)

Where: Somerset, United Kingdom (51.0° N, 2.6° W: paleocoordinates 37.7° N, 4.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Obtusum (196.5 - 189.6 Ma)

• Stellare subzone, presumed Asteroceras blakei biohorizon

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary shale

• Constant layer of large septarian nodules, typically 0.7 m in diameter and no more than 2 m apart from each other.

Size class: macrofossils

Reposited in the OUM

Primary reference: M. Edmunds, J. Whicher, P. Langham and R. B. Chandler. 2016. A systematic account of the ammonite faunas of the Obtusum Zone (Sinemurian Stage, Lower Jurassic) from Marston Magna, Somerset, UK. Proceedings of the Geologists' Association 127:146-171 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 179698: authorized by Matthew Clapham, entered by Matthew Clapham on 26.06.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Asteroceratidae
Asteroceras blakei
Asteroceras blakei Spath 1925 ammonite
 Ammonitida - Eoderoceratidae
Promicroceras planicosta
Promicroceras planicosta Sowerby 1814 ammonite