Coombe Quarry, Mapperton, Bed 3a,b,c (Jurassic of the United Kingdom)

Where: United Kingdom (50.8° N, 2.7° W: paleocoordinates 39.8° N, 8.2° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Discites (171.6 - 167.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, lenticular, gray limestone and lithified, burrowed, ferruginous limestone

• 3a-limestone, dark grey, marly, indurated in lenticles, somewhat fissile, much limonitic weathering with clay lenticles; densely ironshot, the ooliths coarse, poorly sorted, in clouds through burrowing

•3b-limestone, very fine-grained, harder, dark grey weathering cream; densely ironshot, the ooliths uniform, small to medium-sized, dark brown

•3c-limestone, locally biosparitic, ferruginous, marly to argillaceous, strongly burrowed, much limonitic crust, occasional snuff-boxes; medium- to coarse-grained ironshot, in cloudy distribution, with pockets of very coarse, light brown ooliths in grey matrix, as in the snuff-box bed at Burton Bradstock

Size class: macrofossils

Primary reference: R. Chandler and J. Callomon. 2009. The Inferior Oolite at Coombe Quarry, near Mapperton, Dorset, and a new Middle Jurassic ammonite faunal horizon, Aa-3b, Leioceras comptocostosum n.biosp. in the Scissum Zone of the Lower Aalenian. Proceedings of the Dorset Natural History and Archaeological Society 130:99-132 [M. Aberhan/T. Schossleitner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 141363: authorized by Martin Aberhan, entered by Thomas Schossleitner on 26.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Pectinoidae
 Pectinida - Limidae
 Ostreida - Malleidae
Isognomon bathonicus oyster
Isognomon [‘Gervillia’] bathonicus
 Trigoniida - Trigoniidae
Cephalopoda
 Ammonitida - Graphoceratidae
 Ammonitida - Sonniniidae
 Ammonitida - Hammatoceratidae
 Ammonitida - Oppeliidae
 Ammonitida - Otoitidae
Docidoceras sp. ammonite
Emileia sp. ammonite
Emileia sp.nov.
 Ichnofossils -
Gastrochaenolites lapidicus Kelly and Bromley 1984