Somerset Formation (Eocene of Jamaica)

Where: Jamaica (18.2° N, 77.0° W: paleocoordinates 16.9° N, 76.5° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Somerset Formation (Yellow Limestone Group), Late/Upper Eocene (37.2 - 33.9 Ma)

• The Somerset is equivalent in age to the Gibraltar FM, both of which occur in the upper part of the White Limestone Supergroup of Jamaica.

• formation-level stratigraphic resolution

Environment/lithology: lagoonal; lithified limestone

Primary reference: S. K. Donovan. 1994. Echinoids of the Upper Eocene Somerset Formation of Jamaica. Tertiary Research 15(2):43-48 [L. Ivany/E. Kowalski]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 8122: authorized by Linda Ivany, entered by Elizabeth Kowalski on 22.06.2000, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• Echinoids only
Echinoidea
 Cassiduloida - Neolampadidae
Eurhodia matleyi sea urchin
 Clypeasteroida - Neolaganidae
Bivalvia
 Arcida - Arcidae
Barbatia sp. Gray 1842 clam
 Cardiida - Cardiidae
Sawkinsia matleyi Cox 1941 cockle
Gastropoda
 Neritoidea - Neritidae
Velates sp. Montfort 1810 snail
 Opisthobranchia - Bullidae
Bulla sp. Linnaeus 1758 snail
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Sorbeoconcha - Naticidae
Natica sp. Scopoli 1777 moon snail
 Sorbeoconcha - Xenophoridae
Xenophora sp. Fischer von Waldheim 1807 carrier shell
 Sorbeoconcha - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Mitridae
Mitra sp. Lamarck 1798 mitre shell