NMB #10706 - Grand Bay Fm (Carriacou) (Miocene of Grenada)

Where: Grenada (12.5° N, 61.4° W: paleocoordinates 12.2° N, 61.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Grand Bay Formation, Middle Miocene (16.0 - 11.6 Ma)

• The principal, nominal sedimentary units of the mid-Tertiary succession of Carriacou are the Belmont Formation (lower Miocene), Kendeace Formation (lower Miocene), Carriacou Formation (middle Miocene) and Grand Bay Formation (middle Miocene). The collection originates from sandy facies of the Grand Bay Fm. Jung (1971) assigns this a Middle Miocene age based on faunal affinities with other circum-Caribbean units.

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified tuff

• Most collections of the Grand Bay Fm may have lived in inner shelf depths of 20-50 m, although some may be deeper, or at least have had shallow-water fauna transported offshore. The fauna of the tuffaceous facies appears to have been deposited in slightly shallower water and is here assigned a "transition zone/lw shoreface" environment.
• Tuffaceous facies. From specimens presented in photgraphic plates most material from Carriacou appears to be from poorly-lithified as opposed to cemented, or unconsolidated sediments. No information provided in text

Size class: macrofossils

Reposited in the NMB

• Naturhistorisches Museum, Basel, Switzerland.

Primary reference: P. Jung. 1971. Fossil mollusks from Carriacou, West Indies. Bulletins of American Paleontology 61(269):1-262 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 58678: authorized by Austin Hendy, entered by Austin Hendy on 20.02.2006, edited by Uta Merkel

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Mollusca. Later publications may list non-molluscan taxa from these units. These are not available at this time.
Show authors, comments, and common names
Anthozoa
 Scleractinia - Caryophylliidae
Caryophylliidae indet., Caryophyllia cf. communis
Caryophylliidae indet. Gray 1847 stony coral
 Scleractinia - Dendrophylliidae
Balanophyllia sp.
Balanophyllia sp. Wood 1844 stony coral
Gastropoda
 Epitonioidea - Epitoniidae
Sthenorytis grenadinarum
 Neogastropoda - Borsoniidae
Paraborsonia sp.
Paraborsonia sp. Pilsbry 1922 snail
 Neogastropoda - Conidae
Conus sp.
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Buccinidae
Cymatophos glareosus
Cymatophos glareosus Jung 1971 true whelk
Bivalvia
 Pectinida - Pectinoidae
Amusium sp.
Amusium sp. Röding 1798 scallop
 Ostreida - Ostreidae
Ostrea sp.
Ostrea sp. Linnaeus 1758 oyster
 Pholadida - Teredinidae
Kuphus cf. polythalamia
Kuphus cf. polythalamia Linnaeus 1767 clam
Caritoma antillarum
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Caritoma antillarum