NMB #10704 - Grand Bay Fm (Carriacou): Middle Miocene, Grenada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Scleractinia - Pocilloporidae
Pocillopora cf. baracoaensis Vaughan 1919
Stylophora monticulosa Vaughan and Hoffmeister 1925
Stylophora cf. imperatoris Vaughan 1919
Anthozoa - Scleractinia - Merulinidae
Montastrea limbata (Duncan 1863)
recombined as Orbicella limbata
Bivalvia - Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758
Bivalvia - Carditida - Crassatellidae
Eucrassatella sp. Iredale 1924
Bivalvia - Pholadida - Teredinidae
Kuphus cf. polythalamia (Linnaeus 1767)
Gastropoda - Heterostropha - Camaenidae
Pleurodonte (Pleurodonte) lehneri
Gastropoda - Turritellidae
Turritella (Bactrospira) altilira (Conrad 1857)
Subspecies: Turritella (Bactospira) altilira altilira
Gastropoda - Neogastropoda - Olividae
Oliva (? Strephonella) delata Jung 1971
Gastropoda - Neogastropoda - Conidae
Conus sp. Linnaeus 1758
Gastropoda - Neogastropoda - Terebridae
Strioterebrum sp. Sacco 1891
see common names

Geography
Country:Grenada
Coordinates: 12.5° North, 61.4° West (view map)
Paleocoordinates:12.2° North, 61.1° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
Key time interval:Middle Miocene
Age range of interval:15.98000 - 11.63000 m.y. ago
Stratigraphy
Formation:Grand Bay
Local section:Point St Hilaire
Stratigraphic resolution:bed
Stratigraphy comments: 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.
Lithology and environment
Primary lithology: poorly lithified tuff
Includes fossils?Y
Lithology description: 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
Environment:transition zone/lower shoreface
Geology comments: 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.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:field collection,survey of museum collection
Reason for describing collection:taxonomic analysis
Museum repositories:NMB
Collection method comments: Naturhistorisches Museum, Basel, Switzerland.
Taxonomic list comments:Exhaustive for Mollusca. Later publications may list non-molluscan taxa from these units. These are not available at this time.
Metadata
Database number:58677
Authorizer:A. Hendy, W. Kiessling Enterer:A. Hendy, U. Merkel
Research group:marine invertebrate
Created:2006-02-20 10:25:45 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-02-20 10:25:44
Creative Commons license:CC BY
Reference information

Primary reference:
16650. P. Jung. 1971. Fossil mollusks from Carriacou, West Indies. Bulletins of American Paleontology 61(269):1-262 [A. Miller/A. Hendy]