NMB Locality 16825 - Rio Cana: Late Miocene - Early Pliocene, Dominican Republic

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Portunidae
see common names

Geography
Country:Dominican Republic
Coordinates: 19.5° North, 71.3° West (view map)
Paleocoordinates:20.3° North, 69.3° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Time
Period: Neogene Epoch: Miocene - Pliocene
10 m.y. bin: Cenozoic 6
Key time interval: Late Miocene - Early Pliocene
Age range of interval: 11.63 - 3.6 m.y. ago
Stratigraphy
Geological group:Yaque Formation:Gurabo Member:Bedded Siltstone A
Stratigraphy comments: Overlying Formation: Mao Formation. Underlying Formation: Cercado Formation. Thickness: 268 m. (Saunders et al., 1986; Lutz et al., 2008; and McNeill et al., 2012 for revised thickness).
Lithology and environment
Primary lithology:massive,burrows,rubbly silty siltstone
Lithology description: Saunders et al., 1986, describes this locality as "as scattered in silts with indurated layers." This would still be considered the lower Gurabo section on Rio Cana whether you went by Saunders et al, 1986 (276 ft), or McNeill et al, 2012 (232 ft). The section has massive to irregularly bedded rubbly silt with corals, bryozoa, mollusks and prominent Sphaerogypsina. It also has some layers thick with burrows. It is shallow water, and has evidence of marine grasses according to Waller 2011.
Environment:coastal indet.
Geology comments: Saunders et al., 1986, generally says of this area that the water depths must have been less than 30 meters, and that it was a shallow marine, clear-water environment because of the presence of Platy Reef Corals with common Agaricia. There are also Amphistegina, Sphaerogypsina, Planorbulina, and frequent miliolids. This sentiment is echoed by Waller (2011), who says that the Pectinid assemblages in the Río Cana sections support the current understanding that this section on the whole represents shallower water than the Río Gurabo section, and also contains sea grasses.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:228626
Authorizer:J. Wolfe Enterer:A. Lynch
Created:2022-12-18 18:05:14 Last modified:2025-02-22 15:12:02
Access level:the public Released:2022-12-18 18:05:14
Creative Commons license:CC0
Reference information

Primary reference:
34337. J. S. H. Collins, R. W. Portell, and S. K. Donovan. 2009. Decapod crustaceans from the Neogene of the Caribbean: diversity, distribution and prospectus. Scripta Geologica 138:55-111 [A. Hendy/A. Hendy]