NMB Locality 15878 - Rio Gurabo: Late Miocene - Early Pliocene, Dominican Republic

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Calappidae
Calappa sp. Weber 1795
Malacostraca - Decapoda - Leucosiidae
Iliacantha sp. Stimpson 1871
see common names

Geography
Country:Dominican Republic
Coordinates: 19.5° North, 71.2° West (view map)
Paleocoordinates:20.2° North, 69.2° 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
Stratigraphy comments: Overlying Formation: Mao Formation. Underlying Formation: Cercado Formation. Thickness: 423 m. (Saunders et al., 1986; McNeill et al., 2012; Lutz et al., 2008).
Lithology and environment
Primary lithology:shelly/skeletal silty sandstone
Lithology description: Saunders et al., 1986, describes this locality as a "10 cm thick, silty bed full of mollusks." The section is in the lower Gurabo Formation at Rio Gurabo. According to Saunders, it is very similar to the upper level sands of the Cercado Formation. They are laminated silty sands that are cross-bedded, and show strong bioturbation with large and small burrows filled with shells. Formainifera and mollusks may fill these burrows.
Environment:coastal indet.
Geology comments: Saunders et al., 1986, mention that, although similar to the Cercado Formation upper sands, the Foraminifera in this section signal a greater depth than the 20 meters from the Cercado Formation (probably more than 40). Evans 1986a  echoes this sentiment by saying this part of the formation was likely deposited above the storm-wave base.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:228615
Authorizer:J. Wolfe Enterer:A. Lynch
Modifier:A. Lynch
Created:2022-12-17 21:48:54 Last modified:2025-02-22 15:12:02
Access level:the public Released:2022-12-17 21:48:54
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]