NMB Locality 16835 - Rio Cana: Late Miocene, Dominican Republic

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Aethridae
Hepatus guraboensis Collins 2009
Malacostraca - Decapoda - Leucosiidae
Malacostraca - Decapoda - Diogenidae
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
10 m.y. bin: Cenozoic 6
Key time interval: Late Miocene
Age range of interval: 11.63 - 5.333 m.y. ago
Stratigraphy
Geological group:Yaque Formation:Gurabo
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:coarse silty,conglomeratic sandstone
Lithology description: Saunders et al., 1986, describes this locality as having "conglomeratic layers with pebbles of various sizes (max diameter 15cm); pebbles irregularly scattered in sandy to silty matrix; fossils mostly concentrated in lenses." The locality is at the bottom of the Gurabo Formation on the Rio Cana (New Gurabo/Cercado boundary updated from McNeill et al, 2012). The sands here are course and silty, and are commonly cross-bedded and channeled with common borrow and occassional thin lenses and shell debris. Conglomerate are well-rounded from the high energy environment. Although the lithology would normally be siltstone for the Gurabo Formation, this section, with their often course sands, calls for sandstone. Furthermore, this was a high-energy, shallow marine environment judging by the big rounded pebbles.
Environment:shoreface
Geology comments: The Gurabo Formation on the Rio Cana indicates a shallow reef to open shelf environment (Lutz et al., 2008). What's more, Waller (2011) says that the Pectinid assemblages on the Rio Cana point to shallower waters than on similar stratigraphic ranges on the Rio Gurabo, as well as that there is evidence for the presence of seagrasses in this interval, which would make it not more than 60 meters.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:228620
Authorizer:J. Wolfe Enterer:A. Lynch
Modifier:A. Lynch
Created:2022-12-17 22:38:58 Last modified:2025-02-22 15:12:02
Access level:the public Released:2022-12-17 22:38:58
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]