NMB Locality 16913 - Rio Mao: Late/Upper Miocene, Dominican Republic

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Malacostraca - Decapoda - Portunidae
Scylla costata Rathbun 1919
see common names

Geography
Country:Dominican Republic
Coordinates: 19.5° North, 71.1° West (view map)
Paleocoordinates:19.4° North, 70.3° West
Basis of coordinate:based on nearby landmark
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Miocene
Age range of interval:11.63000 - 5.33300 m.y. ago
Stratigraphy
Geological group:Yaque Formation:Cercado Member:Sandstone
Stratigraphy comments: Overlying Formation: Gurabo Formation. Underlying Formation: Unconformably overlies the Baitoa Formation. Thickness: It is unclear what the thickness is on the Rio Mao. (Saunders et al., 1986; McNeill et al., 2012; Lutz et al., 2008).
Lithology and environment
Primary lithology:massive,shelly/skeletal silty sandstone
Lithology description: Saunders et al., 1986, describes this locality as "silts with thin layers full of mollusks." It is in Maury's Bluff 3 on Rio Mao, which he describes as "having cross-bedding that is prominent in some horizons where it is picked out by lines of pink shells and Amphistegina and molluscan debris. The sands are relatively massive, and bedding is obvious from a distance being accentuated by wisps, lines and lenses of shells and by secondary concretions." Since this Bluff has been connected to the Cercado Formation by Waller 2011, Sandstone will be selected based on previous lithologies for the Cercado Formation in other river areas.
Environment:shoreface
Geology comments: The relative abundance of Argopecten eccentricus in Bluffs 2 and 3 represents a shallow marine environment in clear, normal marine waters with sea grasses. There are also silts and silty sands with shell lenses that seem to be very shallow water. (Saunders et al., 1986; Waller et al., 2011).
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:228637
Authorizer:J. Wolfe Enterer:A. Lynch
Created:2022-12-18 21:12:15 Last modified:2022-12-18 21:12:15
Access level:the public Released:2022-12-18 21:12:15
Creative Commons license:CC BY
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]