NMB Locality 16913 - Rio Mao (Miocene of Dominican Republic)

Where: Dominican Republic (19.5° N, 71.1° W: paleocoordinates 19.4° N, 70.3° W)

• coordinate based on nearby landmark

When: Sandstone Member (Cercado Formation), Late/Upper Miocene (11.6 - 5.3 Ma)

• 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).

Environment/lithology: shoreface; massive, shelly/skeletal, silty sandstone

• 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).
• 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.

Size class: macrofossils

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 228637: authorized by Joanna Wolfe, entered by Arthur Lynch on 18.12.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Malacostraca
 Decapoda - Portunidae
Scylla costata
Scylla costata Rathbun 1919 swimming crab