Aymamón Limestone

The Aymamón Limestone is a geologic formation in Puerto Rico. It preserves fossils dating back to the Middle to Late Miocene period.^[1]

Aymamón Limestone
Stratigraphic range: Mid-to-Late Miocene ~16.0–5.3 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Lithology
Primary	Limestone
Other	Chalk
Location
Coordinates	18.5°N 67.0°W / 18.5; -67.0
Approximate paleocoordinates	18.4°N 66.0°W / 18.4; -66.0
Region	Caribbean
Country	Puerto Rico
Aymamón Limestone (Puerto Rico)

Fossil content

Various fossils have been found in the Aymamón Limestone:^[2]

Sharks

• Megalodon^[3]

Bivalves

• Acar domingensis
• Arca imbricata
• Mimachlamys canalis

Gastropods

• Bulla umbilicata
• Chicoreus (Triplex) cornurectus
• Hindsiclava consors
• Orthaulax aguadillensis
• Orthaulax portoricoensis
• Vokesimurex messorius

Corals

• Agaricia sp.
• Favia sp.
• Goniopora sp.
• Meandrina (Placocyathus) sp.
• Montastraea sp.
• Porites sp.
• Siderastrea sp.
• Solenastrea sp.
• Stephanocoenia sp.
• Stylophora sp.

See also

• List of fossiliferous stratigraphic units in Puerto Rico

References

1. Aymamón Limestone at Fossilworks.org
2. Rio Guajataca Section at Fossilworks.org
3. Isabela Municipal Landfill at Fossilworks.org

Further reading

• E. N. Edinger and M. J. Risk. 1994. Oligocene-Miocene extinction and geographic restriction od Caribbean corals: Roles of turbidity, temperature, and nutrients. Palaios 9:576-598
• A. M. Nieves Rivera, A. C. Ruiz Yantin, and M. D. Gottfried. 2003. New Record of the Lamnid Shark Carcharodon megalodon from the Middle Miocene of Puerto Rico. Caribbean Journal of Science 39(2):223-227
• H. E. Vokes and E. H. Vokes. 1968. Variation in the genus Orthaulax (Mollusca: Gastropoda). Tulane Studies in Geology and Paleontology 6(2):71-84