Gateway to the Paleobiology Database
Isabela Municipal Landfill (Miocene of Puerto Rico)

Where: Puerto Rico (18.5° N, 67.0° W: paleocoordinates 18.4° N, 66.0° W)

• coordinate stated in text

• local area-level geographic resolution

When: Aymamon Limestone Formation, Middle Miocene (16.0 - 11.6 Ma)

• Aymamon Limestone Formation is also known as "Taz" term coined by Monroe (1969), which is of Middle Miocene age (16.4 to 11.2 Ma, sensu Palmer and Geissman, 1999)

• bed-level stratigraphic resolution

Environment/lithology: marine; yellow chalk

• 50 to 80 m thick, very pale orange to bright yellow chalk and contains beds of large (up to 15 cm long) Ostrea haitiensis Gabb and other invertebrate macrofossils, interbedded with a much harder solution. The latter is very pale orange to white limestone, some of it is also fossiliferous (Monroe, 1969). The formation contains large lenses of slightly limonitic chalk and is quarried as fill (Monroe, 1969). Further geological descriptions and mapping of ‘Taz’ can be found in Gordon (1961), Monroe (1969, 1980), Miller et al. (1999), Rodrıguez and Richards (2000), and Lugo et al. (2001).

Size class: macrofossils

Primary reference: 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 [C. Jaramillo/C. Jaramillo/C. Jaramillo] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122029: authorized by Carlos Jaramillo, entered by Carlos Jaramillo on 15.12.2011

Creative Commons license: CC BY (attribution)