Sta. 110 - Rio Guajataca [Quebradillas Limestone] (Miocene of Puerto Rico)

Where: Puerto Rico (18.5° N, 67.0° W: paleocoordinates 18.4° N, 65.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: From the Quebradillas Limestone, which regionally overlie the Ponce chalky beds [subsequently referred to as Ponce Fm], and is laterally related to the Oak Grove Sands (Florida). AGE: Early-Middle Miocene based on macro- and microfaunal biostratigraphy in text. Here assigned to Middle Miocene based on more recent dating. STRATIGRAPHIC POSITION: From unknown position within formation.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

• ENVIRONMENT: Shallow carbonate setting.
• SPECIFIC LITHOLOGY: Limestone. LITHIFICATION: Lithified, on the basis of taphonomic data.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Reeds in 1915

Collection methods: surface (in situ),

• COLLECTOR: C. Reeds (AMNH), 1915. REPOSITORY: Not stated, but is likely to be AMNH, New York.

Primary reference: C. J. Maury. 1920. Tertiary Mollusca from Porto Rico. Scientific Survey of Porto Rico and the Virgin Islands 3(1):1-78 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80240: authorized by Austin Hendy, entered by Austin Hendy on 09.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: An authoritative publication but with quite antiquated nomenclature. Nevertheless, all taxa are identified to species and subgenus resolution.
Bivalvia
 Ostreida - Pteriidae
Pteria inornata Gabb 1873 pearl oyster
 Pectinida - Pectinoidae
Spondylus lucasi Maury 1920 scallop
 Cardiida - Tellinidae
Florimetis chipolana Dall 1900 tellin clam
 Pholadida - Teredinidae
"Teredo incrassata" = Kuphus incrassatus
"Teredo incrassata" = Kuphus incrassatus Gabb 1873 clam
Gastropoda
 Sorbeoconcha - Strombidae
Strombus cf. bifrons Sowerby 1850 conch
 Sorbeoconcha - Naticidae
"Natica (Stigmaulax) sulcata" = Stigmaulax sulcata
"Natica (Stigmaulax) sulcata" = Stigmaulax sulcata Born 1778 moon snail