Limón [Uscari Fm] (Miocene of Costa Rica)

Where: Limon, Costa Rica (10.0° N, 83.2° W: paleocoordinates 9.8° N, 82.0° W)

• coordinate stated in text

• local area-level geographic resolution

When: Uscari Formation (Limon Group), Late/Upper Miocene (11.6 - 5.3 Ma)

• LITHOSTRATIGRAPHY: From the Uscari Formation, which passes abruptly although conformably into the coarser grained strata of the overlying Rio Banano Formation. AGE: Early Miocene in Woodring (1973); Late Miocene in Collins et al. STRATIGRAPHIC POSITION: Composite list for formation.

• formation-level stratigraphic resolution

Environment/lithology: marine; green claystone

• LITHOLOGY: Friable gray claystone, rich in montmorillonite with minor limestone and calcareous sandstone and a thickness between 600 and 1500m. Contains a lower black shale and upper gray shales separated by a "Dentalium Zone". LITHIFICATION: Unknown.

Size class: macrofossils

Collection methods: COLLECTORS: Unknown. REPOSITORY: Unknown.

Primary reference: W. P. Woodring. 1973. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (additions to gastropods, scaphopods, pelecypods: Nuculidae to Malleidae). United States Geological Survey Professional Paper 306(E):453-539 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96507: authorized by Austin Hendy, entered by Austin Hendy on 10.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to taxa miscellaneously mentioned in text. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
Scaphopoda
 Dentaliida - Dentaliidae
"Dentalium (Fissidentalium) uscarianum" = Fissidentalium uscarianum
"Dentalium (Fissidentalium) uscarianum" = Fissidentalium uscarianum Olsson 1922 tusk shell
Gastropoda
 Opisthobranchia - Retusidae