Location 12a, Madden Basin [Gatuncillo Formation] (Eocene of Panama)

Also known as USGS 25712

Where: Panama (9.2° N, 79.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Gatuncillo Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• STRATIGRAPHIC RELATIONSHIPS: In Madden basin, the Gatuncillo Formation is overlain by Caimato Formation and overlies Cretaceous basement. AGE: Middle-Late Eocene; here assigned to Late Eocene. STRATIGRAPHIC POSITION: From limestone facies (upper part of Gatuncillo Fm - A. Hendy, pers. comm., 2009).

• bed-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal limestone

• Carbonate facies, including algal and coral-rich limestones. No further paleoenvironmental data.
• LITHOLOGY: Algal or algal-foraminiferal limestones dominate the upper part of the formation. Other facies include echinoid bearing limestones, soft and coralliferous limestones. LITHIFICATION: Lithified, on the basis of figured specimens and outcrop observations.

Size class: macrofossils

Reposited in the USNM

Collection methods: surface (in situ),

• COLLECTOR: L. Jolly, 1974. REPOSITORY: USNM.

Primary reference: W. P. Woodring. 1982. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae). United States Geological Survey Professional Paper 306(F) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92978: authorized by Austin Hendy, entered by Austin Hendy on 20.12.2009

Creative Commons license: CC0 (CC0)

Taxonomic list

• COVERAGE: Exhaustive for gastropods and bivalves. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications.
Show authors, comments, and common names
Gastropoda
 Neritoidea - Neritidae
Velates perversus
Velates perversus Gmelin 1791 snail