Also known as USGS 1762, Field #107

Where: Panama (9.2° N, 79.5° W: paleocoordinates 6.7° N, 77.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• Marly limestone In Madden basin, the Gatuncillo Formation is overlain by Caimato Formation and overlies Cretaceous basement. The thickness of the foramtion is difficult to estimate, but not more than 300 m. Limestones are extensive. Algal or algal-foraminiferal limestones dominate the upper part of the formation. Other facies include echinoid bearing limestones, soft and coralliferous limestones. Siliciclastic facies dominate the formartion and include fine-grained and sandy strata.

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Reposited in the USNM

Collection methods: quarrying,

• Collected by Thomson (1948) and Thomson and Woodring (1949). Material is also held (but not specified for any specific collection) at Stanford University, Acad. Nat. Sci. Phil., Corenell University, PRI, U. Cal. and Cal. Acad. Sci.

Primary reference: W. P. Woodring. 1957. Geology and Paleontology of Canal Zone and adjoining parts of Panama. United States Geological Survey Professional Paper 306(A) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42489: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2004

Creative Commons license: CC BY (attribution)