Also known as USGS 16970; WG155a

Where: Colon, Panama (9.3° N, 79.9° W: paleocoordinates 9.0° N, 78.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: middle Gatun Member (Gatun Formation), Tortonian (11.6 - 7.2 Ma)

• LITHOSTRATIGRAPHY: From middle part of the Gatun Formation. The Gatun Formation is sibdivided into three faunal zones (proposed by Thomson and Keen, 1946): lower, middle, and upper. AGE: Late Miocene, on the basis of microfossil biostratigraphy (see Collins and Coates, 1999), refined by enterer to Tortonian based on more recent dating (Hendy, 2012). Sr dating for nearby sections indicates an age of approximately 10.1 Ma (Hendy, unpublished data). STRATIGRAPHIC POSITION: Essentially the same stratigraphic range as WG155.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, fine-grained sandstone and poorly lithified siltstone

Size class: macrofossils

Preservation: original aragonite

Collected by Thompson in 1945; reposited in the USNM

Collection methods: surface (float), surface (in situ),

• COLLECTOR: T.F. Thompson, 1945. REPOSITORY: Stanford University (CAS).

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 145255: authorized by Austin Hendy, entered by Austin Hendy on 31.05.2013

Creative Commons license: CC BY (attribution)