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 Sr dating for nearby sections indicates an age of approximately 10.1 Ma (Hendy, unpublished data).

• bed-level stratigraphic resolution

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

Size class: macrofossils

Preservation: original aragonite

Collected by MacDonald in 1912; reposited in the USNM

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

• COLLECTOR: D.F. MacDonald, 1912. REPOSITORY: USNM.

Primary reference: R. T. Jackson. 1917. Fossil Echini of the Panama Canal Zone and Costa Rica. Proceedings of the Unites States National Museum 53:489-501 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 145570: authorized by Austin Hendy, entered by Austin Hendy on 06.06.2013

Creative Commons license: CC BY (attribution)