Where: Colon, Panama (9.4° N, 79.8° W: paleocoordinates 9.1° N, 78.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• STRATIGRAPHIC RELATIONS: The Gatun Fm rests unconformably on formations of different ages in different parts of the Panama Canal Basin. To the east of Colon, the Gatun Fm rests nonconformably on unamed Cretaceous volcanics. To the west of Colon, including several islands in Lake Gatun, the Gatun Fm rests with angular unconformity on the upper Oligocene Caimito Fm. AGE: Tortonian based on more recent dating (Hendy, 2012). Sr dating for nearby sections indicates an age of approximately 10.5 Ma (Hendy, unpublished data).

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, bioturbated siltstone

Size class: macrofossils

Collected in 1986; reposited in the NMB

Collection methods: bulk, sieve,

• COLLECTORS: unknown (PPP staff), 1986. REPOSITORIES: Naturhistorisches Museum Basel (NMB),

Primary reference: A. H. Cheetham and J. B. C. Jackson. 1999. Neogene cheilostome Bryozoa of tropical America: Comparison and contrast between the Central American Isthmus (Panama, Costa Rica) and the north-central Caribbean (Dominican Republic). Bulletin of the American Museum of Natural History (357)159-192 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 145580: authorized by Austin Hendy, entered by Austin Hendy on 06.06.2013

Creative Commons license: CC BY (attribution)