CASG Loc. 2653 - Gatun Locks [middle Gatun Fm] (Miocene of Panama)

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

• coordinate estimated from map

• small collection-level geographic resolution

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

• LITHOSTRATIGRAPHY: From the Gatun Formation, which unconformably overlies either volcanic basement of Caimito Formation (late Oligocene), and is unconformably overlain by the Chagres Formation. AGE: Tortonian; constrained by biostratigraphy of multiple groups (foraminifera, nannoplankton); direct date extrapolated from Sr dating (Hendy, unpublished). STRATIGRAPHIC POSITION: Probably from top of middle member (enterer's opinion).

• formation-level stratigraphic resolution

Environment/lithology: coastal; siliciclastic sediments

• No paleoenvironmental data provided, but assumed to be from shallow marine facies (enterer's opinion).
• LITHIFICATION: Unknown. LITHOLOGY: No lithologic data provided, but assumed to be siliciclastic.

Size class: macrofossils

Reposited in the CAS

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

• COLLECTOR: Unknown. REPOSITORY: California Academy of Sciences Geology (CASG).

Primary reference: A. G. Beu. 2010. Neogene Tonnoidean Gastropods of Tropical and South America; contributions to the Dominican Republic and Panama Paleontology Projects and Uplift of the Central American Isthmus. Bulletins of American Paleontology (377-378)1-550 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 136598: authorized by Austin Hendy, entered by Austin Hendy on 30.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

• NOMENCLATURE: Authoritative publication, with species-resolution identifications, and modern nomenclature. COVERAGE: Limited to taxa described in text.
Gastropoda
 Tonnoidea - Personidae
Distorsio decussata Valenciennes 1832 snail
 Tonnoidea - Bursidae
Bursa rugosa Sowerby 1835 frog shell