Location 57a, Gatun Lake area (Caimito Formation) - Woodring (1957) (Oligocene of Panama)

Also known as USGS 5091

Where: Panama (9.2° N, 79.8° W: paleocoordinates 7.7° N, 77.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Middle Member (Caimito Formation), Late/Upper Oligocene (28.4 - 23.0 Ma)

• From middle member. Three members of the Caimito Formation are recognized in the Gatun Lake area: lower, middle, and upper. The lower member is predominantly conglomerate and tuffaceous sandstone; the middle member consists of tuffaceous sandstone; the upper member comprises tuff and tuffaceous siltstone. The thickness of the Caimito Formation in the Gatun Lake area is around 300 m or more. Larger foraminifera support a late Oligocene age; corals favor a late Oligocene age, although early Miocene is unlikely; molluscs also confirm an Oligocene age.

• bed-level stratigraphic resolution

Environment/lithology: poorly lithified, coarse-grained, shelly/skeletal, sandy marl

• No paleoenvironmentald data reported.
• Foraminiferal coarse sandy marl

Size class: macrofossils

Reposited in the USNM

Collection methods: quarrying,

• Collected by MacDonald and Vaughan (1911). Material is also held (but not specified for any specific collection) at Stanford University, Acad. Nat. Sci. Phil., Cornell 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 42578: authorized by Austin Hendy, entered by Austin Hendy on 02.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda. Includes corals.
Gastropoda
 Neotaenioglossa - Calyptraeidae
"Trochita cf. trochiformis" = Calyptraea (Trochita) trochiformis
"Trochita cf. trochiformis" = Calyptraea (Trochita) trochiformis Gmelin 1791 slipper shell
 Architaenioglossa - Ampullinidae
 Neogastropoda - Olividae
Olividae indet.1 Latreille 1825 olive snail
Bivalvia
 Pectinida - Pectinoidae
"Flabellipecten gatunensis" = Leopecten gatunensis2
"Flabellipecten gatunensis" = Leopecten gatunensis2 Toula 1909 scallop
Subspecies: Flabellipecten gatunensis protistus
 Pholadida - Teredinidae
Kuphus "incrassatus"2 Gabb 1873 clam
 Cardiida - Veneridae
Chione sp.2 von Mühlfield 1811 venus clam
 Cardiida - Ungulinidae