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

Also known as USGS 6026

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., Corenell 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 42580: authorized by Austin Hendy, entered by Austin Hendy on 02.08.2004, edited by Uta Merkel

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda. Includes corals.
Bivalvia
 Pectinida - Pectinoidae
Flabellipecten antiguensis4 Brown 1913 scallop
 Cardiida - Veneridae
"Macrocallista (Paradione) maculata" = Macrocallista maculata4
"Macrocallista (Paradione) maculata" = Macrocallista maculata4 Linnaeus 1758 venus clam
Gastropoda
 Ptenoglossa - Epitoniidae
Epitonium sp.2 Bolten 1798 wentletrap
 Architaenioglossa - Ampullinidae
 Neogastropoda - Conidae
Conus cf. sulculus3 Dall 1896 cone shell
 Stromboidea - Thersiteidae
Orthaulax cf. pugnax2 Heilprin 1887 snail
 Naticoidea - Naticidae
Sinum ? sp. Röding 1798 moon snail
 Calyptraeoidea - Calyptraeidae
"? Trochita cf. trochiformis" = Calyptraea (Trochita) trochiformis
"? Trochita cf. trochiformis" = Calyptraea (Trochita) trochiformis Gmelin 1791 slipper shell
Anthozoa
 Scleractinia - Acroporidae
Astreopora antiguensis1 Vaughan 1919 stony coral
 Scleractinia - Pocilloporidae
Stylophora imperatoris1, "Stylophora goethalsi" = Stylophora minor1
Stylophora imperatoris1 Vaughan 1919 stony coral
"Stylophora goethalsi" = Stylophora minor1 Duncan 1863 stony coral