Also known as USGS 5908
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: marine; poorly lithified, shelly/skeletal marl and coarse-grained sandstone
Size classes: macrofossils, microfossils
Collected by MacDonald & Vaughan in 1911; reposited in the USNM
Collection methods: surface (in situ),
• COLLECTORS: MacDonald and Vaughan (1911). REPOSITORY: USNM.
Primary reference: W. P. Woodring. 1982. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae). United States Geological Survey Professional Paper 306(F) [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 92985: authorized by Austin Hendy, entered by Austin Hendy on 20.12.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
Clypeaster oxybaphon Jackson 1922 sand dollar | |
Bivalvia | |
Aequipecten sp. Fischer 1886 scallop |