Also known as USGS 18840a; field #210a
Where: Panama (9.2° N, 79.9° 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: coastal; poorly lithified, calcareous sandstone
Size classes: macrofossils, microfossils
Reposited in the USNM
Collection methods: quarrying,
• Collected by Woodring (1954). 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 42569: authorized by Austin Hendy, entered by Austin Hendy on 02.08.2004
Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)