Location 32, Rio Frijol area (Gatuncillo Formation) - Woodring (1957) (Eocene of Panama)

Also known as USGS 17163; Field #136

Where: Panama (9.2° N, 79.7° W: paleocoordinates 9.2° N, 79.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Gatuncillo Formation, Middle Eocene (48.6 - 37.2 Ma)

• STRATIGRAPHIC RELATIONSHIPS: From the Gatuncillo Fm, which is overlain by the Camito Fm, and unconformably overlies Cretaceous basement. AGE: Middle Eocene-Late Eocene; here assigned to Middle Eocene on the basis of stratigraphic position.

• bed-level stratigraphic resolution

Environment/lithology: coastal; sandstone

• Siliciclastic setting. No further paleoenvironmental information provided.
• Sandstone

Size class: macrofossils

Reposited in the USNM

Collection methods: quarrying,

• Collected by Thomson (1948) and Woodring (1949). 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 42493: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropods.
Bivalvia
 Pectinida - Pectinoidae
Spondylus olssoni2 Clark and Durham 1946 scallop
 Pectinida - Anomiidae
Anomia cf. ephippioides2 Gabb 1860 jingle
 Ostreida - Gryphaeidae
Pycnodonte (Crenostrea) achanes2 Woodring 1982 oyster
 Ostreida - Malleidae
"Exputens bostrychodes" = Nayadina (Exputens)1
"Exputens bostrychodes" = Nayadina (Exputens)1 oyster
 Ostreida - Pinnidae
Atrina sp.1 Gray 1842 oyster
 Mytilida - Mytilidae
? Modiolus sp.1 Lamarck 1801 mussel
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella sp. Lamarck 1799 turret shell