Location 42g, Gatun Lake area (Bohio Formation) - Woodring (1957) (Oligocene of Panama)

Also known as USGS 18832; field #203

Where: Panama (9.2° N, 79.9° W: paleocoordinates 7.7° N, 77.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bohio Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)

• The Bohio Formation is characterized by the presence of poorly sorted debris, mostly basaltic: very coarse debris in the form of boulders and cobbles, and finer debris formings beds of sandstone, and the matrix of conglomerate. The facies are non-mrine, but marine fossils are found in thin units in the upper part of the formation, in algal limestone and in both poorly sorted and fairly well sorted subgraywacke. The Bohio Formation overlies the Gatuncillo Formation conformably in most areas, although may lap onto the Gauncillo Formation or basement. The thickness of the formation is about 75 metres to as much as 450 metres. Smaller foraminifera from the basal part of the formation yielded a early Oligocene age. The upper part of the formation, from which the collections are derived yields larger foraminifera of late Oligocene age.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified wackestone

• No paleoenvironmentald data reported, but given that these collections originate from marine tongues/wedges, they are likely to be shallow water.
• Listed as "poorly sorted subgraywacke". Typically, algal limestone and in both poorly sorted and fairly well sorted subgraywacke.

Size class: macrofossils

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 42556: authorized by Austin Hendy, entered by Austin Hendy on 02.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda.
Gastropoda
 Neotaenioglossa - Calyptraeidae
? Crepidula sp. Lamarck 1799 slipper shell
 Cerithioidea - Turritellidae
Turritella listrota Woodring 1959 turret shell
Woodring (1959) lists this as T. listrotum; Woodring (1957) identified it as T. venezuelana
 Architaenioglossa - Ampullinidae
 Sorbeoconcha - Campanilidae
"Cerithium (Thericium) mimeticum" = Thericium1
"Cerithium (Thericium) mimeticum" = Thericium1 snail
 Neogastropoda - Olividae
Olividae indet.2 Latreille 1825 olive snail
 Sorbeoconcha - Ficidae
Gonysycon epomis1 Woodring 1959 fig shell
 Sorbeoconcha - Naticidae
Polinices ? sp., "Natica (Naticarius) ? sp." = Naticarius
Polinices ? sp. Monfort 1810 moon snail
"Natica (Naticarius) ? sp." = Naticarius Dumeril 1806 moon snail
 Neritoidea - Neritidae
Neritina sp. Lamarck 1816 snail
Bivalvia
 Lucinida - Lucinidae
Divaricella sp.4 Martens 1880 clam
 Pholadida - Corbulidae
Caryocorbula platys4 Woodring 1982 clam
 Cardiida - Veneridae
Chione (Chionopsis) posorjensis4 Olsson 1931 venus clam
 Cardiida - Ungulinidae
 Cardiida - Sphaeriidae
Pisidium atopum4 Woodring 1982 pea clam
 Cardiida - Cardiidae
 Cardiida - Tellinidae
Tellina sp.4 Linnaeus 1758 tellin clam
 Nuculanida - Nuculanidae
Adrana stena3 Woodring 1973 pointed nut clam