Locality 201 - Chagres Sandstone (Miocene of Panama)

Also known as USGS #8439

Where: Panama (8.9° N, 81.7° W: paleocoordinates 8.7° N, 80.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chagres Sandstone Formation, Messinian (7.2 - 5.3 Ma)

• Chagres Sandstone overlies and partly overlaps the Gatun Fm. Calcareous strata at the base of the formation throughout most of the outcrop area in the Canal Zone constitutes the Toro Limestone Mbr. The Chagres Sandstone is as much as 1000 ft thick. AGE: Late Miocene (late Tortonian-Messinian) according to Collins and Coates 1999); direct date is midpoint for established age range from microfossil biostratigraphy.

• bed-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, fine-grained sandstone and poorly lithified siltstone

• No specific environmental data presented.
• Massive, generally fine-grained sandstone and some siltstone.

Size class: macrofossils

Reposited in the CAS, PRI, USNM

Collection methods: quarrying,

• Collected by A.A. Olsson and G.M. Bevier (1918). Material is also held (but not specified for any specific collection) at Stanford University, Acad. Nat. Sci. Phil., Cornell 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 60695: authorized by Austin Hendy, entered by Austin Hendy on 20.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda and bivalvia.
 Pectinida - Pectinoidae
Amusium mimyum2 Woodring 1982 scallop
Argopecten nerterus2 Woodring 1982 calico scallop
 Cardiida - Chamidae
Arcinella sp.2 Schumacher 1817 jewel box
 Cardiida - Tellinidae
"Tellina (Tellinella) cf. rovala" = Tellinella rovala2
"Tellina (Tellinella) cf. rovala" = Tellinella rovala2 Olsson 1922 tellin clam
 Ficoidea - Ficidae
Ficus carbasea Guppy 1866 fig shell
Subspecies: F. carbasea carbasea
 Calyptraeoidea - Calyptraeidae
Crucibulum sp. Schumacher 1817 slipper shell
 Architectonicoidea - Architectonicidae
Architectonica kartseni1 sundial
Subspecies: A. (A.) nobilis karsteni