Where: Santa Cruz, Argentina (47.1° S, 66.7° W: paleocoordinates 48.9° S, 57.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: San Julian Formation, Late/Upper Eocene to Late/Upper Eocene (37.2 - 28.4 Ma)

• "The San Julian Formation based on molluscan relationships (Camacho, 1974) is considered to be Early to Middle Eocene, but Bertels (1979) maintains that planktonic foraminifera indicate a Late Eocene to Early Oligocene age... Unfortunately, the small invertebrate fauna from Punta Casamayor cannot resolve the age differences between Camacho and Bertels...From the stratigraphic relationships, the marine beds may be as old as Lower Eocene, but most likely are Late Eocene to Early Oligocene."

Environment/lithology: foreshore; lithified sandstone and lithified, tuffaceous siltstone

Size class: macrofossils

Collection methods: bulk,

• Unconformably overlying the terrestrial beds is a thin marine horizon of coarse to fine fossilferous sandstones. It is from this horizon that Riggs collected all of the invertebrates from Punta Casamayor.

Primary reference: W. J. Zinsmeister. 1981. Middle to Late Eocene Invertebrate Fauna from the San Julian Formation at Punta Casamayor, Santa Cruz Province, Southern Argentina. Journal of Paleontology 55(1):1083-1102 [A. Miller/D. Buick/D. Buick]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 52859: authorized by Arnold Miller, entered by Devin Buick on 24.08.2005

Creative Commons license: CC BY (attribution)