Where: Kazakhstan (46.6° N, 56.8° E: paleocoordinates 46.9° N, 52.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Chegan Formation, Priabonian (38.0 - 33.9 Ma)

• Middle Chegan Formation. Its age was originally reported as early Oligocene, but restudy of the molluscan fauna indicates that the Chegan Formation is middle?- late Eocene (Bartonian?-Priabonian Stages; Amitrov, 1994). According to Akhmet'ev (2011), the Chegan Formation belongs to the Upper Eocene Priabonian Stage except for its basal beds in Turgai.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified siliciclastic sediments

Size class: macrofossils

Reposited in the PIN

Primary reference: W. B. Saunders, V. N. Shimansky, and O. V. Amitrov. 1996. Clarification of Nautilus praepompilius Shimansky from the Late Eocene of Kazakhstan. Journal of Paleontology 70(4):609-611 [A. McGowan/K. Strang/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 108261: authorized by Alistair McGowan, entered by Katie Strang on 27.04.2011

Creative Commons license: CC BY (attribution)