Also known as Kalmakpay River; Chakpaktas; Chakpaktassk; Zaysan

Where: Kazakhstan (48.0° N, 84.0° E: paleocoordinates 48.6° N, 78.1° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Chakpaktas Formation, Arshantan (56.0 - 37.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: S. G. Lucas, L. T. Holbrook, and R. J. Emry. 2001. The lophialetid ceratomorph Eoletes (Mammalia) from the Eocene of the Zaysan Basin, Kazakstan. Proceedings of the Biological Society of Washington 114(4):988-992 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 180343: authorized by Philip Mannion, entered by Philip Mannion on 13.07.2016

Creative Commons license: CC BY (attribution)