Where: Omnogov Aimak, Mongolia (43.7° N, 100.9° E: paleocoordinates 40.9° N, 90.2° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Djadokhta Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• Age is not well constrained for the Djadokhta Formation (Clark et al. 2001). "Fossil vertebrate sites occur in the uppermost 65 m of a section..." see Fig. 1b, Dashzeveg et al. (1995).

•

•Dashzeveg et al. 2005: The quick stratigraphic succession of normal and reversed magnetozones suggests, but does not clearly establish, that the sediments may have been deposited during the rapid sequence of polarity changes in the late part of the Campanian between about 75 to 71 Ma.

Environment/lithology: eolian; fine-grained, coarse, red, silty sandstone and mudstone

Size classes: macrofossils, mesofossils

Collected in 1992-1996

Collection methods: surface (float), surface (in situ),

• Institute of Geology, Mongolia

Primary reference: D. Dashzeveg, M. J. Novacek, M.A. Norell, J.M. Clark, L.M. Chiappe, A. Davidson, M.C. McKenna, L. Dingus, C. Swisher and P. Altangerel. 1995. Extraordinary preservation in a new vertebrate assemblage from the Late Cretaceous of Mongolia. Nature 374:446-449 [A. Behrensmeyer/A. Behrensmeyer/R. Whatley]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37184: authorized by John Alroy, entered by Robin Whatley on 03.03.2004, edited by Matthew Carrano, Philip Mannion, Roger Benson and John Alroy

Creative Commons license: CC BY (attribution)