12 km south of Dariv (Jurassic of Mongolia)

Where: Govi-Altay, Mongolia (46.3° N, 94.1° E: paleocoordinates 48.3° N, 95.8° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dariv Formation, Late/Upper Jurassic (161.5 - 145.0 Ma)

• dinosaur remains found at 11 stratigraphic levels

• group of beds-level stratigraphic resolution

Environment/lithology: wet floodplain; fine-grained, red mudstone and lenticular sandstone

• floodplain deposits in a seasonally wet, collisional foreland basin
• "poorly sorted red and maroon mudstones predominate, and sandstones generally are limited to lenticular beds less than 1 m thick." Mudstones are fine-grained.

Size class: macrofossils

Collected in 1995

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

• Collected by Academy of Sciences of Mongolia, Stanford University, and University of Montana

Primary reference: S. A. Graham, M. S. Hendrix, R. Barsbold, D. Badamgarav, D. Sjostrom, W. Kirschner, and J. S. McIntosh. 1997. Stratigraphic occurrence, paleoenvironment, and description of the oldest known dinosaur (Late Jurassic) from Mongolia. Palaios 12:292-297 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48822: authorized by Matthew Carrano, entered by Matthew Carrano on 30.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Dinosauria -
Dinosauria indet.
Dinosauria indet. Owen 1842 dinosaur
 Saurischia - Mamenchisauridae
Mamenchisaurus sp.
Mamenchisaurus sp. Young 1954 mamenchisaurid