Where: Mongolia (45.7° N, 107.7° E: paleocoordinates 47.2° N, 109.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Late/Upper Jurassic to Late/Upper Jurassic (161.5 - 100.5 Ma)

• The geologic age of the coal-bearing layers in Khootyn Khotgor region is not yet clearly determined. It has been estimated to be as early Cretaceous to late Jurassic by Mongolian geologists.

Environment/lithology: terrestrial; sandstone and mudstone

Size class: macrofossils

Collected by HMNS-GIN in 2001

Collection methods: quarrying, surface (in situ), mechanical,

• On August 11, the party surveyed the coal-bearing beds (paper shale, mudstone, hard sandstone with various grain sizes, tuff, and coal layers) at the open cut site of the coal mine that had been visited on August 10. Rich fish fossils were discovered in the hard sandstone layers overlying the coal beds.

Primary reference: M. Watabe, K. Tsogtbaatar, N. Ichinnorov and R. Barsbold. 2004. Report on the Japan-Mongolia Joint Paleontological Expedition to the Gobi desert, 2001. Hayashibara Museum of Natural Sciences Research Bulletin 2:69-96 [R. Benson/R. Benson]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 137866: authorized by Roger Benson, entered by Roger Benson on 28.12.2012

Creative Commons license: CC BY (attribution)