Kaisen Quarry, Iren Dabasu (Cretaceous to of China)

Also known as AMNH quarry 140

Where: Nei Mongol, China (43.8° N, 112.4° E: paleocoordinates 43.1° N, 101.0° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Iren Dabasu Formation, Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• The Iren Dabasu Formation is Middle–Late Campanian according to Xing et al. 2012

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithology not reported

Size class: macrofossils

Collected by P. Kaisen in 1923; reposited in the AMNH

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

Primary reference: H. F. Osborn. 1922. Discovery of Cretaceous and older Tertiary strata in Mongolia. Science 56(1446):291-293 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 48932: authorized by Matthew Carrano, entered by Matthew Carrano on 04.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Avetheropoda - Ornithomimidae
"Ornithomimus asiaticus n. sp." = Archaeornithomimus asiaticus1
"Ornithomimus asiaticus n. sp." = Archaeornithomimus asiaticus1 Gilmore 1933 ornithomimid
2 or more individuals; AMNH 6569
 Neornithischia - Hadrosauridae
? Hadrosauridae indet.2 Cope 1869 hadrosaurid
AMNH 6552; "?duckbilled type"; eggs