IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Stratigraphy and palaeoenvironment of the dinosaur-bearing Upper Cretaceous Iren Dabasu Formation, Inner Mongolia, People's Republic of China
Van Itterbeeck, J.; Horne, D.J.; Bultynck, P.; Vandenberghe, N. (2005). Stratigraphy and palaeoenvironment of the dinosaur-bearing Upper Cretaceous Iren Dabasu Formation, Inner Mongolia, People's Republic of China. Cretac. Res. 26(4): 699-725. dx.doi.org/10.1016/j.cretres.2005.03.004
In: Cretaceous Research. Elsevier: London; New York. ISSN 0195-6671, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 279510 [ OMA ]

Keywords
    Cretaceous, Upper; Charophyta [WoRMS]; Ostracoda [WoRMS]; Mongolia, People's Rep.; Marine
Author keywords
    Inner Mongolia; Iren Dabasu Formation; Late Cretaceous; Charophyta;Ostracoda

Authors  Top 
  • Van Itterbeeck, J.
  • Horne, D.J.
  • Bultynck, P.
  • Vandenberghe, N., more

Abstract
    New field observations and sedimentological analyses of the dinosaur-bearing Upper Cretaceous Iren Dabasu Formation in the Iren Nor region of Inner Mongolia (People's Republic of China) have led to a better understanding of its palaeoenvironment. The fluvial deposits represent a braided river that, due to the large amount of fines, does not fit the classical model for braided rivers. The study area is divided into two parts: in the northern part, sediments of the main channel belt of the ancient braided river system are exposed along a dry river valley on the northern edge of the Iren Nor salt lake, while in the southern part, comprising all other studied exposures, different facies of the ancient floodplain are represented, including minor channels, temporary ponds, and palaeosols. The difference between the northern and southern parts is also reflected in the fossil content; only the southern exposures have yielded dinosaur remains. The ancient braided river had a broad, vegetated floodplain populated by a diverse dinosaur fauna. Four species of charophytes are described and illustrated from the Iren Nor site, together with eight species of ostracods, one of which (Cypridea irennorensis sp. nov.) is new. Contrary to the vertebrate data, both groups of microfossils indicate a latest Cretaceous age (Campanian-Maastrichtian) for the Iren Dabasu Formation, and suggest a possible correlation with the Nemegt Formation, which would allow the age estimation to be refined to latest Campanian-Early Maastrichtian.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors