Geological formation in China
From Wikipedia, the free encyclopedia
The Bayan Mandahu Formation (also known as Wulansuhai Formation or Wuliangsuhai Formation) is a geological unit of "redbeds" located near the village of Bayan Mandahu in Inner Mongolia, China, in the Gobi Desert. It dates from the late CretaceousPeriod. Laid down in the Campanian, it is dated somewhat uncertainly to between 75 and 71 mya (million years ago).[1]
The paleoenvironment it preserves was semi-arid and characterized by alluvial (stream-deposited) and eolian (wind-deposited) sediments. The formation is known for its vertebrate fossils, most of which are preserved in unstructured sandstone, indicating burial by wind-blown sandstorms.[2]
An articulated series of partial anterior cervical vertebrae, an anterior cervical vertebra, isolated fragmentary anterior caudal vertebrae, a partial scapula, and pedal phalanges.[5]
Cervical vertebrae, dorsal vertebrae, sacral vertebrae, caudal vertebrae, a scapulocoracoid, a sternum, much of the forelimbs, a partial pelvis, nearly complete hindlimbs, and some unidentified fragments.[6]
A nearly complete articulated skeleton, with in situ cervical dermal armour and tail-club, that lies in a natural with limb bones doubled under the body.[8]
A skull, cervical vertebrae, caudal vertebrae, a scapula, a humerus, a radius, metacarpals, manual phalanxes, sternal plate, a pubis, a femur, a tibiotarsus, metatarsals, and pedal phalanxes.[14]
A nearly complete articulated right forearm and manus, pedal phalanges, manual phalanges, caudal vertebrae, dorsal ribs, chevrons, and fragments of metatarsals III and IV.[10]
A partial skull, dorsal vertebrae, caudal vertebrae, partial scapulocoracoids, a partial sternum, a partial humerus, an incomplete manus, a nearly complete pelvic girdle, and the right hindlimb.[18]
A skull and mandible, anterior dorsal vertebrae, middle dorsal vertebrae, a scapula, a humerus, incomplete ischia, a femur, nearly complete pes, and other fragmentary bones.[19]
Godefroit, Pascal; Currie, Philip J.; Li Hong; Shang Chang Yong; Dong Zhi-ming (2008). "A new species of Velociraptor (Dinosauria: Dromaeosauridae) from the Upper Cretaceous of northern China". Journal of Vertebrate Paleontology. 28 (2): 432–438. doi:10.1671/0272-4634(2008)28[432:ANSOVD]2.0.CO;2.
Burns, Michael; Arbour, Victoria; Sissons, Robin; Currie, Philip (2011). "Juvenile specimens of Pinacosaurus grangeri Gilmore, 1933 (Ornithischia: Ankylosauria) from the Late Cretaceous of China, with comments on the specific taxonomy of Pinacosaurus". Cretaceous Research. 32 (2011): 174–186. Bibcode:2011CrRes..32..174B. doi:10.1016/j.cretres.2010.11.007.
Godefroit, Pascal; Currie, Philip J.; Li, Hong; Shang, Chang Yong; Dong, Zhi-ming (2008). "A new species of Velociraptor (Dinosauria: Dromaeosauridae) from the Upper Cretaceous of northern China". Journal of Vertebrate Paleontology. 28 (2): 432–438. doi:10.1671/0272-4634(2008)28[432:ANSOVD]2.0.CO;2.
Dong, Z.; Currie, P. J. (1996). "On the discovery of an oviraptorid skeleton on a nest of eggs at Bayan Mandahu, Inner Mongolia, People's Republic of China". Canadian Journal of Earth Sciences. 33 (4): 631−636. Bibcode:1996CaJES..33..631D. doi:10.1139/e96-046.
