A new record of hadrosaur, Jiayinosauropus johnsoni ichnogen. et ichnosp. nov., was established on the basis of a well preserved footprint. The specimen was collected from the Yong’ancun Formation of Jiayin Group of early Late Cretaceous. The site is situated on the right bank of the Heilongjiang River, near Jiayin County, Heilongjiang Province. It was a pedal impression of a hadrosaur. It appeared a broadly tridactyl foot and possessed wide and thick digital. There are webs between the digits. The first hadrosaur, Mandschurosaurus amurensis (Riabinin, 1925,1930), was reported on the south bank of Heilongjiang River. It showed that the duck-bill dinosaurs existed in the region during the Cretaceous age. This footprint, Jiayinosauropus , is the first record of hadrosaur footprint in China.
Stratigraphic sections of 4 Tertian rock units in the Ulungur River region, northern rim of the Junggur Basin, Xinjiang, are briefly described. These are the Kekemaideng, Halamagai, Suosuoquan and Ulunguhe formations. The contact relationships and biochronology of these rock units are discussed. The Kekemaideng beds are considered to be a formation of probably equivalent to middle Miocene Tunggur Fm. in age. The farm from the Halamagai Fm. is correlative to early coddle Miocene Tongxin fauna. The lower part of the Suosuoquan Fm. is younger than Tabenbulukian and probably of earliest Miocene. The Uunguhe Fm. in itS current usage is a mixture of sediments with different lithologies and different ages ranging from Cretaceous to Oligocene and should therefore be redefined.
