East China's Zhejiang Province was a "Jurassic Park"with a wide variety of dinosaurs during theCretaceous period, according to findings of a six-year survey.
A total 82 dinosaur fossil sites, with at least sixdinosaur species and 25 types of fossil dinosaureggs, were confirmed during the survey by a jointteam of experts from the Zhejiang Institute ofHydrogeology and Engineering Geology and Zhejiang Museum of Natural History, between 2006and 2013.
The research recently won a second-class award from the Ministry of Land and Resources.Scientists identified eight new species among the fossils. The survey covered an area of11,000 square kilometers in Zhejiang.
Scientists have used various research techniques ranging from geology, paleobiology tochronostratigraphy, combined with site inspections and excavations in their study, making it themost comprehensive research on dinosaur fossils in the province to date.
"It has been proved that a large quantity of dinosaurs lived in Zhejiang during the Cretaceousperiod, about 65 million to 145 million years ago," said Jin Xingsheng, deputy curator ofZhejiang Museum of Natural History. "Compare with other southeastern provinces, Zhejiang hasthe largest amount of dinosaur fossils."
Their discoveries also give evidence to the general thought that a comet or asteroid impactcaused the mass extinction of dinosaurs.
Scientists found that sedimentary rocks, where most dinosaur fossils were unearthed, weresanwiched between two layers of volcanic rocks, indicating vegetation was lush and suitablefor dinosaurs in the early and middle Cretaceous period.
The evidence showed a catastrophe in the late Cretaceous period might have ended the ageof prehistoric creatures.
Scientists believed the hit of an asteroid was the most likely reason as it can result in a series ofsudden climate changes such as volcanic eruptions, crustal faults and generate radioactivesubstances that cause the dinosaurs to die out.