浙江白垩纪恐龙化石

浙江白垩系朝川组、中戴组、金华组、赖家组和赤城山组等地层中，已发现了数以千计保存完好的蛋化石，而恐龙骨骼化石却很少而且大多很残破。其中，目前能鉴别的恐龙有暴龙类（tyrannosaurs）、伤齿龙类（troodontids）、盗蛋龙类（oviraptorids）、鸭嘴龙类（hadrosaurs）、慢龙类（segnosaurs）、泰坦巨龙类（titanosaurs）、甲龙类（ankylosaurs）和结节龙类（nodosaurs）等，分布在天台、永康、东阳、丽水、缙云、金华和江山等广大区域，说明当时浙江存在过种类繁多的恐龙动物群。根据化石埋藏和沉积特征，在白垩纪时期浙江有诸多气候炎热、四面环山的大小盆地，恐龙多沿湖泊、河流筑巢生息，季节性的暴雨导致山洪泛滥，淹没了恐龙巢穴，因泥沙的快速掩埋封闭，巢穴里的蛋形成化石后保存较好。而恐龙或逃离，或尸骨被洪水搬运散落，所以、迄今除了已发现的4具不完整的骨架化石外，绝大多数是零散的骨骼。

Cretaceous dinosaurs in Zhejiang of China

Thousands of well-preserved fossil eggs in nests and few fragmentary fossil skeletons of dinosaurs have been found from Cretaceous Chaochuan, Zhongdai, Jinhua, Laijia and Chichengshan formations in Tiantai, Yongkang, Dongyang, Lishui, Jinyun, Jinhua and Jiangshan et al. , Zhejiang Province. Tyrannosaurs, troodontids, oviraptorids, hadrosaurs, segnosaurs, titanosaurs, ankylosaurs and nodosaurs have been identified from these fossils, and suggested various dinosaurs occur in Zhejiang during Cretaceous Period. Based on paleogeographical, sedimentary and taphonomic characteristics, there were numbers of torridity basins surround by mountains, where various dinosaurs lived and nested near rivers and lakes. When seasonal flood came, eggs in nest were submerged and sealed up by mud and sand carried by floodwater, and ultimately becam fossils by diagenesis, while dinosaurs escaped before flood came, or their reliquiae scattered by floodwater.