胶莱盆地中部恐龙化石的新发现及埋藏环境研究

New Discoveries of Dinosaur Fossils and Study on Burial Environment in the Middle Section of Jiaolai Basin

摘要:

胶莱盆地内恐龙化石资源丰富，以往发现地集中分布于莱阳、诸城两地。近年来，在青岛地区新发现恐龙骨骼、恐龙蛋化石埋藏产地，有胶州安家沟恐龙（蛋）化石产地、莱西大高岚恐龙蛋化石产地、莱西涧沟恐龙蛋化石产地及即墨段泊岚—灵山恐龙化石产地。恐龙化石种类有真鸟脚类、兽脚类、鹦鹉嘴龙及鸭嘴龙类；恐龙蛋化石种类有树枝状恐龙蛋、棱形蛋、圆形蛋、椭圆形蛋及长形蛋等。该地区恐龙化石以原地埋藏为主，埋藏环境为河漫滩相及滨浅湖相，化石层常伴生有密集的虫迹、腹足类、植物类、介形类等生物化石，适合的沉积环境和丰富的食物来源是恐龙选择这些地区繁衍的重要原因；火山活动是导致恐龙聚集、死亡、埋藏的重要因素，而周期性的沉积环境变化、大规模的山体滑坡、洪水事件是化石埋藏的直接原因。

Abstract:

Jiaolai basin is rich in dinosaur fossil resources. Previous discoveries are concentrated in Laiyang city and Zhucheng city. In recent years, new dinosaur skeleton and dinosaur egg fossils have been found in Qingdao area, including Anjiagou dinosaur (egg) fossil site in Jiaozhou, Dagaolan and Jiangou dinosaur egg fossil sites in Laixi, and DuanbolanLingshan dinosaur fossil site in Jimo. The dinosaur fossils found in this area include true ornithopods, theropods, parrotbeaked dinosaurs, and duckbilled dinosaurs. The types of dinosaur egg fossils include branched dinosaur eggs, angular eggs, round eggs, oval eggs and elongated eggs. The dinosaur fossils in this area are mainly preserved in situ, with the burial environment being river floodplain and shallow lake facies. The fossil layers are often accompanied by abundant trace fossils, gastropods, plant fossils and bivalve fossils. The suitable depositional environment and abundant food sources are important factors for dinosaurs to choose these areas for reproduction. Volcanic activity is an important factor leading to the aggregation, death, and burial of dinosaurs, while periodic changes in depositional environments, large scale landslides, and flood events are the direct causes of fossil burial.