山东青岛莱西地区首次发现恐龙蛋化石及其沉积环境分析

The First Discovery of Dinosaur Eggs in Laixi Area of Qingdao, Shandong Province, and Sedimentary Environmental Analysis

本文报道了首次在山东青岛莱西地区晚白垩世红土崖组发现的恐龙蛋化石,蛋化石呈圆形,其直径为11 cm,蛋壳的显微构造研究表明,它属于树枝蛋类,可能为镰刀龙类恐龙所产。沉积环境和岩石地球化学分析显示,该时期研究区主要为河道—河漫滩沉积环境,适宜的古气候条件是恐龙蛋孵化的理想地区;同时镰刀龙类蛋的发现,预示着将来在该地区很有可能发现镰刀类恐龙骨骼化石。

The first discovery of dinosaur eggs from the Late Cretaceous Hongtuya Formation of Laixi area of Qingdao in Shandong Province is reported in this paper.The shape of the egg is round with a diameter of 11 cm.According to the microstructure of the egg shell,they are assigned to the oofamily Dendroolithidae,probably belonging to therizinosauroid dinosaurs.The sedimentary environment and rock geochemistry analysis suggest that the study area was mainly dominated by the river channel and flood plain sedimentary environments,probably a favorable nesting site for dinosaurs under the optimum palaeoclimatic condition.At the meantime,the discovery of therizinosauroid eggs provides a possibility to find therizinosauroid skeletons from this area in the future.