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近年来对位于莱阳棘鼻青岛龙发现地点(1号化石地点)以东新发现的2号化石地点进行大规模发掘,已发现5个化石富集层,赋存的化石均以鸭嘴龙科为主,一部分个体可能代表栉龙亚科的成员,而另一部分个体归于赖氏龙亚科的棘鼻青岛龙。这些鸭嘴龙化石从个体大小上分别代表成年、亚成年和幼年晚期个体。化石富集层以灰绿色和褐红色含砂砾泥岩沉积为主,具有典型的泥石流沉积特征和骨骼埋藏特征,并具有两种主要的死亡和埋藏模式,即恐龙群体活着时遭遇泥石流被吞没集群死亡后,肢体在短距离搬运中被撕裂并迅速沉积掩埋,骨骼分散但完整,同一个体的骨骼相距不远;恐龙正常或经泥石流导致其非正常死亡后,部分遗体未被掩埋,经暴露软组织腐烂,被后续发生的泥石流卷入并二次搬运,最终埋藏,表现为分散但较完整的骨骼与破碎呈砾石磨圆状的骨骼共生保存。这些富集层的化石及其埋藏特征反映了生活在河湖边的鸭嘴龙动物群,在鸭嘴龙幼年晚期刚刚加入成年鸭嘴龙动物群后,被卷入突发的洪水泥石流导致其集群死亡并快速埋藏的事件。
In recent years, a large-scale excavation has been carried out on the fossil site No. 2 newly discovered east of the discovery site of dragon and dragon in Qingdao (No.1 fossil site). Five fossiliferous fossils have been discovered, Mostly, some of the individuals may represent members of the Chironan subfamily, while others belong to the Serpentine dragon of Leishmania. These dinosaur fossils represent, individually, adult, sub-adult, and late-juvenile individuals, individually. The fossiliferous enrichment is dominated by greyish-green and maroon-rich sand-gravel-mudstone deposits, with typical characteristics of debris flow deposition and bone burial, and has two major patterns of death and burial: the dinosaur population encounters death due to debris flow swallowing After limbs were torn in the short distance handling and rapid deposition buried, the skeleton scattered but complete, not far from the same individual’s bones; dinosaurs normal or debris flow led to its abnormal death, some remains are not buried, the exposed soft tissue Rotten, was followed by debris flow involved and involved in the second move, and finally buried, manifested as scattered but more complete bone and crushed gravel round bones symbiotic preservation. These rich-layer fossils and their burial characteristics reflect the duck-bough fauna that live on rivers and lakes. After the ducks had just joined the adult duck-bough, The cluster died and quickly buried event.