由恐龙化石论晚白垩世事件沉积  

The Late Cretaceous Event Sedimentation From the Viewpoint of Dinosaur Fossils

作　　者：张玉宾[1] 

机构地区：[1]胜利石油管理局地质科学研究院

出　　处：《沉积学报》1998年第2期124-128,共5页Acta Sedimentologica Sinica

摘　　要：本文根据晚白垩世恐龙化石的分布结合地层学特征，初步提出了这套含有恐龙化石的晚白垩世地层属于事件沉积的观点，并认为导致这次事件沉积的原因可能是由天体撞击地球产生的强海啸形成。The phenomenon that dinosaur fossils can be preserved very well shows that dinosaurs were rapidly buried and preserved after or before their death.The strange phenomenon that a number of dinosaur fossils were unearthed in complete body frames or throngs in the Upper Cretaceceous clastics nearly around the globe indicates that this set of clastics which buried dinosaurs should belong to a kind of 'event sedimentation'.On the other hand,the formation of the late Upper Cretaceous have such features as:① Together with the Eogene above,a complete Ⅱ class sedimentary cycle was formed. Among them there was a conformable contact,and the classfication limit was determined by the distinguishing line of dinosaurs or by the appearance line of mammalia.The micropalaeobiologics show the mixing feature of Mesozoic Cenozoic molecules.②This set of strata overlapped on the earier layers in widespread way or in capped way;and it is of large thickness,similar features and easy correlation.③There is an unconfomity at the bottom of the strata which can be correlated worldwide.④The geologic time of forming the strata is very short .⑤There are abnormal transgressive feature.The comprehensive analysis shows that this kind of sedimentary strata can be formed only under widespread way or capped way catastrophic flood conditions.This set of sediments are called 'event sedimentation' relation to the normal sedimentation.The catastrophic flood of forming the event sedimentation may be the catastrophic seaquake worldwide,and it is caused by the planet collision.In order to explain the abnormal phenomenon that the biological distinguishing line is underlying the argillic horizon,the clastics concluding dinosaur fossils and iyidium rich argillic horizon are considered as the different part of 'event sedimentation'in this paper.A lot of transporting matter carried by the catastrophic seaquake worldwide deposited repidly in very short time ,and some organism such as dinosaurs were preserved completely,then come the sedmentation of the

关 键 词：生物绝灭 恐龙化石 事件沉积 天体碰撞 晚白垩世 

分 类 号：P534.53[天文地球—古生物学与地层学] Q911.5[天文地球—地质学]