遗迹化石——复理石中重要的示底构造  

Trace fossils:the importantgeopetal structure in flysch

作　　者：方国庆[1,2] 刘德良[3] 冯江 

机构地区：[1]中国科学院兰州地质研究所 [2]中国科学技术大学地球与空间科学系,合肥230026 [3]中国科学技术大学地球与空间科学系

出　　处：《西北地质科学》2000年第2期80-84,共5页Northwest Geoscience

摘　　要：复理石相中丰富的原生生物沉积构造——遗迹化石是该地层的良好示底构造。 1典型的遗迹化石如 Skolithos,Granularia本身是示底的极好生物成因构造 ;2浊流事件前的 Nereites相遗迹化石占复理相中遗迹化石总量的大多数 ,主要保存于浊积砂岩底面且主要为下凸痕形成雕画迹 ,指示岩层底面 ;3泥岩层面遗迹化石以凹状、填平补齐状为主 ,内部纹饰较发育 ,指示岩层顶面。加强遗迹化石示底标志的研究应是今后值得重视的研究内容。Among flysch facies,there are many primary biogenic structures- trace fossils, which are good geopetal structures of the strata. 1 Typical trace fossils,like Skolithos, Granularia,are excellent biogenic geopetal structures;2 A majority of trace fossils among flysch facies belong to Nerites facies which formed before turbidity current event.These fossils are mainly kept at the base of turbidity sandstone with convex trace,that can indicate the base of the strata;3Trace fossils in mud surface are mainly concave or filled and levelled up with well- developed lamination inside,which could show the top of the strata.

关 键 词：示底构造 遗迹化石 复理石 浊积岩 原生生物沉积 

分 类 号：Q911.28[天文地球—古生物学与地层学]