论文部分内容阅读
分析目前世界上所研究的上前寒武—下寒武统含遗迹化石地层,一般地层层序(由上而下)如下:(a)含有三叶虫,腕足类、古杯类和大量遗迹化石的岩层;(b)含有三叶虫和其他遗迹化石的岩层;(c)含有软体后生动物(Ediacara和有关动物)或简单遗迹化石的岩层;(d)含少量遗迹化石和迭层石的岩层。上述各个间隔通常分别称为下寒武统(a),“寒武系或前寒武系?”(b和c),以及前寒武系(d)。
Based on the analysis of the previous Precambrian-Lower Cambrian trace fossil strata studied in the world, the general sequence of stratigraphy (top to bottom) is as follows: (a) Contains trilobites, brachiopods, ancient cups and a large number of relics Fossilized rock formations; (b) rock formations containing trilobites and other trace fossils; (c) rock formations containing metazoa (Ediacara and related animals) or simple trace fossils; (d) rock formations containing small amounts of trace fossils and laminated rocks Rock formation. The above intervals are commonly referred to as Lower Cambrian (a), “Cambrian or Precambrian?” (B and c), and Precambrian (d), respectively.