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在概述了浙江西部上奥陶统于潜组的沉积学特征,并进而描述了发现的14个遗迹化石属基础上,从4个方面对Spirodesmos为代表的遗迹组合进行了环境分析:(1)14个遗迹属中仅3个属为穿相型分子,其余占遗迹总属2/3以上的遗迹化石均为典型的深水型分子,它们都是Nereites遗迹相的主要成员,因此该遗迹组合可归属于深海Nereites遗迹相中;(2)大部分遗迹化石呈复杂规则弯曲的形态,这种形态的遗迹化石是深海环境的遗迹化石标志;(3)14个遗迹属均为觅食迹和牧食迹,它们的行为习性,尤其是牧食迹主要分布于深海环境;(4)多数遗迹属的水深分布均在200m以下。由此可认为Spirodesmos遗迹组合是半深海-深海环境的产物。
On the basis of an overview of the sedimentary characteristics of the Upper Ordovician in the submarine in western Zhejiang and further description of the 14 discovered fossils, the environmental analyzes of the relic assemblages represented by Spirodesmos are carried out in four aspects: (1) Only 3 out of 14 relics belong to phase-type molecules, while the remaining relic fossils that account for more than 2/3 of the total relics are typical deep-water molecules that are all major members of the Nereites relics. Therefore, (2) Most of the trace fossils are in the form of complex and regular curves. The fossil trace of this pattern is the trace of the fossil remains in the deep sea environment. (3) The fourteen trace sites are both traceable and animal husbandry Food habits, especially their pastures, are mainly distributed in the deep-sea environment. (4) The depth distribution of most of the remains is below 200m. From this it can be concluded that the Spirodesmos relic combination is a product of the semi-deep-sea environment.