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迄今在中国石炭-二叠纪地层中共发现小型单体无鳞板珊瑚动物群(也称为Cyathaxonia动物群)分属于12科40个属,广泛分布在全国各地.发育程度和组成内容依据时代分布可划分为三个阶段:(1)密西西比亚纪;(2)宾夕法尼亚亚纪-早二叠世;(3)中二叠-晚二叠世.其中第(1)和第(3)阶段小型单体无鳞板珊瑚动物群较为发育,三阶段从早到晚总体变化趋势为Antiphyllidae逐渐减少,Hapsiphyllidae逐渐增多.通过剖析云南保山地区和安徽巢湖地区的密西西比亚系的四射珊瑚产出情况的两个实例,本文试图探讨小型单体无鳞板珊瑚动物群的环境指示特性.同一地理区的小范围相邻地区同期地层出现小型单体无鳞板珊瑚动物群和具鳞板或泡沫板的大型单体和复体珊瑚动物群的相变,以及短时间跨度连续地层小型单体无鳞板珊瑚动物群与大型单体具鳞板和复体珊瑚动物群的交替出现,说明小型单体无鳞板珊瑚动物群的产出与泥质基底、混浊水体、弱光照、较深水等多种环境有关,而与冈瓦纳相或亲冈瓦纳相的冷水环境并无必然联系.
So far, it has been found in China’s Carboniferous-Permian strata that the small scale monolayer coral fauna (also called Cyathaxonia fauna) belong to 12 genera and 40 genera and are widely distributed all over the country.The degree of development and composition are based on the age distribution It can be divided into three stages: (1) Mississippiian; (2) Pennsylvanian-Early Permian; (3) Middle Permian-Late Permian. The first and the third Monolayer scales coral fauna more developed, the three stages from early to late overall trend of Antiphyllidae gradually reduced, Hapsiphyllidae gradually increased.Through the analysis of Yunnan and Chaohu Lake in Anhui Chaozhou area of coral output of coral In this paper, we attempt to explore the environmental characteristics of small scale monolayer coral fauna in the same geographical area with small single-scale plateless coral fauna and scaly or foamy Large single and complex coral fauna faunas, as well as short-span continuous formation of small single-scale plateless coral fauna and large single-scale plate and complex coral fauna alternate, indicating small single Output and non-argillaceous base slat coral fauna, water turbidity, low light, and other deep-water environments, but not with a cold water environment or affinity Gondwanic Gondwanic is not necessarily linked.