华南浅海相泥盆系吉维特阶和弗拉阶四射珊瑚组合特征

中泥盆世吉维特晚期(更精确的说是在中吉维特期末)发生的生物更替事件使大量的头贝、全部的泡沫珊瑚亚目以及大多数的绳珊瑚科和内板珊瑚科惨遭灭绝。晚泥盆世弗拉期出现了许多新生分子,诸如Micto-phyllum,Wapitiphyllum,Pseudozaphrentis,Peneckiella等。根据珊瑚的不同组合特征可以鉴别出它们的地质时代。华南自上而下可划分出4个四射珊瑚组合,分别为上泥盆统弗拉阶(Frasnian):4)Disphyllum-Wapitiphyl-lum组合(牙形类gigas或rhenana带和hassi-jamieae带),3)Mictophyllum-Pseudozaphrentis组合(牙形类asymmetricus带);中泥盆统吉维特阶(Givetian):2)Endophyllum-Sunophyllum组合(牙形类varcus带的中部和下部之上段),1)Stringophyllum-Paramixogonaria组合(牙形类hemiansatus带-varcus带最下部)。

THE ASSEMBLAGE SEQUENCES AND CHARACTERISTICS OF THE DEVONIAN GIVETIAN AND FRASNIAN RUGOSE CORALS IN NEAR-SHORE FACIES FROM SOUTH CHINA

SummaryDevonian near-shore deposits are widespread in South China and rich in benthic corals. The Middle Devonian (Givetian) and Upper Devonian (Frasnian) rugose corals in South China flourished in a near-shore shallow water environment. Significant works on Devonian biostratigraphy and corals have been done in the sixties and the seventies of the previous century by Wang and Yu(1962), Wang et al.(1964, 1965, 1974, 1979), Nanjing Institute of Geology and Palaeontology, CAS (1974), Liao (1977), Liao et al. (1978, 1979), Hou (1978), Yang et al. (1979), Yu et al. (1979).