摘要
贵州独山的猴儿山组龙洞水段是一套浅海相碳酸盐沉积,盛产底栖生物化石。通过对该段地层中所含四射珊瑚、床板珊瑚和腕足类等化石属种的详尽分析,再次证实龙洞水段的地质时代仍应属中泥盆世早期(Eife-lian)。而不是像某些根据痕迹化石或层序地层学的研究那样将它置于下泥盆统。
Dushan, located in southern Guizhou, is an important area for the study of Devonian shallow marine strata. Abundant benthic fossils （corals and brachiopods） have been found in the Middle and Upper Devonian.
The Longdongshui Formation was establi 1964. Based on rugose Member of shed by W and tabulate the Houershan ang et al. , in corals and brachiopods, the Longdongshui Member has long been regarded to be of early Middle Devonian （Eifelian） age. Although no index or zonal conodont species have ever been found so far, the Eifelian age has been adopted by most geologists.
However, Zhou Xiyun（1992） did not agree that the genera and species of Rugosa, Tabulata and Brachiopods from the Longdongshui Member are of Eifelian age. Afterwards, Wang et al. （1997） and Wu et al. （1997） also regarded the Longdongshui Member to be Lower Devonian in age on the basis of ichnofacies and sequence stratigraphy respectively.
However, Zhu＇s data on the Rugosa, Tabulata and Brachiopods in 1992 are questionable. As for trace fossils and sequence stratigraphy, the former mainl as the sed pally related reflected marine environments as well entary facies and the latter was princito sea level changes or transgressionregression cycles
The Longdongshui Member is eharacrterized by abundant rugosa, tabulata and brachiopod fossils. The studies on the Rugosa （Yu and Liao 1978）, the Tabulata （Ye and Zhou 1975; Deng 1979）, and the Brachiopoda （Hou and Xian 1975; Wang and Zhu 1979） afforded considerable evidence for the age of the member. The rugose corals Utaratuia sinensis and Sociophyllurn minor are similar to Utaratuia laevigata and Sociophyllurn glomerulaturn from the Hume Formation （Eifelian） of northwestern Canada respectively. The tabulate corals Favosites goldfussi eifelensis and Pachycanalicula barrandei from Europe are of early Middle Devonian age. Beside, the braehiopods Ath yrisina squarnosae f orrnis , Eospiri f erina lachryrnosa , Acrospiri f er fongi and Kwangsia perfecta were found not onl
出处
《古生物学报》
CAS
CSCD
北大核心
2009年第4期637-645,共9页
Acta Palaeontologica Sinica
基金
国家自然科学基金项目(No.40872007)资助
关键词
珊瑚化石
龙洞水段
艾菲尔阶
中泥盆统
猴儿山
贵州
Fossil Corals, Longdongshui Member, Eifelian, Middle Devonian, Houershan, Guizhou
