广西横县六景早泥盆世遗迹化石及其古生态学意义

EARLY DEVONIAN TRACE FOSSILS FROM LIUJING, HENGXIAN,GUANGXI,AND THEIR PALEOECOLOGICAL SIGNIFICANCE

摘要: 本文研究的遗迹化石系作者1980年,同王治平及研究生胡昌铭、孙特,1981年同王成文在广西横县六景车站以北下泥盆统连花山组至那高岭组下部所采集。该段地层以碎屑岩为主,主要为砾岩、砂岩、粉砂岩和泥质岩,顶部偶夹泥质灰岩透镜体。那高岭组之下的莲花山组以往所知保存的实体化石比较贫乏,其中一些层位产古老的鱼类化石(无颌类及

Abstract: The Lower Devonian clastic sediments （Lianhuashan Fm and Nakaoling Fm） with abundant trace fossils occur at the Liujing Railway Station, Hengxian, south-eastern Guangxi. The middle part of Lianhuashan Fm is dominated by sandstone and siltstone with abundant Skolithos tubes probably a tidal flat environment. Cruziana liujingensis, Lumbricaria kwangsiensis, Chondrites sp., Palaeophycus curvatus and rarly Zoophycos sp. characterize the neritic fine sandstone and siltstone of upper part of Lianhuashan Fm. It is probably subtidal environment. Chondrites sp., Bifungites sp. and Planolites occur in shales and siltstones of basal part of Nakaoling Fm, which were part of the neritic zone and were followed by normal marine deposition of Nakaoling and Yujiang Fins. The trace fossils described herein was first found in China. They contian 8 ichnogenera and 9 ichnospecies.