摘要:
研究的遗迹化石产自内蒙古额济纳旗南部戈壁滩古硐井下二叠统菊石滩组;产遗迹化石的地层剖面,位于酒泉以北约250km,沿酒泉至额济纳旗公路,即到达化石产地古硐井。遗迹化石系甘肃省第一区测队二分队采集,后由南京地质古生物研究所金玉玕同志转赠,甘肃区测队李志琛、李大庆等同志提供有关地层资料,作者对以上同志表示感谢! 一、含遗迹化石的地层本区附近出露的地层,在北部有长城系石英岩,南部见有华力西晚期石英闪长岩体,
Abstract:
Lower Permian trace fossils described herein were first found from Gu- dongjing in the southern part of the Ejin Banner,Inner Mongolia.Seven iden- tified ichnospecies and one unnamed form are listed below: Scalarituba missouriensis Weller Helminthoida labyrinthica （Heer） Helminthopsis hierographica Heer Cochilichnus sp. Chondrites expansus Sternberg Chondrites arbuscula Fiser-Ooster Planolites octichnus Chamberlain Unnamed form The trace fossils listed above closely resemble Ouachita （Penssylvanian- Permian） flysch trace fossils from southeastern Oklahoma （Chamberlain, 1971, 1978）. Among the trace fossils memtioned above, Pascichnia is predominant and Fodinichnia is subordinate. Cubichnia and Domichnia commonly occurring in the neritic facies are absent. So speaking roughly, the trace fossils should be- long to Nereites ichnofaces characteristic of an abyssal geosynclinal region.
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