唐鹏,黄冰,王成源,徐洪河,王怿

• 1:现代古生物学和地层学国家重点实验室
• 2:中国科学院南京地质古生物研究所

摘要(Abstract)：

四川广元地区志留纪晚期地层曾被划分为金台观组、车家坝组和中间梁组,后被厘定合并为一个组,即车家坝组。通过对岩性组合特征和生物化石群面貌的分析,广元地区晚志留世地层在岩性、生物化石生物群面貌方面具有一致性,赞成将三组归入同一个岩石地层单元——车家坝组,代表近岸、正常浅海(平均浪基面以上)沉积(BA2—BA3)。对比分析表明,该组的牙形刺Ozarkodina crispa应鉴定为Ozarkodina snajdri。这是O.snajdri牙形刺带在中国的首次报道。依据牙形刺化石,车家坝组的时代被修订为中Ludlow世晚期—晚Ludlow世早期。该组上部发现几丁石Sphaerochitina sp.组合,可与O.snajdri牙形刺带和bohemicus tenus-kozlowskii笔石带进行对比。

关键词(KeyWords)： 车家坝组;Ludlow统;志留系;广元;四川

Abstract:

Keywords:

基金项目(Foundation): 中国科学院知识创新工程项目(No.KZCX2-YW-Q05-01);; 国家重点基础研究发展计划项目(No.2006CB806402);; 国家自然科学基金(No.40772007,J09300006,40839910);; “Geobiodiversity Database”联合资助

作者(Author): 唐鹏,黄冰,王成源,徐洪河,王怿

DOI: 10.19839/j.cnki.dcxzz.2010.03.003

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