张元动,俞国华,罗璋

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

摘要(Abstract)：

报道在浙江临安板桥奥陶系剖面的胡乐组中发现的较丰富的笔石动物群,包括Pterograptus elegans,Expansograptus sp.1,Tylograptus sp.,Cryptograptus?sp.,Archicli macograptus angulatus,A.caelatus,Procli-macograptus angustatus等主要属种,应属达瑞威尔阶Pterograptus elegans笔石带。这一发现表明,临安板桥一带的胡乐组时代跨度非常局限,底界比浙赣交界"三山地区"的胡乐组之底高2个笔石带,顶界对比则低2个笔石带。其下伏牯牛潭组的顶界与宜昌三峡地区相比,也低了2个笔石带,具明显的穿时现象。

关键词(KeyWords)： 生物地层;笔石;穿时;胡乐组;达瑞威尔阶;奥陶系;板桥;临安;浙江

Abstract:

Keywords:

基金项目(Foundation): 中国科学院知识创新工程方向性项目(KZCX2-YW-122);; 浙江省地质遗迹保护项目(200502);; 国家自然科学基金(No.40532009)联合资助

作者(Author): 张元动,俞国华,罗璋

DOI: 10.19839/j.cnki.dcxzz.2010.01.001

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