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全球奥陶系底界的“金钉子”问题及我国特马豆克阶(Tremadocian)的划分与对比
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汪啸风1, MALETZJörg3, 王传尚1, 阎春波1 |
On the Problem of Global Ordovician Lower Boundary “Golden Spike” and Tremadocian Subdivision and Correlation in China
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WANG Xiao-feng 1, STOUGE Svend 2, MALETZ Jörg 3, WANG Chuan-shan 1, YAN Chun-bo 1
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吉林白山江源县大阳岔小阳桥寒武系与奥陶系界线剖面 A. 白山江源大阳岔小洋桥寒武系与奥陶系界线剖面; B. 含 Anisograptus matanensis 带笔石的灰绿色薄层粉砂质页岩; C. 产最低层位浮游正笔石 R. parabola ( 含 R.praeparabola 黄绿色页岩(Bed 27)); D. 示产最低层位浮游正笔石与所建议的寒武系—奥陶系界线间的地层,铁锤处为25层(Bed 25); E. 小洋桥寒武系—奥陶系界线剖面界线上下的地层, 黄线示界线接近22层底部(Bed 22) |
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