四川广元志留纪晚期车家坝组中线形植物的发现及其意义

发布时间：2018-03-31 04:07

  本文选题：生物地层　切入点：线形植物化石　出处：《地层学杂志》2017年04期

【摘要】：四川广元地区志留纪晚期车家坝组以碎屑岩沉积为主,产出牙形刺、腕足类、几丁虫、三缝孢、隐孢子、植物类表皮等化石,具有可靠地质时代证据;对该组的进一步研究,为扬子区志留纪晚期地层划分和对比研究提供了标杆。首次报道了车家坝组下部发现的线形植物化石,确定该植物代表的时代为志留纪晚期。根据扬子区多个产地的志留纪晚期线形植物和虫管遗迹化石,结合岩性变化,认为:在扬子区,野外确定志留纪晚期地层的化石识别标志有2个,即大量虫管遗迹化石和线形植物化石。
[Abstract]:The late Silurian Chejiaba formation in Guangyuan, Sichuan Province, is dominated by clastic rock deposits, producing conodonts, brachiopods, chitin worms, trisporium, cryptospores, plant epidermis and other fossils, which have reliable geological age evidences.It provides a benchmark for late Silurian stratigraphic division and correlation study in Yangzi area.The fossils of linear plants found in the lower part of the Chejiaba formation are reported for the first time, and the representative age of this plant is the late Silurian.According to the trace fossils of late Silurian linear plants and insect tubules from many places of origin in Yangzi area, combined with the lithologic changes, it is considered that there are two fossil identification markers for determining the late Silurian strata in the Yangzi area in the field.That is, a large number of fossils of insect tube remains and linear plant fossils.
【作者单位】： 现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所;北京大学地球与空间科学学院;
【基金】：国家自然科学基金委(No.41530103,41221001,41290260) 中国科学院B类先导培育项目(XDPB 05)资助
【分类号】：P534.43;Q914
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本文编号：1689060