论文部分内容阅读
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。
Late Zhilijiaguan Formation in Guangyuan area of Sichuan Province is mainly composed of clastic sediments, producing fossils such as conodonts, brachiopods, chitin, three-stalk spores, cryptosporidium and plant epidermis with reliable geologic age evidence The further study of this group provides a benchmark for the stratigraphic division and comparative study of the Late Silurian in the Yangtze area. For the first time, the linear plant fossils found in the lower part of Chejiaba Formation were reported, and the epoch of this plant representative was identified as Late Silurian. According to the Late Silurian lineal plants and insect-tube fossils in a number of areas in the Yangtze area, in combination with the lithological changes, it is considered that there are 2 fossil identification marks in the Late Silurian strata in the Yangtze area, Fossils and linear plant fossils.