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(一) 多年来,在两北地区发现了不少泥盆纪植物化石。虽然对其正式研究报道的还不多,但积累的资料已相当丰富。这些化石所代表的植物群面貌,有的已研究清楚,有的正在进行研究。就目前所知,西北地区泥盆纪植物群的产地主要有新疆的西准噶尔、甘肃的北祁连山和西秦岭(包括四川最北部)地区。其中西准噶尔地区所产的植物群,以内容丰富、保存完美和时代齐全(早泥盆世至晚泥盆世)为特征,开始引起有关方面的重视。西秦岭地区只见有早泥盆世和晚泥盆世植物群比较发育,北祁连山地区仅晚泥盆世植物群保存较好。此外,还
(A) Over the years, many Devonian plant fossils have been discovered in the two northern regions. Although there are not many reports of its formal research, the accumulated information is quite abundant. Some of the flora represented by these fossils have been well studied and some are being studied. As far as we know, the origin of Devonian flora in northwest China is mainly West Junggar in Xinjiang, North Qilian Mountains in Gansu and West Qinling (including the northernmost part of Sichuan). Among them, the flora produced in the West Junggar area is characterized by rich content, perfect preservation and complete times (from Early Devonian to Late Devonian) and has begun to attract the attention of relevant parties. In the West Qinling Mountains, there are relatively early Devonian and Late Devonian flora, and only the Late Devonian flora is preserved well in the North Qilian Mountains. Also, yet