淮北煤田早二叠世化石植物古生态

EARH PERMIAN FOSSIL PLANT PALAEOEOECDOGY,HUAIBZICOAL-FIELD

淮北煤田早二叠世化石植物丰富，其形成于炎热多雨的热带滨海三角洲沉积体系中。下三角洲平原是该区化石植物最宜生长的地方。早二叠世该区化石植物常形成四类植物群落：森林沼泽植物群落、沿岸水生植物群落、高地植物群落、三角洲平原真蕨及种子蕨混生植物群落（早期）、树蕨－大羽羊齿类雨林植物群落（晚期）。随着时间的推移，这四类植物群落的结构及面貌发生着不断的变化；其演替显示，早二叠世晚期该区气侯更加湿热，雨林气侯更为普遍。

The fossil plants of Huaibei coalfield of Early permian are very abundant.Itformed in the littoral delta depoxitional system which、located in the blazing and rainy tropicalzone. The lower delta plain is the mosst suitable area for plnt living, Usually,there werefour plant community types. i.e. the forest swamp community,the ripaian hydophyte com-munty.the upland plant community, the mixed pland community of Filicophta and Pteri-dospermophta in delta plata plain(the earlier Early permian)and the tropical rain forestplant lonimunity of the treeferns and Gigaiitopterides(the later Early permian).as timewent on, the structures and the features of these plant community types types were con-stantly changing。 Its evolution indicates that the climate of this renion during the later periodof Early permian was more humid, scorching and widespread of the tropical rain forests thanthe earlier period of Early permian.