辽东、辽西下石炭统孢粉组合特征

辽东、辽西石炭系（地台型）发育，化石丰富，是研究我国北方石炭系及矿产的理想地区。华北缺失下石炭统早已成“定论”，但笔者通过植物化石研究证实东北南部存在早石炭世地层无疑，并建立了Ｓｕｂ－ｌｅｐｉｄｏｄｅｎｄｒｏｎ－Ａｃｈａｅｏｃａｌａｍｉｔｅｓ－Ｃａｒｄｉｏｐｔｅｒｉｄｉｕｍｓｐｅｔｓｂｅｒｇｅｎｓｅ组合带。与此同时，作者又在辽东、辽西石炭系下部采到了丰富的孢粉化石共３６属７５种，并归结为Ｌｙｃｏｓｐｏｒａｐｕｓｉｌｌａ－Ｃｒａｓｓｉｓｐｏｒａｋｏｓａｎｋｅｉ组合，时代为早石炭世晚期，即维宪－纳缪尔Ａ期。从而孢粉、植物大化石互为佐证，进一步肯定辽东、辽西存在早石炭世地层，进而改写了华北地质史的内容，并对古构造、古地理的研究具有重要意义。另外，孢粉层位还发现了丰富的叶肢介化石，这是我国石炭纪的第３处叶肢介产地，对叶肢介的起源、演化及利用多门类生物化石解决石炭系的内部界线划分积累了资料。

THE CHARACTERISTICS OF SPOROPOLLENASSEMBLAGE FROM LOWER CARBONIFEROUSSERIES IN EAST AND WEST LIAONING

The Carboniferous system(platform-type)developed well with abundant fossils,whichwas an ideal area for researching Carboniferous system and mineral resources in the northernChina.Before, it had been consideres that in North China Lower Carboniferous series wasabsent, but the paper hold that the studies on plant fossils proven the existence of the EarlyCarboniferous strata in the southern Northeast China,and set up an assemblage of Sub-lepidodendron-Achaeocalamites-Cardiopteridium spetsbergense. At the sametime,the authorsfound and collected plentiful sporopollen fossils of 36 genera,75 species,which were includedinto Lycospora pusilla-Crassispora kosankei assemblage of the late stage of Early Carbonifer-ous,or Visean-Namurian A.These sporopollen and plant micro-fossils verified that therewere Early Carboniferous strata in East and West Liaoning, the geology history of NorthChina should be rewriten, and these fossils were of great significance for researchingpaleostructures and paleogeography.Moreover,a number of Estheria fossils were discoveredin sporopollen stratohorizon,which was the third origin place of Carboniferous Estheria fos-sils in China, and it was important for accumulating information on studing the origin andevolution of Estheria,and on subclividing Carboniferous system according to various paleon-tologic fossils.