【摘要】 <正>辽宁省阜新盆地是我国中生代重要含煤盆地之一.有关本区地层顺序的建立及地质时代的确定,虽然早在50年前就有中外学者不断研究,但一直比较紊乱.新中国成立,露天煤矿的开采,为地层古生物的详细研究提供了大批资料.经过生产、科研、教学单位多年工作,地层层序基本建立,自下而上划分为义县组、沙海组、阜新组、孙家湾组.沈阳地质矿产研究所辽宁第一区调队在义县组与沙海组之间划分一个泥河子组,并将阜新组孙家湾煤层群之上与孙家湾组之下划分一个半拉山组.顾知微、陈丕基等将阜新组新命名为海州组.本更多还原

【Abstract】 The Lower Cretaceous flora in the Fuxin Basin, Liaoning Province is generally known as the Fuxin flora with the following characteristics.1 . Various ferns of Dicksoniaceae, such as Coniopteris arctica, , C setacea.,C. silapensis. , C. suessi and Acanihopieris gothani are predominant.2 . Ginkgophytes abundant, represented by Phoenicopsis, Ginkgo, Gin-kgoites, Baiera and Sphenobaiera,3 . Conifers well represented, with Elatocladus, Pityophyllum, Podoza-mites and Cephalotaxopsis as the main elements.1 . Cycadophytes rare, represented only by Nilssonia sinensis and Ji-IssoniopterisThe Acanihopieris "gothani fairly widespread in Northeast China is unddu-btedly one of the most characteristic species of this flora.Although several forms in the present collection, such as Ginkgo hut toni, Ginkgoites s.lbirica, Phoernicopsis, sphcnobaiera, Elatocladus manchurica and Podozamites lanceolatus,show an aspect somewhat older in age,it is surprising as a whole to find within the ferns so few species that could beconfused with Jurassic forms. Species common to the Lower Cretaceous flora of East Siberia and the Fuxin flora are Acanthopteris gothani (as Co niopteris onychioides, Birlsia onychioides) , Coniopteris setacea, C. silapensis, C. arctica. etc. ,to the Kootenay flora of Western Canada are Coniopteris silapensis (as Coniopteris brevifolia) ,Cladophlebis (Gleichenitest ) sp. [as sphenopteris (Gleichenitesf ) credo], to the comtemporaneous flora of America are Acanthopteris gothani (as Cladophlebis alata)and Coniopteris silapen-sis (as Coniopteris brevifolia). Hence it is suggested that the Fuxin flora is of Early Cretaceous age.Judging from the flora composition and characteristic the Early Cretaceous flora of China may be divided into two palaeofloristic provinces (Figure 1.). The north province represented by the Fuxin and equivalent floras belonging to the Siberian province proposed by Vakhrameev (1958, 1964, 1970) . The south province represented by Laiyang flora of Shandong, Jiande flora of Zhejiang, Bantou flora of Fujian and Duoni flora of Tibet, is in agreement with Vakhrameev’s Indo-European province or Wealden.更多还原