摘要
1984年以来,笔者等在湖北省新洲县阳逻镇一带多处发现硅化木化石二十余件,经签定系我国首次发现的晚第三纪被子植物大戟科秋枫属(Bischofia jaranica BL)、豆科(Leguminos ae)和樟科(Lauraceae)等,并对产出化石的第四纪早更新世阳逻组地层进行孢粉、古地磁等分析测定。这些硅化木的发现和孢粉组合特征,为恢复该区当时的古环境提供了可靠依据。一、产硅化木的沉积物及地貌特征硅化木产地处在大别山南麓与江汉盆地东部边缘的接壤地带,位于长江武汉段北岸的滠水河和倒水河下游地区。化石多数产于半边山、施岗山等长江Ⅱ级阶地上部,个别产于香炉山的长江Ⅲ级阶地,
At the eastern edge of the J iang nan Basin, the Neogene angiosperm siliceous wood fossils of Bischofia javanica. BI, Leguminosae and Lau- aceao are discovered. It reflects that this regionbelongs to humid-hot tropi cs-subtropic enviro-nment. The sedimentary facies and spore-pollen assemblages from Yangluo Formation (Earlypleistocene Epoch) show that the environment ofEarly pleistocene Epoch changed into arid-cool frigid temper zone chmatical environment. The siliceous wood fossils which formed in the farly pleistocene Epoch layer sediments were moved from southern Dabie mountain valley through flood or gravel and redeposit.
出处
《地域研究与开发》
1988年第3期52-54,64,共4页
Areal Research and Development
