广州地区晚泥盆世至早石炭世地层及植物组合

LATE DEVONIAN TO EARLY CARBONIFEROUS STRATA AND FLORAL ASSEMBLAGES OF THE GUANGZHOU AREA

广州地区晚泥盆世至早石炭世地层发育良好 ,出露地层为上泥盆统金钱岭组、沙水岗组以及下石炭统龙江组、石磴子组、测水组和梓门桥组 ,含有非常丰富的动植物化石 ,其中 ,广州市西北郊出露有陆相晚泥盆世至早石炭世地层的连续剖面 ,是研究陆相泥盆系与石炭系界线的理想剖面。含植物化石的陆相地层沙水岗组、龙江组和测水组中的植物化石可划分为 4个组合 ,自下而上为 :1) L epidodendropsis hirmeri- Sublepidodendron mirabile- H ama-tophyton verticillatum组合 ,代表沉积为沙水岗组 ,时代为晚泥盆世晚期 ; 2 ) Sublepidodendron mirabile-Rhodeopteridium cf. hsianghsiangense组合 ,代表沉积为龙江组 ,时代为早石炭世杜内期 ; 3) Cardiopteridiumspetsbergense- Triphyllopteris collombiana- Adiantites gothanii组合 ,代表沉积为测水组下段 ,时代为早石炭世维宪早期 ; 4) Archaeocalamites scrobiculatus- Cardiopteridium spetsbergense- Paripteris gigantea组合 ,代表沉积为测水组上段 。

In this paper the characteristics of the Late Devonian to the Early Carboniferous strata of the Guangzhou area are dealt with and the fossil plants from these strata are studied.According to the distribution of these fossils and their compositional characteristics,the Late Devonian to Early Carboniferous flora is roughly subdivided into four assemblages, namely: 1) late Late Devonian Lepidodendropsis hirmeri Sublepidodendron mirabile Hamatophyton verticillatum assemblage; 2) Tournaisian Sublepidodendron mirabile Rhodeopteriaium cf. hsianghsiangense assemblage; 3)Early Visean Cardiopteridium spetsbergense Triphyllopteris collombiana Adiantites gothanii assemblage; and 4)Late Visean Archaeocalamites scrobiculatus Cardiopteridium spetsbergense Paripteris gigantea assemblage, respectively representing the dispositions of Shashuigang Formation,Longjiang Formation,the lower part of Ceshui Formation and the upper part of Ceshui Formation.