摘要
本文报道云南东部中泥盆世、晚泥盆世早期孢子带研究结果。根据孢子在地层中演化规律,建立了四个孢子组合带:Calyptotporits uelatus-Rhabdosporizes langii(VL)带、Archae-ozonotriletes uariabilis-Calyptosporitrs proteus(VP)带、Geminospra lemurata-Cristatisp-orites triangulatus(LT)带和 Archaeopersaccus oualis-Lagebicula bullosum(OB)带。VL带为中泥盆世早期,VP—LT带为中泥盆世晚期,OB带为晚泥盆世早期,相当西欧的弗拉斯阶(Frasnian)。
The Devonian marine and non marine deposits were widely distributed in East Yunnan, where rich marine faunas and floras were present. The Middle and early Upper Devonian miospores of Eastern Yunnan were also abundant and usually well- preserved. The present paper provides both analysis of qualitative and quantitative composition de- velopment of Middle and early Upper Devonian spore assemblage in Eastern Yunnan, and a palynological zonation containing four successive assemblage zones: 1. Zone of Calyplosporites velatus-Rhabdosporites langii (VL); 2. Zone of Archaeozonotriletes variabilis-Calyptosporites proteus (VP); 3. Zone of Geminospora lemurata-Cristatisporites triangulatus (LT); 4. Zone of Archaeoperisaccus ovalis-Lagenicula bullosum (OB). The Middle and early Upper Devonian spore assemblages of Eastern Yunnan may be com- pared with those in South China and West Qinling. The spore zonation possesses stratigraphical dating of the Devonian megafloras of the re- gion, particularly those from the Middle and Upper Devonian. The proposed spore zonation is closely compared with that erected for the Middle and early Upper Devonian of Old Sand- stone Continent and adjacent Region. Based on palynological data, the reconstruction of Paleogeography and Paleoecology are discussed.
关键词
孢子
泥盆世
地层
Stratigraphy
Devonian
Spore
