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- CLASSIFICATION OF CHRONOSTRATIGRAPHIC AND THE BIOTA FROM THE END OF DEVONIAN PERIOD TO EARLY CARBONIFEROUS EPOCH OF NORTHERN GUANGXI 桂北泥盆纪末至早石炭世生物群及年代地层划分
- COMPARISON BETWEEN THE TWO DIFFERENT TYPES OF PALEOGEOGRAPHY OF SIMEN COAL SERIES IN THE EARLY CARBONIFEROUS EPOCH IN NORTH GUANGXI-SOUTH GUIZHOU 黔南桂北早石炭世寺门煤系两种不同古地理类型的比较
- Early Carboniferous epoch 早石炭世
- subrhombicum,etc. On the basis of the floral composition,the geological age of the Yangshan Formation flora belonged to the late Early Carboniferous epoch,corresponding approximately to late Visean to early Namurian A. 根据植物群的总体组成,杨山组植物群的地质时代属于早石炭世晚期,大致相当于维宪晚期至纳缪尔A期。
- The main coal-bearing strata in the Qinshui Basin are late Carboniferous Epoch Taiyuan Formation and Early Permin Epoch Shanxi Formation. 摘要沁水盆地晚古生代含煤地层主要为晚石炭世太原组和早二叠世山西组,可采煤层有太原组第15号煤层和山西组第3号煤层,两者均为高煤阶无烟煤。
- In Early Carboniferous, Tianshan mountains entered an intraplate evolution stage. 从石炭纪开始天山地区进入陆内演化阶段。
- Recently some Brachiopoda, coral, gastropoda, phytolite is identified by Nanjing Institute of Geology and Palaeontology China Academy of Sciences.The age belongs to Late Carboniferous epoch. 在该地层中发现了一些腕足类、珊瑚、腹足类、植物化石,经中国科学院南京地质古生物研究所鉴定,时代属晚石炭世晚期。
- The two early Carboniferous fragments are composed of Basalt and ash-black, fuchsia radiolaria silicalite, siliceous mudstone, tuff. 早石炭世两个断片由玄武岩和灰白色、紫红色放射虫硅质岩、硅质泥岩、凝灰岩组成。
- The flora reached its full flourish in the early Early Carboniferous and became extinct at the end of the Early Carboniferous. 拟鳞木植物群逐渐从泥盆纪植物群分离出来,繁盛于早石炭世早期,绝灭于早石炭世末期。
- The individual systems tracts of each sequence are discussed in detail,and sequence stratigraphic framework of Devonian to Early Carboniferous is constructed for the study area. 详细分析了每个层序各体系域的特征并建立了层序地层格架。
- Their formation time was not later than Early Carboniferous (C 1), and the emplacement took place before the formation of Late Triassic Yiwanshui Formation (T 3 y ). 其形成时代不晚于早石炭世(C1),侵位在晚三叠世一碗水组(T3y)之前。
- Further sea-floor spreading led to the occurrence of oceanic crust in Babu Basin and the Nanpanjiang Sea exceeded beyond 20 latitudes from north to south in Early Carboniferous. 进一步的海底扩张导致早石炭世时八布海盆出现洋壳,南盘江海成为南北超过20个纬度的小洋盆。
- During the end of the Devonian and the early Carboniferous, sea water was invaded again, a new transgress overlap was turned up, and a set of Donghe sandstone was widespread. 在泥盆纪末期至早石炭世早期,又出现了一次新的海水侵入,发育了分布广泛的东河砂岩。
- Therefore, the Cathaysia, Euramerica, Angara and Gondwana floras were derived from an identical Lepidodendropsis flora of the Early Carboniferous, but they were developed in different environments respectively. 因此,华夏植物群、欧美植物群、安加拉植物群和冈瓦纳植物群衍生于早石炭世全球一致性拟鳞木植物群,但它们各自发展在不同的环境中。
- The Karamaili Ocean was closed during the end of Middle Devonian.Post-collisional within-plate extension started since Early carboniferous, accompanied by rifting and formation of rift troughs. 早石炭世进入碰撞期后板内伸展阶段,形成一系列裂陷槽和裂谷,晚二叠世开始进入陆内造山阶段。
- Thus, Shaodong Formation is consistent with global transgression of basal Carboniferous as proposed by Johnson in 1982, and the Shaodong Formation may belong to the Early Carboniferous. 因此邵东组及其底部的海侵与Johnson(1982)所提出的石炭纪底部全球性海侵事件一致,据此可认为邵东组形成时代可能仍属早石炭世早期。
- It is dominated by Dictyotriletes (20. 5%), Dycospora(16. 3%),Dibolisporites(9. 7%) and Reliculataspores (8. 5%). The geological age is assumed to be Early Carboniferous Tournaisian. 组合中以Dictyotriletes(20.;5%25),Lycospora(16
- During the amalgamation, the western and northern parts joined together earlierly, and formed the continent by the uplift in the early Hercynian orogeny in the late Early Carboniferous. 其中西、北两区拼合较早 ,早石炭世末的早海西运动时抬升成陆 ;
- Volcanicity was violent during the Early Carboniferous in Santanghu region.The volcanic rocks consist of basalts,andesites and dacite liparite,with andesites playing the main part. 三塘湖地区早石炭世火山活动强烈,发育以安山岩类为主的玄武岩、安山岩、英安流纹岩的岩石组合。
- The Fuwan superlarge silver deposit is hosted in the Early Carboniferous limestones along a contact fault zone between the limestone and the overlying Changkeng Au-hosting siliceous rocks. 富湾超大型银矿床主要为脉状,产于下石炭统灰岩与长坑赋金硅质岩接触带及其下的破碎带中。