- archicontinent; old land
◇古陆桥 pangaea
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古陆的英文
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- The main sedimentary facies of the upper carboniferous on the margin of the xuefeng anicient land can be divided into submarine alluvial , foreshore siliciclastic , shallow beach carbonate , carbonate platform and backshore restrict carbonate facies
摘要湖南沅陵雪峰古陆边缘上石炭统主要包括下列岩相类型：冲积扇砂砾岩相、前滨海滩砂岩相、浅滩碳酸盐相及混积岩相、潮下碳酸盐岩相及滩后局限碳酸盐岩相。 - These geomorphic units of paleogeography constitute the basic model of paleocontinent , littoral - neritic sea and carbonate plateform at that stage , and this depositional model is similar to the pattern of the east china continent and ocean , which is the result of evolution during the past long geologic age
这些古地理地貌单元构成了湖北省泥盆纪时期古陆滨浅海和碳酸盐岩台地的基本沉积模式，这种沉积模式与现今中国东海大陆、海洋格局基本一致，亦是经过了漫长地质历史时期演化，而形成现今这种格局的。 - On the basis of the types of sand stone , light and heavy mineral associations , planimetric map of sedimentary facies and directions of palaeoflow , it is considered that detrital material of terrigenous deposit of chang6 - 8 oil - beds in this area come from southwest provenance , northeast provenance , west provenance and south provenance , respectively , which are the denudation area of huating - longxian county in southwestern , yinshan ancient land in the northern , the denudation area of yantong mountain and tongxin to the west of yangjiajuzi - yinjiacheng county and qinling ancient land in the southern
根据砂岩类型、轻、重矿物组合、沉积相带平面展布及古水流方向等特征的分析，认为研究区延长组长6 ? 8油层组陆源碎屑物质来自西南、东北、西部和南部四大物源区，分别为西南华亭?陇县一带剥蚀区，北部阴山古陆，西部的杨家咀子、殷家城以西的烟筒山、同心地区剥蚀区和南部秦岭古陆。 - The geochemical examination of the sandstones and mudstones from the xikang group has led us to conclude that the debris are derived mostly from the surficial rocks and their overlying deposits on the xikang - yunnan ancient land , and tectonic settings display the transition from the passive continental margin to active continental margin and finally to archipelago
通过对西康群砂、泥岩地球化学组成特征研究，认为其物源来自康滇古陆表壳岩及其上覆的盖层沉积，大地构造属性为被动大陆边缘到活动大陆边缘再到多岛弧的转化。 - The distribution of all the genera and species ( including new taxa and new data by present research ) of the world are summarized , according to the history of continental drift and the result shows that empoascini originated in the oriental region in pangaea 145maago . zoogeographical analysis of all the taxa in china shows that most of the genera and species of empoascini are distributed in the oriental region , which is identical with the geographical distribution worldwide , i . e . most taxa distribute in the tropical and subtropical zone . phylogenetic analysis of 40 chinese genera of empoascini with one outgroupikranewa is presented in this paper
在生物地理及区系方面，总结了世界已报道及本研究新发现单元共计88属1183种在世界各大动物地理区的分布情况，结合大陆漂移学说的有关知识，认为小绿叶蝉族应起源于东洋区，起源时间在联合古陆时期(约145ma以前) ；分析了中国已报道及本文新发现该族共40属263种在中国动物地理区划的归属，结果表明，中国小绿叶蝉族的种类分布以东洋区占优势，明显多于古北区，这与世界该族昆虫大多分布于热带、亚热带的结果相一致。