共查询到20条相似文献，搜索用时 15 毫秒
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白沙县金波附近的 Spirifer subgrandis Rotai,Unispirifer extensus Tan,Fusella tornacensis (Koninck) ,Punctospirifer insculptus (Phillips) ,Marginatia huaqiaoensis Tan,Palaeochoristites sp.,Megachonetes sp.,Plicochonetes sp.,Schuchertella sp.,Pustula sp.,Sentisia sp.,Crurithyris sp.,Rhipidomella spp.等是海南岛首次发现的最丰富的杜内早期腕足动物群。据此 ,该地区含化石的南好组第四段确定为下石炭统岩关阶 ,似可与湖南马栏边组、黔南汤耙沟组等层位对比。以石燕贝类最繁盛、长身贝类数量少为特征的该动物群与华南其他地区同期腕足动物群存在诸多相同属种但又有明显差异。 相似文献
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安徽南部下石岩统—下二叠统有孔虫化石群 总被引：2，自引：0，他引：2
笔者在安徽南部贵池－东至地区上石炭统－下二叠统中首次发现丰富的有孔虫化石，经系统研究在上石炭统建立了两个组合，下二叠统建立了三个组合，并与国内相应地层有孔虫组合进行了对比。从而填补了该区晚石炭世－早二叠世有孔虫生物群的空白，丰富了生物群的内容，并讨论了林阶在该区的存在。 相似文献
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笔者在安徽南部贵池一东至地区上石炭统一下二叠统中首次发现丰富的有孔虫化石，经系统研究在上石炭统建立了两个组合，下二叠统建立了三个组合，并与国内相应地层有孔虫组合进行了对比。从而填补了该区晚石炭世一早二叠世有孔虫生物群的空白，丰富了生物群的内容，并讨论了隆林阶在该区的存在。 相似文献
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海南岛南好组剖析 总被引：9，自引：2，他引：7
南好组是海南岛目前使用最广泛的地层单位之一 ,代表该岛整个下石炭统 ,但其选层型为下志留统而非岩关阶 ,保亭南好地区并不存在下石炭统 ;其副层型原本是青天峡组的层型。据此 ,南好组应予废弃。根据新近发现的吉维特期胞石 Eisenackitina castor、Grahanichitina pilosa、L agenochitina amottensis;法门期牙形刺 Palmatolepisgracilis gracilis、P.gracilis sigmoidalis、Polygnathus germanus;以石燕贝类为主的岩关期腕足动物群 Spirifercf.subgrandis、Fusella cf.fornacensis、Palaeochoristites sp.、Chonetipustula sp.、Marginatia sp.、Rhipidomellaspp.和牙形刺 Siphonodella isosticha- S.cooperi组合 ;以及滑石板期—达拉期牙形刺 Mesogondolella clarki组合 ,岛西北部地区的南好组废弃后可划分出 :中泥盆统吉维特阶 (?) (组名待建 )、上泥盆统法门阶昌江组、下石炭统岩关阶鸡实组 (新名 )、大塘阶青天峡组下段及三棱山组等不同地层单元 相似文献
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《西北地质》2015,(3)
区内早泥盆世沉积为卓木巴斯套组,产丰富的古生物化石,以极为丰富的腕足为主要特征。通过地质路线调查与剖面测量,采集到大量的腕足、珊瑚、三叶虫、苔藓虫、角石、菊石等动物化石,其中,腕足类占90%以上。本次工作鉴定出腕足化石24属48种。根据动物化石组成及面貌将其定为"东准Spinatrypa khalfini动物群"。主要特征是腕足在动物群中的含量占绝对比例,而且石燕类、无洞贝类占绝对优势。依据化石组合类型及产出层位将其划分为下部Leptocoelia sinica组合及上部Spinatrypa khalfini组合。将北塔山地区与我国北部其他地区同时代地层中的腕足动物群进行对比发现:北塔山地区的腕足化石的产出层位与内蒙古地区东乌珠穆沁旗敖包亭浑迪组、东北地区金水组、霍龙门组、黑台组、乌努尔组大致相当;并根据个别属种在世界范围的时代意义,确定了卓木巴斯套组的时代为埃姆斯期。 相似文献
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本文简要介绍了晋西南地区上石炭统太原组(虫筳)类化石研究的初步成果,乡宁甘草山剖面所含(虫筳)类属种十分丰富,可细分为五个亚带,其分带、组合及构造特征很有特色,是华北地区研究生物地层的又一个具有代表性剖面。 相似文献
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白鱼山组主要分布于阿齐山以东石板沟、马头滩以北, 、南北大沟、库姆塔格沙垄和雅满苏等地,为一套浅海相碎屑岩-碳酸盐岩建造,化石极为丰富.由于在古生物组合上存在分歧,对白鱼山组的时代归属和下界划分有所争议.吴乃元,王明倩将它划为中石炭统(命名为沙泉子组)u;新疆地矿局第六地质大队划为下石炭统雅满苏组顶部;蔡土赐将它划为下上石炭统过渡层[1];《新疆区域地质志》划为下石炭统上部[2].笔者通过东疆地区的1∶25万区调和编图工作,对该套地层进行了较为详细的研究,尤其对科化石带的划分与我国标准剖面作了对比,将白鱼山组厘定为上石炭统… 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931. 相似文献
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正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.) 相似文献
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正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.) 相似文献
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正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.) 相似文献
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正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus., 相似文献
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正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an 相似文献
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正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of 相似文献
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正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37 相似文献
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正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.) 相似文献