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Early-Mid Ordovician brachiopod diversification in South china

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Science china Earth sciences 2005年第5期48卷 662-675页

作者： ZHAN Renbin, RONG Jiayu, CHENG Jinhui & CHEN Pengfei nanjing institute of geology and palaeontology, chinese academy of sciences State Key Laboratory of Palaeobiology and Stratigraphy, nanjing 2.0008, china 1. nanjing institute of geology and palaeontology Chinese Academy of Sciences State Key Laboratory of Palaeobiology and Stratigraphy 210008 Nanjing China

Affected by paleogeographic position, paleoclimatic condition and depositional environments, the increase of the Early-Mid Ordovician brachiopod diversity of South china commenced at the beginning of the Ordovician (early Tremadoc), accelerated from the Tetra- graptus approximatus Biozone (base of Arenig), and reached its first acme in the Didymograptus eobifidus Biozone (mid early Arenig) when the number of brachiopod genera was over 7 times as great as that at the start of the Ordovician. This was the first radiation in the history of brachiopod macroevolution in South china, which occurred nearly 5 graptolitic biozones earlier than the global trend of the great Ordovician biodiversification (in the lower part of the Undulograptus austrodentatus Biozone). It is also characterized by (1) the origination or first occurrences of some major groups, such as the punctate dalmanelloids and the pseudopunctate stro- phomenoids including Plectambonitoidea (cardinal process simple or absent) and Stro- phomenoidea (cardinal process bilobed) in South china; (2) niche expansion, particularly in the first occupation of deeper water benthic regimes by the Euorthisina-Nocturnellia Association developed at Houping, Chengkou, northern Chongqing; and (3) the differentiation of brachiopod faunas under different environmental conditions. The gradual and increasing separation from Gondwana may have been one of the factors responsible for the radiation in South china.

关键词： biodiversity, evolutionary radiation, brachiopods, Early-Mid Ordovician, South china.

Criteria for defining and recognizing the various orders of sequences in outcrop sequence stratigraphy

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Science china Earth sciences 2004年第7期47卷 618-629页

作者： WANG Xunlian Faculty of Earth sciences and Mineral Resources, china University of Geosciences, Beijing 100083, china State Key Laboratory of Palaeobiology and Stratigraphy, nanjing institute of geology and palaeontology, chinese academy of sciences, nanjing 2.0008, china 1. Faculty of Earth sciences and Mineral Resources China University of Geosciences 100083 Beijing China 2. State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences 210008 Nanjing China

The regional distribution in different depositional facies belts is here regarded as an important criterion for defining and recognizing the various orders of sequences. The third-order sequence is possibly global in nature, which may be discerned in different depositional facies belts in one continental margin and can be correlated over long distances, sometimes even worldwide. Commonly, correlation of subsequence (fourth-order sequence with time interval of 0.51.5 Ma) is difficult in different facies belts, although some of them may also be worldwide in distribution. A subsequence should be able to discern and correlate within at least one facies belt. The higher-order sequences, including microsequence (fifth-order sequence) and minisequence (sixth-order sequence), are regional or local in distribution. They may reflect the longer and shorter Milankovitch cycles respectively. Sequence and subsequence are usually recognizable in different facies belts, while microsequence and minisequence may be distinguished only in shallow marine deposits, but not in slope and basin facies deposits. A brief discussion is made on the essential conditions for correct identification of sequences, useful methods of study, and problems meriting special attention in outcrop sequence stratigraphy.

关键词： outcrop sequence stratigraphy, facies belt, sequence, subsequence, microsequence, minisequence, meter-scale cyclothem, Milankovitch cycle.

Late Jurassic and Early Cretaceous Radiolarians from Zhilong,Gyangse,Tibet

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地学前缘 2009年第S1期16卷 275-276页

作者： Bo Xu,Hui Luo nanjing institute of geology and palaeontology,chinese academy of sciences,nanjing 2.0008,china.

Abundant well-preserved Late Jurassic-Early Cretaceous radiolarian fossils were extracted from 31 bedded green chert samples collected from Zhilong section,Gyangse,southern ***

关键词： Late Jurassic Early Cretaceous radiolarians Zhilong Gyangse Tibet

Whole fossil plants of Ephedra and their implications on the morphology,ecology and evolution of Ephedraceae (Gnetales)

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chinese Science Bulletin 2010年第15期55卷 1511-1519页

作者： WANG Xin 1,2 & ZHENG ShaoLin 3 1 nanjing institute of geology and palaeontology,chinese academy of sciences,nanjing 2.0008,china 2 Fairy Lake Botanical Garden,Shenzhen 518004,china 3 Shenyang institute of geology and Mineral Resources,Shenyang 110034,china nanjing institute of geology and palaeontology Chinese Academy of Sciences Nanjing 210008 China Fairy Lake Botanical Garden Shenzhen 518004 China Shenyang institute of geology and Mineral Resources Shenyang 110034 China

Although there are many reports of fossil Ephedraceae,whole plant fossil record remains *** to a lack of trust on partially preserved fossil materials,scholars working on molecular clock proposed a recent origin of Ephedra and cast doubt on the earlier origin time of *** better the understanding on this interesting group,here we report whole plants of Ephedra hongtaoi ***.(Ephedraceae,Gnetales) from the Yixian Formation (Early Cretaceous) in western Liaoning,*** whole plants of Ephedra demonstrate clearly the characters of Ephedra,including shrubby growth habit,decussate branching pattern,and terminal ovuliferous unit with micropylar *** whole-plant preservation of the fossils provides more convincing fossil evidence of Early Cretaceous Ephedra,helps to resolve the controversy over the origin time of Ephedra,and sheds light on the whole plant morphology,growth habit,ecology and evolution of Ephedraceae.

关键词：化石植物生态学麻黄形态学进化材料保存早白垩世生长习性

LATE SINIAN(TUBULAR) METAZOAN FOSSILS:CLOUDINA AND SINOTUBUL ITES FROM SOUTHERN SHAANXI

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微体古生物学报 2001年第2期 193-198页

作者： CHEN Zhe and SUN Wei guo (nanjing institute of geology and palaeontology, chinese academy of sciences, nanjing 2.0008)

Kalligrammatid Lacewings from the Upper Jurassic Daohugou Formation in Inner Mongolia, china

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Acta Geologica Sinica(English Edition) 2003年第2期77卷 141-147页

作者： ZHANG Junfengnanjing institute of geology and palaeontology, chinese academy of sciences, nanjing, Jiangsu 2.0008, E-mail: jfzhang@*** chinese Acad Sci Nanjing Inst Geol & Palaeontol Nanjing 210008 Jiangsu Peoples R China

A new species, referable to a new genus, is erected, and named the Sinokalligramma jurassicum gen. et sp. nov. It is the second finding of kalligrammatids in the Daohugou Formation. The origin and migration of the family Kalligrammatidae are discussed. The geological age and stratigraphic correlation of the Daohugou and Karabastau Formations are briefly reviewed and reassessed.

关键词： kalligrammatid lacewings new taxa age origin and migration Jurassic Inner Mongolia china

Sedimentary environment of the Dajin conglomerate in Tibet, age of foraminiferan assemblages and their tectonic significance

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Progress in Natural Science:Materials International 2005年第11期15卷 1014-1020页

作者： YAN Zhen, FANG Aimin, PAN Yusheng, LI Jiliang, LIU Xiaohan, YU Liangjun and ZHANG Binggao (Laboratory of Lithosphere Tectonic Evolution, institute of geology and Geophysics, chinese academy of sciences, Beijing 100029, china institute of Tibet Plateau Research, chinese academy of sciences, Beijing 100029, china nanjing institute of Paleontology, chinese academy of sciences, nanjing 2.0008, china) Laboratory of Lithosphere Tectonic Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China. institute of Tibet Plateau Research Chinese Academy of Sciences Beijing 100029 China. nanjing institute of Paleontology Chinese Academy of Sciences Nanjing 210008 China

The Dajin conglomerate, which is one of the most important sedimentary successions of the Xigaze forearc basin in Tibet, china, consists of deep-shallow marine tuffaceous turbidites and clastic rocks bearing Nummulites, Assilina, Alveolina and Lock-hartia . These fossils are very similar to the foraminiferan in the Jialazi and Maila conglomerates, and those in Gangba and Dingri areas. They developed in the Eocene. By analyzing the spatial variation of Eocene sedimentary environments of Tibet Plateau and the foraminiferan in the Dajin conglomerate, we found that Eocene sedimentation should take place on both sides of the Yarlung Tsangpo suture, and the late Eocene tectonic uplifting should make the forearc basin expose out of the sea level and begin to receive nonmarine deposits.

关键词： Dajin conglomerate marine deposits Eocene foraminiferan Yarlang Tsangpo sutnre.

New data regarding acritarch biostratigraphy from the Early-Middle Cambrian Kaili Formation in Chuandong,Guizhou Province,china

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Progress in Natural Science:Materials International 2009年第1期19卷 107-114页

作者： Leiming Yin a,Ruidong Yang b,Jin Peng c,Fanfan Kong a a nanjing institute of geology and palaeontology,chinese academy of sciences,nanjing 2.0008,china b College of Resource and Environment of Guizhou University,Guiyang 550003,china c Department of sciences of nanjing University,nanjing 210093,china [a]nanjing institute of geology and palaeontology Chinese Academy of Sciences Nanjing 210008 China [b]College of Resource and Environment of Guizhou University Guiyang 550003 China [c]Department of Sciences of Nanjing University Nanjing 210093 China

Previous studies had evaluated acritarchs from the Balang and Pingzhai sections of the Early-Middle Cambrian Kaili Formation in east Guizhou,*** results of these studies suggest that the acritarchs in these sections have potential biostratigraphic *** recently,34 samples collected from 83 m lower part of the Lower-Middle Cambrian Kaili Formation in the Jianshan section of Chuandong,Guizhou Province were prepared for palynological *** of these samples revealed a distinct change in the acritarch assemblages at the bed,which was approximately 46 m above the bottom of the Kaili *** findings suggest a boundary represented by an important alteration of the ecological *** addition,the position of the acritarch biostratigraphic change is somewhat higher than the boundary between Cambrian Series 2 and Series 3 based on trilobites found in the same *** indicates that the distinct change in acritarch assemblages is similar to the change in trilobite assemblages that occurs around the boundary between Cambrian Series 2 and Series ***,acritarch biostratigraphy can provide data that can be used to define the base of Cambrian Series 3 in this region,and possibly worldwide.

关键词： Acritarchs Lower-Middle Cambrian Kaili Formation Jianshan section Chuandong

Diversity,Systematic and Evolution of Fossil Osmundaceous Ferns in china

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地学前缘 2009年第S1期16卷 256-257页

作者： Ning Tian,Yongdong Wang,Zikun Jiang nanjing institute of geology and palaeontology,chinese academy of sciences,nanjing 2.0008,china.

The family Osmundaceae receives much concern of palaeobotanists for its peculiar sporangia and phylogenetic *** osmundaceous fossils have been reported in *** far,about 34 species ascribed to seven genera of Osmundace... 详细信息

关键词： Osmundaceae diversity systematic evolution ecological implication china