检索结果-南通市图书馆

A Comprehensive Evaluation on the Devonian-Carboniferous Boundary Stratotype Candidate Section in Nanbiancun, Guilin, Guangxi

在线全文

学校读者我要写书评

暂无评论

Acta Geologica sinica(English Edition) 1990年第1期64卷 69-79页

作者： Yu Changmin nanjing institute of geology and palaeontology, academia sinica 2This paper is extracted from some relevant chapters of a monograph. The authors who wrote the monograph are: Yu Changmin Ruan Yiping Xu Hankui Wang Shangqi Zhu Zhaoling Mu Xinan Wang Keliang Yin Bao' an Li Zhengliang Li Yukuan Guo Shuying Yao Zhaogui He Guiying Zhang Yue'e Lu Hongjin Huang Zhicheng Zhu Sizhao Yang Jiedong Wang Yinxi Ye Sujuan and Xu Tongchun.

This paper presents a comprehensive evaluation on the Devonian-Carboniferous Boundary (DCB) sectionin Nanbiancun. Guilin. Guangxi on the basis of Palaeontological, biostratigraphical and sedimentarypetrological studies as well as microfacies analysis. REE and trace element analysis and isotopic dating. The DCB at this section conforms to the definition of this boundary and essentially measure up the criteriaand conditions for selection of the boundary stratotype. Up to 14 fossil groups are contained in the section. Thesection presents a general biostratigraphical framework with multispecies fossils zones, assemblage zones andmultiple groups of fossils and has latent preponderant conditions for magnetostratigraphic andchronostratigraphic studies. The boundary and point occur in a persistent and continuous monofacialcarbonate succession. and the section is located in a tourist city with convenient communication, where variousfacies of DCB sections are developed. allowing the correlation within a small area. So it is an ideal candidateboundary stratotype.

关键词： Guilin Guangxi A Comprehensive Evaluation on the Devonian-Carboniferous Boundary Stratotype Candidate Section in Nanbiancun

BIOGEOGRAPHIC RELATIONS OF THE JURASSIC PECTINOIDA AND OSTREOIDA (BIVALVIA) BETWEEN TANGGULA AND OTHER AREAS

在线全文

学校读者我要写书评

暂无评论

地学前缘 2000年第S1期7卷 139-141页

作者： sha jingeng (nanjing institute of geology and palaeontology, academia sinica, nanjing 210008, China)

There are abundant Bajocian—Tithonian bivalves in the main ridge of the Tanggula Mountains of northern Qinghai—Xizang Plateau, China. After figuring the common and coeval species between Tanggula and other areas (Fig. 1), and tracing the temporal and spacial historical distribution of the bivalves very capable of dispersion, some Jurassic bivalve biogeographic items, particularly the biogeographic relations, have been lit up. In the known 21 taxa of the Jurassic Pectinoida and Ostreoida from the main ridge of the Tanggula Mountains, there are 12 (57%) common and coeval species in northern Tethys, 13 (62%) common and coeval species in southern Tethys and 12 (57%) in Kachchh—southern Xizang area. It has demonstrated that there existed intermigration of bivalves between Tanggula and various parts of Tethys. Although there is no coeval species between Tanggula and western Australia, in these two areas there exist 6 (29%) close range common species of which 4 (19%) coevaity existed in western Australia and India Plate. Tanggula fauna is, therefore, still very close to that of western Australia. However, there are 15 (71%) common and 14 (67%) coevality species between the main ridge of the Tanggula Mountains and northwestern Europe, among the common species, 8 (38%) ones have lower limitation (first occurrence) in northwestern Europe but only 2 (10%) taxa are older in the main ridge of the Tanggula Mountains. It is very clear that pectinite and ostrea fauna of Tethys, particularly the main ridge of the Tanggula Mountains and Europe had very close relation and most Tanggula’s or northern Tethyan taxa migrated from northwestern Europe.

关键词： biogeographic relation Jurassic Bivalvia Tanggula of norther n Qinghai—Xizang plateau Tethys northwestern Eu rope Pacific

Preface——Jurassic of China and Environs: Stratigraphy, Basin History, and Paleoenvironment

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2009年第12期52卷 1871-1872页

作者： sha jingeng LPS, nanjing institute of geology and palaeontology, Chinese Academy of Sciences, nanjing 210008, China LPS Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

The Jurassic is a geologically very complicated period in Earth history, spanning from 200 to 145 Ma. The Pangean supercontinent and even the Gondwana-land broke up, and the violent circum Paleo-Pacific (Yanshan) or... 详细信息

关键词： Preface and Paleoenvironment Stratigraphy Jurassic of China and Environs Basin History

TWO CALLIXYLON SPECIES FROM UPPER DEVONIAN OF JUNGGAR BASIN, XINJIANG

在线全文

学校读者我要写书评

暂无评论

古生物学报 1989年第5期 575-578页

作者： Cai Chong-yang (nanjing institute of geology and palaeontology, academia sinica)

During field studies of the Devonian biostratigraphy in the summers of 1984 and 1985, some silicified woods of Callixylon were discovered for the first time by the author from the Hongguleleng Formation (Late Devonian) in the northwestern border area of the Junggar (Dzungaria) Basin, Xinjiang (Sinkiang), which have been briefly reported (Cai, 1987). Here illustrated and described are two species, from our collection, namely, Callixylon of. clevelandensis Chitaley and Callixylon newberryi (Dawson) Elkins et Wieland. DESCRIPTION OF SPECIES Callixylon cf. clevelandensis Chitaley (P1. Ⅰ, figs. 1—5; Pl. Ⅱ, figs. 1, 2)

关键词： briefly Dawson border collection illustrated 登记号 XINJIANG 弦切面 northwestern 局部放大

SOME LOWER CRETACEOUS GYMNOSPERMAE FROM ZHEJIANG WITH STUDY ON THEIR CUTICULES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

古生物学报 1989年第4期 440-446页

作者： Cao Zheng-yao (nanjing institute of geology and palaeontology, academia sinica)

The Lower Cretaceous extensively distributed in Zhejiang contains abundant fossil plants. Since most of the fossils are so fragmentary, it is difficult to make a definite determination at specific level. The cuticle remains are very rare; only two species were reported (Chow and Tsao, 1979), namely, Pseudofrenelopsis parceramosa (Font.) Watson and P. papillosa (Chow et Tsao). This paper deals with several specimens of Gymnospermae, paying particular attention to the characteristics of the cuticular structure. These specimens belong to Nilssonia, Pseudofrenelopsis, Cupressinocladus and Brachyphyllum respectively, all being yielded from the four localities: 1. Suqin of Gymnospermae, paying particular attention to the characteristics of the cuticular structure. These specimens belong to Nihsonia, Pseudafrenelopsis, Cupressi-nocladus and Brachyphyllum respectively, all being yielded from the four localities: 1. Suqin of Xinchang County (Guantou Formation); 2. Shen-jia of Zhuji County (Shouchang Formation); 3. Pingshan of Lin’an County (Shouchang Formation); and 4. Laocun of Jiande County (Laocure Formation), as shown in the map of fossil localities in this paper. The subdivision of Lower Cretaceous and its correlation in both western and eastern Zhejiang are tabulated as follows (in descending order):

关键词：下表皮内面副卫细胞角质增厚 view 气孔器 SOME LOWER CRETACEOUS GYMNOSPERMAE FROM ZHEJIANG WITH STUDY ON THEIR CUTICULES 表皮构造表面构造

NAMURIAN FLORA FROM SOUTHWESTERN MARGIN OF TARIM BASIN

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

古生物学报 1991年第6期 671-677+791-792页

作者： Yao Zhao-qi (nanjing institute of geology and palaeontology, academia sinica, nanjing 210008)

No Namurian plants from the Tarim basin in southern Xinjiang have been described so far, though scarce records of the Carboniferous plants were occasionally cited in some geologic literature. Owing to the lack of desc... 详细信息

关键词： Tarim basin Namurian flora Euramerican floral province Angara floral province

DISCOVERY OF MONOGRAPTIDS IN BASAL PART OF LOWER SILURIAN FROM S. ANHUI WITH SPECIAL REFERENCE TO THEIR ORIGIN

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

古生物学报 1990年第2期29卷 211-215,269页

作者： Li Ji-jin(nanjing institute of geology and palaeontology, academia sinica)

For a long time, the evolutionary series of a idoraptids-dimorphograptids-monograptids has been generally recognized by graptolite researchers. In the past years, the akidograptids were found to appear in the Lower Silurian Parakidograptus acuminatus Zone, while the dimorphograptids in the P. acuminatus and Orthograpius vesiculosus Zones, but the monograptids appeared as late as in the O. vesiculosus zone; this evolutionary series can be easily accepted by other people. Chen Xu and Lin Yao-kun (1978) pu...

关键词： evolutionary earliest Anhui theca probably basal genera Silurian portion locality

DISCOVERY OF LATE CRETACEOUS PALYNOFLORA FROM FILDES PENINSULA, KING GEORGE ISLAND, ANTARCTICA AND ITS SIGNIFICANCE

在线全文

学校读者我要写书评

暂无评论

古生物学报 1990年第2期29卷 143-145,258页

作者： Cao Liu(nanjing institute of geology and palaeontology, academia sinica)

This paper makes an analysis and study on altogether 8 palyniferous samples from the volcano-sedimentary rock series in the Half Three Point area of the Fildes Peninsula, King George Island, Antarctica, the rock series being grey tuffaceous siltstone in lithological characters, about 5m in thickness. Only after making a number of analyses, could we find the relatively abundant sporopollen fossils from 4 samples (Nos. GWP 4—7). But the fossils are poorly preserved, and most of them can hardly be identifi...

关键词： sedimentary rock abundant volcanic assemblage genera strata hardly Tertiary Cretaceous

A NEW SPECIES OF THE FRESH-WATER GENUS NOTODROMAS (OSTRACODA) FROM HEILONGJIANG, NORTHEAST CHINA

在线全文

学校读者我要写书评

暂无评论

微体古生物学报 1991年第2期 164-169页

作者： John W. Neale (Department of geology, University of Hull, England) Zhao Yu-hong~* (nanjing institute of geology and palaeontology, academia sinica, nanjing 210008)

The new ostracode Notodromas sinensis from a pool near Daqing City, Heilongjiang, Northeast China, is described. A full account of the morphology of this species is given in order to elucidate the terminology used in such studies. Attention is drawn to features that are regarded as important in the classification of freshwater ostracodes.

关键词：介形类新种介形亚纲 OSTRACODA A NEW SPECIES OF THE FRESH-WATER GENUS NOTODROMAS FROM HEILONGJIANG NORTHEAST CHINA