奥陶纪

鄂东南奥陶纪地层沉积特征及沉积作用研究

Study on the sedimentary characteristics and sedimentation of the strata in Ordovician period in Southeastern Hubei

马蹄蟹素有“活化石”之称，最古老的马蹄蟹化石可追溯到奥陶纪。

Horseshoe crabs are considered " living fossils . " The earliest horseshoe crab fossils are dated to the Ordovician period .

利用背散射电子（BSE）研究奥陶纪部分笔石的始端发育和分枝方式

Interpretation of the proximal development and branching divisions of some early and Middle Ordovician graptolites based on BSE images

经过大量野外实地观察及前人研究成果，针对奥陶纪钱塘江世以来研究区域处于局限前陆盆地的总体背景，把黔北地区的志留系划分为7个三级沉积层序（SS1至SS7）。

Based on the observation of outcrops , previous research findings and the background of confined foreland basins , the Silurian strata in northern Guizhou province are divided into seven 3rd-order sequences ( SS1 & SS7 ) .

自奥陶纪至古近纪约5亿年期间发育一套基本连续的海相沉积，厚度达14km，是研究特提斯洋形成演化的最佳地区。

There developed basic unharmed marine strata being about 14 000 m in thickness during about 50 million years from the Ordovician to the Paleogene .

海南岛万宁发现奥陶纪地层

Stratum discovery of the Ordovician from Wanning area , Hainan Island

扬子区奥陶纪&志留纪横板珊瑚的发生、迁移与生物古地理

Origin , emigration and paleogeography of Ordovician-Silurian Tabulata in Yangtze Region

米仓山南缘奥陶纪地层新见

A new view on the Ordovician stratigraphy in the southern Micang mountain

扬子海盆奥陶纪末介壳动物群的分布及其古地理意义

Distribution of Latest-Ordovician Shell Fauna in Yangtze Basin and Its Paleogeographic Significance

鄂尔多斯盆地南部奥陶纪末端变陡缓坡沉积模式

Sedimentary model of distally steepening ramp of Ordovician in southern Ordos Basin

上杨子区奥陶纪桐梓期的白云岩成因

Genesis of Dolomites in Tongzi Period of Ordovician in Upper Yangzi Region

东喀喇昆仑山奥陶纪鹦鹉螺化石新材料

New Ordovician nautiloids from Eastern Karakorum Mountains , SW Xinjiang

新疆阿尔金山奥陶纪三叶虫的发现

Discovery of the ORDOVICIAN TRILOBITES in Altun mountains , Xinjiang

华北地台及其西缘奥陶纪三叶虫相

ORDOVICIAN TRILOBITE biofacies of North China platform and its western marginal area

上海志留纪、奥陶纪地层新发现化石及其地层意义

New Fossils in Shanghai Silurian & Ordovician Period and Their Stratigraphic Significance

奥陶纪生物的两极分布及其与生物地理的关系

The bipolar distribution and biogeography of the Ordovician faunas

贵州奥陶纪年代地层探讨

A Discussion on Chronostratigraphy of Ordovician in Guizhou Province

塔里木盆地寒武&奥陶纪海平面升降变化规律研究

Study on Eustatic Sea - Level Change Rule in Cambrian-Ordovician in Tarim Basin

Hypermecaspis（三叶虫）的蜕壳塔里木盆地奥陶纪海平面变化

Study of the Fluctuation of Sea Level During Ordovician Period in Tarim Basin

奥陶纪笔石体的复杂化及其与海平面变化的关系

Relationships between RHABDOSOME complication and Ordovician sea level changes

新疆柯坪地区奥陶纪和早志留世的化石带

Graptolite zone of the Ordovician and Early Silurian in Kalpin region , Xinjiang

西准噶尔地区中奥陶纪火山岩的地球化学特征

Geochemical characteristics of the Middle Ordovician volcanic rocks , western junggar , xinjiang

广西恭城奥陶纪笔石动物群特征与沉积环境

Ordovician graptolite fauna characteristics and sedimentary environment of Gongcheng , Guangxi , China

新疆巴楚和柯坪地区奥陶纪&泥盆纪腹足类

Ordovician-devonian gastropods from Bachu and Kalpin districts , Xinjiang

美国阿巴拉契亚山脉芬卡苏地区奥陶纪海底水道中的内潮汐沉积

Internal-tide Deposits in an Ordovician Submarine Channel , Fincastle , Appalachians , USA

首次发现轮南地区奥陶纪生物礁。

Ordovician organic reefs were first discovered in the Lunnan area , northern Tarim .

安徽和县奥陶纪牙形石生物地层的研究

Ordovician conodont biostratigraphy in hexian , anhui Province

寒武纪&奥陶纪塔里木盆地经历了4种不同类型的碳酸盐岩台地结构型式的演变。

Tarim Basin goes through the evolution of four different carbonate platform structure types .

北祁连奥陶纪洋脊扩张速率及古洋盆规模的岩石学约束

Petrologic restrictions on the Ordovician ocean basin scale and spreading rate in Qilian area

北祁连肃南一带奥陶纪硅质岩沉积地球化学特征及其多岛洋构造意义

Sedimentary Geochemistry and Tectonic Significance of Ordovician Cherts in Sunan , North Qilian Mountains