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奥陶世

网络Ordovician; Tremadocian; Early Ashgill

奥陶世

奥陶世

奥陶世

Ordovician

奥陶世（Ordovician）是指古生代中五亿五百万到四亿三千八百万年前这段时间，主要分为三个时期－奥陶世早期 (五亿五百万 …

Tremadocian

....482～481Ma为变质成因锆石的年龄,代表了早奥陶世(Tremadocian阶)松辽盆地基底的变质增生作用,该变质过程可能与盆地西 …

Early Ashgill

.... medioseptatum(Neuman)及晚奥陶世(Early Ashgill期)涧草沟组中首次发现的四射珊瑚Crassilasma sp..全文共描述四射珊瑚1…

1

The tectonic framework of North Qilian in Early Ordovician should be similar to that of the Bafin Bay and the Queen Elizabeth Islands .

北祁连早奥陶世海域与现在加拿大北部巴芬湾及伊丽莎白女王群岛的构造格局相似。

2

This was the result from the large-scale regression in the Late Ordovician.

这是晚奥陶世晚期大规模海退的结果。

4

late Ordovician volcanic -subvolcanic formation .

晚奥陶世熔岩 -次火山岩组。

5

The China paleo-plates splitted into North China and Yangtze paleo-plates and Qinling limited ocean basin in middle Ordovician Epoch .

显生宙以来，古中国板块裂解为华北、扬子古板块，秦岭有限洋盆的时期为中晚奥陶世。

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In addition , in the late Ordovician, Carboniferous and Silurian, tazhong area may have small-scale volcanic activity .

此外，中晚奥陶世、志留纪和石炭纪也可能发生过小规模的火山活动。

8

Sedimentary Successions and Environments of the Late Ordovician Wenchang Formation in Tonglu, Zhejiang

浙江桐庐晚奥陶世晚期沉积层序和沉积环境分析

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Geochemical characteristics of paleoseawater from the Early Ordovician of Yangtze Craton : Evidence from the trace elements in conodonts

扬子克拉通早奥陶世古海水地球化学特征：来自牙形石微量元素的证据

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Characteristics of Cambrian -Palaeo-ordovician Strata Sequences in Zaozhuang Area

枣庄地区寒武纪 -早奥陶世层序地层特征

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