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[ISOS] Hirnantian GSSP protected by the ... (2008-1-16)

The Hirnantian GSSP was ratified by the IUGS in May of 2006 with its stratotype section at Wangjiawan North, Yichang, Central China. The base of the Stage is marked by the FAD of the graptolite Normalograptus extraordinarius (Sobolevskaya). Very recently,... [more]

[ISOS] Ordovician correlation chart compiled ... (2007-7-3)

If you have any comments, please send email to Profs. Stig Bergstrom (stig@geology.ohio-state.edu) or Chen Xu (xu1936@yahoo.com) before Sep. 1st, ... [more]

[ISOS] Website for the Nanjing Conference (... (2007-4-23)

http://www.ordovician.cn/conference

Please register online, so we can arrange the hotel, conference bag, meals and others for you.

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[ISOS] Ordovician timescale update - comment ... (2006-9-19)

Ordovician timescale update&... [more]

[ISOS] Second Circular of the Yangtze ... (2006-8-17)

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[ISOS] Chairman calls for comments (2006-7-16)

Dear colleagues:

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