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International Chronostratigraphic Chart “Version 2018/08”

International Chronostratigraphic Chart “Version 2018/08”

Geology Page - January 21, 2019

International Chronostratigraphic Chart “Version 2017/02”

International Chronostratigraphic Chart (v2016/12)

International Chronostratigraphic Chart (v2016/04)

Ordovician Carbon Isotope Curve

International Chronostratigraphic Chart “Version (v2015/01)”

Geology Page - March 31, 2015

International Chronostratigraphic Chart “latest version (v 2014/10)”

Geology Page - December 24, 2014

International Chronostratigraphic Chart 2014

Geology Page - May 23, 2014

Ordovician Chronostratigraphic Chart

Geology Page - August 12, 2013

Global chronostratigraphical correlation table for the last 2.7 million years

Geology Page - June 8, 2013

International Chronostratigraphic Chart 2013

Geology Page - May 17, 2013

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