 Updated Geologic Time Scale 2009 by the Geological Society of America. Description paper here. Click for PDF version. |
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ContentMain ProjectsAstrobiology CentersAstrobiology SeminarsAstrobiology Societies1838days since 9352days since (CC) 2017 PHL @ UPRA |
(CC) Planetary Habitability Laboratory @ UPR Arecibo, 2017
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