 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 Societies2293days since 9807days since (CC) 2018 PHL @ UPRA |
(CC) Planetary Habitability Laboratory @ UPR Arecibo, 2018
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