Geologic Time Scale. Source: Geologic Time Scale, Geological Society of America, 1999, from Boggs, 2006.. . Periods in this Chapter. From oldest to youngestLate OrdovicianOrdovician: 490 and 443 million years agoSilurian443 and 417 million years agoEarly DevonianDevonian: 417 and 354 million years ago.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.