Template:Ordovician graphical timeline is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
Can you people revert these colors to the USGS Colors. So that the colors on the Geological History and the Geologic Time scale template's color correspond to this templates colors. 184.108.40.206 (talk) 22:09 9 March 2013 (UTC) 5:09pm 03/09/2013 EST. Reference cited for first terrestrial spores states that they were in Llanvirn, not Arenig, which is earlier, as shown. Would someone please correct this?220.127.116.11 (talk) 16:29, 22 June 2013 (UTC)