Updates:
April 4, 2008 updated Manning Canyon page
January 8, 2008 updated Inyoites pages
November 17, 2007 updated Meekoceras and Inyoites pages
October 13, 2007 added acknowledgements to the about page
September  28, 2007 updated Oxfordian page
February 18, 2007 added Late Coniacian page
January 7, 2007 updated Permian
May 20,2006 added 34 pictures throughout the site
December 27, 2005 Added Biostratigraphic List
October 9, 2005 updated Ordovician
July 10, 2005 Updated Spathian, Systematic list, Alphabetic list, and References
July 8, 2005 Updated Santonian page
June 4, 2005 Updated some broken links
January 29, 2005 added Ordovician Zone G-1 page
January 2, 2005 added Prionocyclus novimexicanus and P. wyomingensis biozone pages, updated P. macombi page
October 24, 2004 added Stairsian, Zone D (Early Ordovician) page
October 18, 2004 added Tulean, Zone G-2 (Early Ordovician) page
September 14, 2004 added Chadian (Early Mississippian) page
May 10, 2004 Updated Ordovician
March 25, 2004 Updated the Lists
February 19, 2004 added Lusitanoceras granosum zone page
January 4, 2004 added Manning Canyon Shale Cephalopods
October 15, 2003 Updated and moved to Ammonoid.com
July 31, 2003 Updated Anasibirites Bed Pages
June 25, 2003 Added Eumorphoceras girtyi photo
March 17, 2003 Added Anasibirites Bed Pages
January 3, 2003 Updated Turonian
December 19, 2002 added Turonian Scaphites page
November 20, 2002 fixed some broken links
November 12, 2002 updated links
April 4, 2002 updated links
March 8, 2002 experimenting with Maps page
August 28, 2001 updated Links
July 19, 2001 updated Smithian
June 27, 2001 updated Triassic
May 23, 2001 added Forum
January 17, 2001 updated links
Nov. 6, 2000 updated Pendleian and Arnsbergian