Earth Floor: Geologic Time Explains how the age of the earth is divided up into periods of time, and provides simple definitions and illustrations of the different names. http://www.cotf.edu/ete/modules/msese/earthsysflr/geotime.html Cotf.edu~Site InfoWhoisTrace RouteRBL Check
Comprehending Geological Time An interactive tool to calculate time periods and human history in terms of different measurement scales such as a meter, a day or a million years. http://www.athro.com/geo/hgfr1.html Athro.com~Site InfoWhoisTrace RouteRBL Check
Geological Time Line A simple chart provides links to further details of each era, and an interactive feature allows users to see global shifts and milestones. http://www.bobainsworth.com/fossil/timeline.htm Bobainsworth.com~Site InfoWhoisTrace RouteRBL Check
Fugue No. 16: G Minor Listen to the music piece while reading about how the geology and ecosystems of Grand Canyon, AZ are like a Bach fugue. http://jan.ucc.nau.edu/~tas3/wtc/ii16.html Nau.edu~Site InfoWhoisTrace RouteRBL Check