Comprehending Geological Time [ Teens/Mature Teens ] - 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.
Dr. Bob's Geologic Time Page [ Mature Teens ] - Basic information about the geologic time scale and mnemonics to help remember the various periods and epochs.
Earth Floor: Geologic Time [ Teens/Mature Teens ] - Explains how the age of the earth is divided up into periods of time, and provides simple definitions and illustrations of the different names.
Fugue No. 16: G Minor [ Kids/Teens/Mature Teens ] - Listen to the music piece while reading about how the geology and ecosystems of Grand Canyon, AZ are like a Bach fugue.
Geological Time Line [ Teens/Mature Teens ] - A simple chart provides links to further details of each era, and an interactive feature allows users to see global shifts and milestones.
Life Through Geologic Time [ Kids/Teens/Mature Teens ] - A pictorial history of life on Earth, with events and fossils linked from the relevant period or epoch.
Web Geological Time Machine [ Kids/Teens/Mature Teens ] - A simple table of the different time periods contains links to details of the rocks, fossils and locations of each one.
