Absolute and Relative Dating (1/22/02) The Age of the Universe Scaled to a Single Earth Year/Geologic Time Mnemonics (1/22/02) The Kentucky Geological Society's Geologic Time Line Scaled to a Single Earth Year (1/22/02) UCMP Berkeley Geologic Time Machine (1/30/02) Plate Tectonics Activity (2/13/02) Online Plate Tectonics Links (2/13/02)