Texas Instruments
Texas Instruments: Geologic Time Line
A time line of Earth's geologic periods from 600 million years ago.
University of Utah
University of Utah: Genetic Science Learning: learn.genetics: Geologic Time
Appreciate the immensity of geologic time by scrolling through a timeline. Includes links to relevant portions of a video lecture and a detailed time line.
Center for Educational Technologies
Earth Floor: Geologic Time
This is a nice explanation of geologic time and Earth's major eras. Although this site is designed for younger students, it is mostly text with few images.
Ohio History Central
Ohio History Central: Time Line of Ohio History
A comprehensive timeline of events in the prehistory and history of Ohio. Hyperlinks to the multitude of specific articles about Ohio's history.
BBC
Bbc Nature: Prehistoric Life
Explore life on ancient Earth with this site! Students can walk with dinosaurs to see what Earth looked like or investigate Earth's history. The site includes articles, pictures, timelines, and lots more.
Other
Valparaiso University: William Morris Davis
An extensive biography of William Morris Davis (1850-1934 CE), often called "The father of American geography." He was one of the founders of the Association of American Geographers and a regular contributor to the National Geographic...
PBS
Nova: Magnetic Storms: When Compasses Pointed South
Earth's magnetic poles have reversed themselves throughout its long history. Find out what scientists know about these reversals. A geologic time line shows when the reversals occurred.
University of California
Ucmp: Sequencing Time
Lesson plan in which students place events in sequence, comparing their life to the history of the Earth.
Children's Museum
Children's Museum of Indianapolis: Geologic Timeline
Here is an excellent example of a picture timeline. Follow the Eras of the Earth from Cenozoic all the way down to Precambrian with the use of fossils.