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Newman, William L.
Earth history, Fossils, Geochronology, Geologic history, Geologic time scales, Geology, Posters, Radiometric dating

Geologic time online edition [More info]
Booklet giving general explanations of geologic time, major divisions of geologic time, relative and radiometric time scales, index fossils, and the age of the earth.
The Geologic Time Spiral - A Path to the Past [More info]
Poster depicting the changes in the Earth and its life throughout its history.