How Fossils Are Dated - A summary by Glen Kuban
The Geologic Time Table - By Andrew MacRae. Includes an essay on dating methods and a geologic time table.
Geologic Time Scale by GSA - Detailed Geologic Time Scale by the Geologic Society of America.
On the Right Track - By Glen Kuban. An article on the relevance of Trace Fossils to Extinctions, published in the April 1997 MAPS Expo Digest.
Ice Age Paleoecology - By Scot Elias. Discusses Quaternary plants and animals and their environment.
Making The Geologic Time Scale Real - Making The Geologic Time Scale Real. An excercise to help teachers convey the geologic time scale to students.
Geologic Time Scale, Miami University, Ohio - A small chart accompanied by good essay on geologic time.
National Physical Lab Timescale
IAMG Geologic Time Chart Detailed Chart, in Color
Geologic Time Machine, Univ. Ca. at Berkley