Need a quick reference to the geologic time scale of Earth's history? Try out our Free geotimescale application on your iPhone™ or iPod touch®!
Find out, for example, when dinosaurs ruled the world or when reptiles first appeared. This is an excellant reference for students, educators, professional geologists, or anyone interested in geology. There are two different views featured: Geologic Time Scale With and Without Ages. The app is completely self-contained. No internet connection required. Ideal for field use.
The "Geologic Time Scale Without Ages" view shows the names of eons, eras, periods, and epochs and their corresponding dates.
Touching the "With Ages" button adds the names of the ages within the epochs along with their corresponding dates.
Touching any "info" icon 
will display text that describes what significant event occurred at that time.
