Geologic Time Scale

The Geologic Record: Definition & Timeline

Geologic Formations - Pictured Rocks National Lakeshore (U.S. National Park Service)

A fascinating challenge to the established view of Earth's history is presented here! The logic is sharp: if every speck of dirt shares the same fundamental age, what's the real story behind layers supposedly being younger? The comparison to shuffling a deck of cards to explain younger layers landing on top is a powerful analogy that forces a re-think on the very concept of the geologic column. Furthermore, the insight into how layers are dated—often by the dinosaur fossils they contain, automat

Watch Earth's History Play Out On A Football Field