Warm Up 1/10/08 1. 1. Fossils are the ____. a. oldest layers of rock in a region b. objects that people of long ago left behind as artifacts c. living.
Geologic Time Scale Precambrian — Minimal fossil record Era, Period, Epoch Based on major changes — extinctions, mountain building events.
Geologic Time and Evolution. Earth Has a History Geologic materials record enormous changes. Earth is a complex, evolving system. – Physical and biological.
Earth Systems and Resources
