Analyzing the Rock and Fossil Records

Front

Age of Earth

Back

4.6 Billion Years

Front

Age of rocks compared to others

Back

Relative Age

Front

Oldest rock layers are on the bottom

Back

Superposition Principle

Front

Canyons caused by:

Back

Lateral Continuity

Front

Simple fossils in older and younger layers

Back

True

Front

Complex fossils found only in younger layers?

Back

False

Front

Fossils disappear from the record

Back

Creature has become extinct

Front

Definition of Mass Extinction

Back

Many species died in a short period of time.

Front

Magma contains older rock pieces

Back

Inclusions

Front

Uniformitarianism principle

Back

Sedimentary rocks not always horizontal