Geologic Time Vocab

Front

Oldest rock layer?

Back

G

Front

Determining rock layer ages using diagrams

Back

Relative Dating

Front

Youngest fossils layer

Back

D

Front

Different fossils and rock layers in locations

Back

Rock layers could have worn away over time.

Front

Geologic processes today = ?

Back

Uniformitarianism

Front

Oldest rocks at the bottom, youngest at the top

Back

Law of Superposition

Front

Evidence for geologic time scale

Back

Fossils, radioactive decay, rock layers

Front

Trilobite as an index fossil

Back

Appears in 1 layer, all locations

Front

Youngest rock layer

Back

H

Front

Fossils reveal about Earth:

Back

Life changes, climate changes, features changes