They are formed by the cooling of magma.

They are formed by the compression of organic material over millions of years.

They are formed by the erosion of rocks.

They are formed by the evaporation of seawater.

Coal forms in marine environments, while oil and natural gas form in freshwater environments.

Coal forms from plant material in swampy areas, while oil and natural gas form from microscopic marine organisms in ocean environments.

Coal forms from volcanic activity, while oil and natural gas form from sedimentary rock.

Coal forms from the cooling of magma, while oil and natural gas form from the evaporation of seawater.

The mountaintop was once a desert.

The mountaintop was once covered by a glacier.

The mountaintop was once underwater, likely part of an ocean or sea.

The mountaintop was once a volcanic area.

Weathering

Compaction & cementation

Mud slide

Erosion

Compaction & cementation

Weathering

Deposition

Erosion

Step A

Step C

Step D

Step E

Layer C

Layer D

Layer E