Geology

Study of the Earth

Coal

Combustible rock.

Minerals

Minerals have different colors..

Landslides

Dislocation of land.

Mountains

Mountains have roots.

Earth

Rotating sphere.

Pumice

Least dense stone on Earth.

Sinkhole

Natural hole in the ground.

Volcano

Tremors precede eruptions.

Aftershocks

Delayed weaker quakes.

Subduction

Rocks sink underground.

Fault Lines

Cracks and fault lines.

Earthquake

Displacement of land.

Soil Expansion

Causes potholes.

Internal Mountains

400 km below surface.

Tectonics

Mountains move.

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