Mountains form in different ways Fault-blockForm when huge tilted blocks of rock separated from surrounding rock by

large faults

FoldedForm by compression forces folding rock layers.

UnwarpedForces push up Earth’s crust and allow the sedimentary rock to erode;

leaving igneous or metamorphic rock

VolcanicLayers of lava form a cone-shaped mountain of igneous rock.

Folded Mountains

Fault-Block

Volcanic

Unwarped

Underwater

Mid Ocean Ridge an underwater mountain range formed by plate

tectonics. The uplifted sea floor results from convection currents in the mantle. Lava erupts there, creating new crust upon cooling. A mid-ocean ridge makes the boundary between two tectonic plates and is a divergent plate boundary.

Plateau n. pl. pla·teaus or pla·teaux (-t z ) 1. An elevated,

comparatively level expanse of land; a tableland.

Island n. A land mass, especially one smaller

than a continent, entirely surrounded by water.

Trench/Rift

Mountains form in different ways Fault-blockForm when huge tilted blocks of rock separated from surrounding rock by

large faults

FoldedForm by compression forces folding rock layers.

UnwarpedForces push up Earth’s crust and allow the sedimentary rock to erode;

leaving igneous or metamorphic rock

VolcanicLayers of lava form a cone-shaped mountain of igneous rock.