Convection Currents

3 Types of Plate Boundaries

MidOcean Ridge

Satellite View of MidOcean Ridges

Africa

South America

Eurasia

Australia

North America

MidOcean Ridge - Atlantic

Magnetic Pole Reversals

Rift Valley – Africa – Divergent Boundary

Subduction in the Cascades – North America

Subduction of the Juan de Fuca Plate under the NorthAmerican Plateforming the Cascade Mountain Range (Volcanoes)

Sonar View of the Cascades

Aerial View of the Cascades

Earthquakes along the Juan de Fuca (red) & N. American Plates (blue)

View of Cascades across the Puget Sound --Seattle

Cascades ---Volcanic Peaks

Hiking along the Northwest Coast –Rock formations from Subduction

Creek bed offset from movement along a Transform Fault

Hoover Dam evidence of Transform Fault movement

Evidence of movement along a Transform Fault

San Andreas Fault

Valley of the San Andreas Fault

Valley of the San Andreas Fault

Valley of the San Andreas Fault

Hot Spot – Formation of the Hawaiian Island & Emperor Seamounts