Plate Boundaries

Spreading zone” – plates moving AWAY from each other   

• convergent boundary
• divergent boundary
• transform boundary

Plates slide HORIZONTALLY past each other without much upward or downward movement

• convergent boundary
• divergent boundary
• transform boundary

Mid-ocean ridge – huge underwater mountain chain where plates move APART, molten rock moves upward and fills the space between the plates – in the ocean.

• convergent boundary
• divergent boundary
• transform boundary

Fracture Zone” - San Andreas Fault

• convergent boundary
• divergent boundary
• transform boundary

Subduction zone” – plates move TOWARD each other and convergent  divergent  transform one plate moves UNDER the other plate – oceanic plate subducts under the continental crust. 

• convergent boundary
• divergent boundary
• transform boundary

Nazca plate and South American plates COLLIDE to form the Andes Mountains 

• convergent boundary
• divergent boundary
• transform boundary

Conservative plate boundary because NO crust is created NOR destroyed at this plate boundary

• convergent boundary
• divergent boundary
• transform boundary

Arabian plate and African plate PULLING AWAY forming the Red Sea

• convergent boundary
• divergent boundary
• transform boundary

Indian and Eurasian CRASH together to form the Himalaya Mountains 

• convergent boundary
• divergent boundary
• transform boundary

Normal fault – pulling or tension 

• convergent boundary
• divergent boundary
• transform boundary