Mod+2+-+Josh+M


 * __Dynamic Earth__

__Convergent Boundaries__ ** A plate collides with another or dives under another,creating a mountain. When the plate dives under another it is called subduction,the younger plate usually goes under the older and melts when diving one hundred miles down into the mantle. When this happens it forms, mountain ranges and can also form islands. One Example of this would be Mount Everest,every year the plates are colliding pushing the mountain up higher and higher, tommorow it could be slightly taller The Eastern Caribbean islands of Martinique, St. Lucia and St. Vincent are examples of islands created from subduction.

__Divergent Boundaries__ This is when magma rises from the mantle and pushes two plates apart. When this happens it renews the oceon floors and it can also make basins wider. An example is Eastern Africa,millions of years from now it could break off from the rest of the continent. When a divergent boundary forms under oceanic lithosphere it produces mid-oceanic ridge. When force creates a deep fissure in it magma rises and fills in the fissure.

__Transform Boundaries__ Where two plates collide and begin to grind with one another. They are usually found in the ocean basin and connect offsets in the mid-ocean ridges. These are called strike slip faults. When this happens usually large earthquakes are triggered. Transform faults always go in the opposite direction of strike slip faults. An example is the earthquake in San Fransisco that destroyed parts of it. Two other examples would be the San Andreas Fault and the Alpine fault.