Mod+7.8+-+Jordan+B

=CONVERGENT= Convergent Boundries are plates that colide with or dive under another.There are many different ways this can occur.The himilayas are a result from two landmasses colideing together.The over laying plate forms mountain ranges. India and Asia crashed 55 million years ago forming the Himilayas. With ocean-ocean converges,one plate dives beneath under the other.That forms deepsea trenches like the Maiana trench in the North Pacific ocean.These types of collisians can form underwater volcanoes.Convergent Boundries also occure when a plate of ocean dives under a landmass.This is called subduction.An example of this is the Juan de fuca oceanic plate.It is subducting beneath the westword moving North American Continental plate. Himilayas



=DIVERGENT= Divergent Boundries occur when magma rises and pushes plates apart.Mountains and volcanoes rise against the sea. This process renews the ocean floor and widens the giant basis.New crust is processing as the plates are pulling away from each other.

Examples

1.The great rift valley in africa formed when the plates were tugged apart.If these plates continue to diverge,millions of years from now eastern africa will split from afica and form a new landmass,An ocean ridge will form when this happes. 2.The red sea is activly forming,That is another example of divergent.The Aribian penninsula and africa were once linked together,which formed a continent.Now there being ripped apart.The red sea is being formed as they move apart. 3.Another example is the Mid-Alantic Ridge.The Mid-Alanti Ridge is splitting from Iceland.By this splitting the North American and Eurasian plates are sepertaing. TRANSFORM Tranform boundries often happen when two plates grind against each other.Most transform faults are found on the ocean floor.The crust is neither created or destroyed,the plates simply slide past each other.Unlike the other two boundries,transform boundries dont form mountains or volcanoes.Instead they cause earthquakes.The haulting motion causes these large earthquakes. Examples 1. The San Andres fault is in California.It connects the East Pasific Rise a divergent boundrey to the south,with the South Gorda Juan De Fuca. 2.Mountains rubbing against each other. 3.Other things grinding against each other

=Sites Used=

//National Geographic-plate tectonics//. Web. 17 Nov. 2009. .

//Plate tectonics//. Web. 13 Nov. 2009. .

//Mid-Alantic Ridge//. Web. 13 Nov. 2009. .