Geology+Information

-Continental-continental collision---> when two plates collide into each other, mountains and volcanos are formed. EX: Mt.St Helens, Himilayans, Rocky Mountains, Appalacian Mountains -Oceanic-oceanic subduction---> when two plates spread apart this forms rifts and ridges. EX: Mid Ocean Ridge -Oceanic-continental subduction---> One plate slides under the other this is where volcanos are under water and erupts over and over again and starts to form Island arcs. EX: Japan, Hawaiian Island -An area of volcanic activity that develops above rising plumes of magma is a **__hot spot__** -The **__Mid Ocean Ridge__** is a huge under water mountain ranges that are present in every ocean and circle earth. - **__Subduction__** is where one plate sinks under the other. -A **__transform boundar__**y is where two plates move past each other in opposite directions. -Where plates with continental crust push together this is called **__Continental- continental collision,__** this forms mountains. [|-Boundaries] > this website is very helpful it has A LOT of needed information! -A __**divergent boundary**__ is when two plates move away from eachother  More Information;  -rift valleys are formed here  -normal faults are here  -mid-ocean ridges are found along these boundries  -magma comes up form the mantle to make new ocean floors along this boundry  -weak, shallow eathquakes occur here -__**Convection currents**__ is the motion created when heated material continually rises and cools and sinks. Convergent Boundry More Information; -volcanic islands are formed along this boundry <span style="border-collapse: collapse; font-family: 'Trebuchet MS',Verdana,sans-serif; line-height: normal;">-mountains are formed along this boundry <span style="border-collapse: collapse; font-family: 'Trebuchet MS',Verdana,sans-serif; line-height: normal;">-reverse faults are found here <span style="border-collapse: collapse; font-family: 'Trebuchet MS',Verdana,sans-serif; line-height: normal;">-deep, strong earthquakes occur here <span style="border-collapse: collapse; font-family: 'Trebuchet MS',Verdana,sans-serif; line-height: normal;">-The __**asthenesphere**__ is the layer of hotter, softer rock in the upper mantle <span style="border-collapse: collapse; font-family: 'Trebuchet MS',Verdana,sans-serif; line-height: normal;">-