Plate Boundaries

• Divergent boundary- the plate move apart to each other
• What happen when ocean and continental collide?

  Formation of earthquake, trenches and Volcano arc nearnear the edges of the leading plate
• Why was the volcano form?

  Due toto the subduction - the crust blend toward the mantle
• What happen to the plate that been subduct?

  It will melt due to the mantle since mantle has higher temperature than crust
• Trench is also called submarine valley
• The Philippines trech is one of the deepest trech that has 10 540m deep
• What happen to the collision of the converge?

  Grinding
• How was the earthquake form inin continental and oceanic  converge?

  The subducting plate will affect the earthquake
• What is the average depth of focus?

  60
• What is the longest depth of focus?

  300 - 700m
• How many and where the energy release from the earthquake

  85% of its from the shallow earthquake and 12% of its from intermediate earthquake
• Intermediate earthquake has a depth of what?

  60 - 300km
• One of the source of earthquake

  Trench
• Underwater earthquake causes

  Tsunami
• Tsunami- a series of ocean wave and large wavelength due to the disturbance of ocean. Also mean harbor wave
• Parallel to the trech?

  Volcanic arc
• Chain of volcano position in an arc way

  Volcanic island arc
• How does Philippine made?

  Collision of Eurasia and Pacific plate
• Majority of Philippines archipelago are part of?

  Philippine mobile belt
• Palawan, Zamboanga, Mindoro are part of 


  Sundaland block of eurasia
• Philippine mobile belt and sundaland collide forming?

  Manila-Negros-Cotobato systemsystem and suluSulu trench
• It is a product of subducting Philippine plate and it's archipelago? 


  Philippine trench and east Luzon trench
• Aside from trech, the collision of ocean to ocean formed

  Volcanic chain, earthquake and mountain ranges
• S continental to continental there is no subduction occur
• In continental to continental plate, a mountain ranges occur
• The collision of Eurasia and India results in the formformation of Himalayas
• Collision of continental andand continental result to an earthquake
• Indication thaht the crust is splitting apart?

  Formation of rift Valley and oceanic ridges
• Where most of the divergent situated?

  Along oceanic ridges
• How many centimeters dies the divergence has

  2 - 20cm anuallly
• Mid Atlantic ocean ridge- example of divergent boundary that causes the separation of african and South american
• When a spreading center develops within a continent, the crust may break into several segment
• The spreading of the continent lead to the down faulted valley called rift valley
• The new sea floor is from the heat rising in the mantle
• As the rift Valley increases, it also increases the depth and length such as the red Sea today
• Most transform faults join two segments of a mid-ocean ridge
• When the platesplates are adjacent to each other, a new manifest form, the strike slip facult
• Most of the transform fault located in the ocean basin, not at all for example the San Andress Fault
• Radiometric dating- determine the age of a volcano.
• Scientists says that the Farther the Volcano from the Hawaii, the older it is and less active