Plate tectonics by Clayton Kramer
Published on Nov 21, 2015
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PRESENTATION OUTLINE
Convection Currents cause#1 of Plate Tectonics
- Currents in fluid that result from heating and cooling are called Convection Currents.
Photo by Jason A. Samfield
Slab pull cause #2
Slab pull is what we call the Gravity that pulls on the plates and can cause subduction.
Photo by Dru!
Ridge Push cause # 3
Ridge push is what we call the force that causes the plates to slide.
Photo by nosha
Divergent plate boundary
A divergent plate boundary is a boundary between two plates in which the plates are being pulled apart and crust is created.
Photo by Ben Andreas Harding
A Rift Valley forms from a divergent land boundary. The land is pulled apart which leaves a dip in the land. An example is the Great Rift Valley in Kenya, Africa
Photo by dmitri_66
A mid ocean ridge forms from a divergent sea boundary. The land is pulled apart but it is in the water so instead of spreading out it pops up and you get a mid ocean ridge. An example is the mid Atlantic ridge.
Convergent plate boundary
- A boundary in which two plates move together and crust is destroyed due to subduction.
Photo by Darkside_sithlord [Marlon Garcia]
The landform that results from ocean vs continent is a deep ocean trench
Photo by NASA's Marshall Space Flight Center
An island arc is formed from two convergent ocean boundaries
Photo by NASA's Marshall Space Flight Center
Subduction zone:
A zone where two of earths plates collide and subduct
Photo by Darkroom Daze
Deep ocean trench:
The lithosphere is subducted back into the asthenosphere on an ocean-ocean convergent plate boundary
Photo by NASA's Marshall Space Flight Center
An example of a deep ocean trench would be the Puerto Rican trench.
A plate boundary in which two plates slide past each other and no crust is destroyed.
Photo by NASA's Marshall Space Flight Center
