Plate tectonics & plate margins -...
Transcript of Plate tectonics & plate margins -...
F O R M 2 - 2 0 - T E R M 1
PLATE TECTONICS & PLATE MARGINS
THE EARTH’S STRUCTURE
CONTINENTAL DRIFT
CONTINENTAL DRIFT- EVIDENCE
CONVECTION CURRENTS
HOW DO PLATES MOVE?
HOW DO PLATES MOVE?
PLATE MARGINS/BOUNDARIES
DIVERGENT BOUNDARIES
PILLOW LAVA
MID-ATLANTIC RIDGE
ICELAND (VOLCANIC COUNTRY)
CONVERGENT BOUNDARIES
OCEANIC-CONTINENTAL CONVERGENCE
(SUBDUCTION MARGINS)
OCEANIC-OCEANIC CONVERGENCE
CONTINENTAL-CONTINENTAL CONVERGENCE
(COLLISION MARGIN)
TRANSFORM BOUNDARIES
CONSERVAT IVE BOUNDARIES
A FEW, HOWEVER, OCCUR ON LAND. FOR EXAMPLE, THE SAN ANDREAS FAULT ZONE IN CALIFORNIA IS A TRANSFORM FAULT
THAT CONNECTS THE EAST PACIFIC RISE, A DIVERGENT BOUNDARY TO THE SOUTH, WITH THE SOUTH GORDA -- JUAN DE FUCA -- EXPLORER RIDGE, ANOTHER DIVERGENT BOUNDARY TO THE
NORTH.
THE EARTH’S TECTONIC PLATES
CARIBBEAN PLATE