Transcript Plate tectonics lab

Plate tectonics lab
1
Convergent Boundaries
• Oceanic to Continental boundary impact - The
oceanic plate ALWAYS subducts (goes under)
• Called Subduction: Oceanic crust pushed down to
mantle, where it is
melted and rises.
See picture
Forms: trenches
2
Convergent Boundaries
• Continental to Continental boundary impact
• Mountain formation
• Causes: Uplift(mountain building)
Rocky Mountains
3
Divergent Boundaries
• Two Oceanic plates-Forms Mid ocean-rifts
• Called: sea floor spreading: makes new crust
Mid-Atlantic Rift
4
Divergent Boundaries
• Two continental plates- Form rift valleys
• Called Subsidence which forms valleys
Great rift Valley formed by divergent plates
5
Transform Boundaries
• Transform plates create
earthquakes!
• Oceanic or Continental plates
rubbing
San Andreas fault: California