Please enable JavaScript.
Coggle requires JavaScript to display documents.
Plate Boundires (Divergent (Eruptions of mama occur underwater. (Due to…
Plate Boundires
Divergent
Locations where plates are moving towards each other.
Magma Rising to the Asthenosphere and forcing its way to the surface.
Remain hidden at depths of 2.5km
Long chains of mountains 3000m above the sea bed.
Eruptions of mama occur underwater.
Due to the magma hitting the water straight away this causes a pillow lava
Conservative
Slide past each other
Volcanic activity is absent
frictional forces often snag and cause a build up in tension
When this pressure is released it sends out massive amounts of force often causing earthquakes.
California
North American and Pacific.
Sanadreas Fault system.
Global Patterns
Plate tectonics gained acceptance in the late 1950's
Nuclear Testing underground caused shocks that where picked up on seismometers.
This showed and produced detailed seismic data worldwide that shew earthquakes were spatially concentrated into narrow bands.
Convergent (Destructive)
OCEANIC-CONTINENTAL
OCEANIC-OCEANIC
CONTINENTAL- CONTINENTAL
OCEANIC-CONTINENTAL
Different densities causing the denser one (oceanic) to sub-duct under the continental crust.
Subduction
causes deepening of the ocean. And forms an
ocean trench
An ocean trench is a long narrow depressions with depths of 6000-11000 m deep, they are usually asymmetric.
Ocean trenches mark the locations of a subduction zone.