Boundaries
These occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle.
Divergent
Who created the continental drift theory?
Alfred Wgener
Columns of oceanic crust that are drilled along the ridge of the plate boundaries and it’s crust is carbon dated to determine the age.
Ocean Drilling
Plates with dense material that remains at the top while heavier sinks to the bottom.(Ocean plate or land plate)
Oceanic continental convergent
What is the typical rate of spreading of the Sea-Floor
2-20 cm/year, average about 5 cm
Colliding that can result in mountains, ridges, and volcanoes.
Convergent
Pangea
Volcanoes developed over a mantle plume
Hot Spots
Plates can’t slide beneath one or the other which forced it up creating a mountain range.
Continental continental convergent
A rift valley is a large crack in the earth’s surface formed by shifting plates
Rift Valley
When plates slide past each other example, San Andreas fault in California .
Transform
The theory explaining the structure of the earths crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle.
Plate tectonics
The branch of geophysics concerned with the magnetism in rocks that was induced by the earths magnetic field at the time of their formation.
Paleomagnetism
Existence of volcanic arcs and the creation of islands
Oceanic-Oceanic Convergence
Where one lithospheric plate is dragged or pushed below another lithospheric plate
Subduction Zone
Tracking earthquakes, can trace the outline of interacting plate boundaries giving evidence that the plates are in fact moving and acting.
Earthquake patterns