subduction
movement of the edge of a plate of the earth's crust into the mantle beneath another plate
movement of the edge of a plate of the earth's crust into the mantle beneath another plate
rift valleys
a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface
a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface
mid oceanic rige
A mid-ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges
A mid-ocean ridge is a general term for an underwater mountain system that consists of various mountain ranges
Lithosphere
the rigid outer part of the earth, consisting of the crust and upper
mantle
the rigid outer part of the earth, consisting of the crust and upper
mantle
Asthenosphere
layer of the earth's mantle, below the lithosphere, in which there
is relatively low resistance to plastic flow and convection is thought to
occur
layer of the earth's mantle, below the lithosphere, in which there
is relatively low resistance to plastic flow and convection is thought to
occur
Pangaea
hypothetical continent including all the landmass of the earth prior to
the Triassic period when it split into Laurasia
hypothetical continent including all the landmass of the earth prior to
the Triassic period when it split into Laurasia
Plate tectonics
structure of the earth's crust and many associated phenomena
as resulting from
the interaction of rigid lithospheric plates that move
slowly over the
underlying mantle
structure of the earth's crust and many associated phenomena
as resulting from
the interaction of rigid lithospheric plates that move
slowly over the
underlying mantle
Continental Drift
movement of the continents across the earth's surface
movement of the continents across the earth's surface