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Plate Tectonics

TermDefinition
Plate Tectonics a theory explaining the structure of the earth's crust and many associated occurrences as resulting from the interaction of rigid plates which creep over the mantle.
Alfred Wegener Alfred Wegener was polar researcher, geophysicist and meteorologist
Pangea Pangaea or Pangaea was a super continent that existed during the late Paleozoic and early Mesozoic eras
Crust The Earth's crust is a thin shell on the outside of the Earth, accounting for less than 1% of Earth's volume
Lithosphere the rigid outer part of the earth, consisting of the crust and upper mantle.
Asthenosphere the rigid outer part of the earth, consisting of the crust and upper mantle.
Transform Boundary Transform boundaries are places where plates slide sideways past each other.
Sea Floor Spreading the formation of new areas of oceanic crust, which occurs through the rise of magma at midocean ridges and its subsequent outward movement on either side.
Convergent Boundary A convergent plate boundary is a location where two tectonic plates are moving toward each other, often causing one plate to slide below the other
Divergent Boundary a linear feature that exists between two tectonic plates that are moving away from each other
Rift Valley a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems.
Subduction the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
Convection Current a current in a fluid that results from convection.
Continental Drift Theory Continental drift was a theory that explained how continents moved on Earth's surface.
Trench a long, narrow ditch.
Ocean Basin an oceanic basin may be anywhere on Earth that is covered by seawater but geologically ocean basins are large geologic basins that are below sea level.
Hot Spot Hot spots are places within the mantle where rocks melt to generate magma.
Mid-Ocean ridge A mid-ocean ridge is a seafloor mountain system formed by plate tectonics
Ring of fire The Ring of Fire is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur.
Created by: 6439313592
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