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Chapter 10 review

Chapter 10 review, buckle down and get set

TermDefinition
Mid-ocean ridge A long, undersea mountain chain that has steep, narrow valley at the center, that forms as magma rises from the Asthenosphere and creates new oceanic lithosphere, as plates move
Sea-floor spreading The process by which new oceanic lithosphere forms as magma rises to earth surface and solidifys to a mid-ocean ridge
Paleomagnetism The study of alignment of magnetic minerals in rocks, specifically as it relates to the reversal of earths magnetic poles, and the magnetic properties rock gained
Plate tectonics The theory that explains how large pieces of the lithosphere, called plates, move and change shape
Lithosphere The solid, outer layer of earth that consists of the crust and the rigid upper part of the mantle
Asthenosphere The solid, plastic layer of the mantle beneath the lithosphere, made if mantle rock that flows very slowly, which allows tectonic plates to move on top of it
Divergent boundary The boundary between tectonic plates that are moving away from eachother
Convergent boundary The boundary between tectonic plates that are colliding
Transform boundary The boundary between tectonic plates that are sliding by eachother horizontally
Rifting The process by which earths crust breaks apart, can occur continental crust or oceanic crust
Terrane A piece of lithosphere that has a unique geologic history and that may be part of a larger piece of lithosphere, such as a continent
Supercontinent cycle The process by which supercontinents form and break apart over millions of years
Pangea The super continent that formed 300million years ago and that began to break up 250 million years ago
Panthalassa The single, large ocean that covered earths surface during the time of the super continent Pangea existed
Ridge push Ridge push force is a discussed mechanism for plate motion in plate tectonics. Because mid-ocean ridges are at a higher elevation than the rest of the ocean floor, gravity causes the ridge to push on the lithosphere that recedes farther from the ridge.
Slab pull Slab pull is the bit of motion of a tectonic plate that can be accounted for by its subduction. Plate motion is partly driven by the weight of cold, dense plates sinking into the mantle at trenches.
Mesozoic era Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic, and the Cretaceous.
Rift a crack, split, or break in something.
Oceanic crust the relatively thin part of the earth's crust that underlies the ocean basins. It is geologically young compared with the continental
Continental crust The continental crust is the layer of igneous, sedimentary, and metamorphic rocks that forms the continents and the areas of shallow seabed close to their shores, known as continental shelves.
Geological history
Created by: Thedarkmessiah