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Unit 3 Vocab, Colin

TermDefinition
Asthenosphere weak and ductile region of the upper mantle
Subduction where one plate moves under another and is forced to sink
Seafloor spreading oceanic crust is formed from volcanic activity
Mantle convection very slow motion of Earth's mantle
Ridge push gravity causing a plate to slide away from a high ridge
Slab pull motion of a tectonic plate caused by subduction
Lava molten rock
Magma molten natural material
Tectonic plate A massive slab of rock
Theory of continental drift Earth's continents have moved over time
Convergent boundary When tectonic plates collide with each other
Divergent boundary When two tectonic plates split from each other
Transform boundary When tectonic plates slide past but against each other
Hot spot Volcanic regions
Epicenter point in the crust wher a seismic rupture begins
Focus where an earthquake begins
Pangaea a super continent
Geo hazard geological state that may lead to damage or risk.
Reverse fault break in the Earth's crust, where older rocks are pushed above younger rocks
Strike-slip fault fractures where the blocks have mostly moved horizontally
Fault Fracture
Compression stress directed toward the center of a rock
Tension stress which stretches rocks in two opposite directions
Shearing study of structural geology
Felsic igneous rocks that are rich with elements
Mafic igneous rock that is rich with magnesium and iron
Created by: Moonsobright
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