Geography

igneous rock
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Terms in this set (23)
igneous rock
a type of rock that forms from the cooling of molten rock at or below the surface
metamorphic rock
A type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions.
sedimentary rock
A type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
Pacific ring of fire
Major earthquake zone that forms a ring around the pacific ocean
Epicenter
Point on Earth's surface directly above an earthquake's focus
focus
The point beneath Earth's surface where rock breaks under stress and causes an earthquake
anticline fold
An upward fold of rock's layers
syncline fold
a downward fold of rock's layers
fault
A break in the earth's crust
convection current
a current caused by the rising of heated fluid and sinking of cooled fluid
geothermal energyEnergy from steam or hot water produced from hot or molten underground rocks.Constructive plate boundaryPlates that move away from each otherConservative plate boundaryTectonic plate margin where two tectonic plates slide past each other.Destructive plate boundaryPlates that move towards each otherMagmamolten rockLavaMagma that reaches Earth's surfaceactive volcanoa volcano that is erupting or has shown signs that it may erupt in the near futuredormant volcanoA volcano that has not erupted for a long time, but may erupt again one day.extinct volcanoA volcano that has not erupted for thousands of years and probably will not erupt again.shaft miningmethod of excavating a vertical or near-vertical tunnel from the top down, where there is initially no access to the bottomQuarryingremoving loosened blocks from the bed of a channel during times of high flow ratesoreRock that contains a metal or economically useful mineralSome base metals areIron, lead and zinc