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Crossword Puzzle Geology

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Across
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A region of numerous, closely spaced faults
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Any activity that includes the movement of magma toward or onto earths surface
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vent or fissure in earths surface through which magma and gases are expelled
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An instrument that records vibrations in the ground
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A long mountain chain under the sea; creates new sea floor
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Liquid rock produced under the earths surface
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The solid, plastic layer of the mantle beneath the lithosphere
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The theory that explains how large pieces of the lithosphere, called plates, move and change shape
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An area on earths surface where no direct seismic waves from a particular earthquake can be detected
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The boundary between tectonic plates that are colliding
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Magma that flows onto earth's surface
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a seismic wave that travels through the body of a medium
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The boundary between tectonic plates that are moving away from each other
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The solid, outer layer of Earth that consists of the crust and the rigid upper part of the mantle
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The hypothesis that all continents formed on the same land mass, broke up, and drifted to their present states
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The point on earth's surface directly above the focus
Down
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Describes magma or igneous rock that is rich in feldspar and silica and that is generally light in color
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A seismic wave that travels along the surface; the one we feel
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The boundary between tectonic plates that are sliding past each other horizontally
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The sudden return of elastically deformed rock to its undeformed shape
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A tracing of earthquake motion that is recorded by a seismograph
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The process by which new sea floor forms as magma rises to Earth's surface and solidifies at a mid-ocean ridge
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The study of the alignment of magnetic minerals in rock, specifically as it relates tot he reversal of Earth's magnetic poles
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A large, circular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink
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Primary wave; the first and fastest wave traveling from an earthquake
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The amount of damaged caused by an earthquake
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Describes magma or igneous rock that is rich in magnesium and iron nd that is generally dark in color
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A volcanically active area of earths surface, commonly far from a tectonic plate boundary
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The location in earth along a fault at which the first motion of an earthquake occurs
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Secondary wave; the slower wave