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Geology

mr davis: mr davis
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Across
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Solid part of center of the earth
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Movement based upon differing temperature
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Forms in a divergent boundary between two oceanic plates
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When physical forces (wind, rain, running water) break down rock
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Non-reversible changes that change a material permanently
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A more accurate date based upon radioactive decay
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Wegener's idea that the continents used to all be connected and had moved apart
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Ancient super continent
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A law of geology that says that an igneous intrusion is younger than the rock it crosses
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part of Interior of earth that exhibits plasticity
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Rocks made from fine particles of rock compacted and cemented together
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A fossil that allows you to identify the age of a rock
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A group of minerals bound together
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Rocks that have undergone extreme pressure and heat
Down
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Occur when two continental plates collide
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Theory that explains the movement of plates
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When half of the radioactive material in a sample has decayed
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Gives you an estimate of age based upon where a layer of rock occurs
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Rocks made from cooled magma
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Changes that do not alter a material
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Occurs between an oceanic plate and a continental plate
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Coming together
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Sliding in opposite directions