4_Igneous_Processes[1]

4_Igneous_Processes[1] - Igneous Processes the rock cycle...

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1 Igneous Processes the rock cycle source of all igneous rocks? MAGMA from crust or upper mantle
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2 Formation of Igneous Rocks Extrusive – magma to lava (surface) which cools and solidifies courtesy C. Carscallen
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3 courtesy C. Carscallen courtesy C. Carscallen courtesy C. Carscallen
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4 courtesy C. Carscallen courtesy C. Carscallen Formation of Igneous Rocks Extrusive – pyroclastic material ejected, deposited, compacted (e.g. ash layers, tuff)
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5 frozen lava flow compacted ash deposi compacted ash deposit deposit frozen lava flow Formation of Igneous Rocks Intrusive – magma penetrates crust from depth
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6 Formation of Igneous Rocks Intrusive – magma cools in place beneath the Earth’s surface cools Formation of Igneous Rocks • Intrusive rocks we see at surface have been exposed by weathering with time and weathering
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7 intrusive igneous rocks exposed at surface
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8 Controls on Magma Properties • Temperature (typic. ~1000 C) – The reason magma/lava retains heat so well is
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4_Igneous_Processes[1] - Igneous Processes the rock cycle...

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