Igneous rock

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10 Terms

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Intrusive igneous rock

Magma solidifies in earths crust

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Extrusive igneous rocks

Igneous rock hardens on earth

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What is intrusive activity

Magma solidifies underground after a mass of magma doesnt reach the surface

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<p>1.</p>

1.

Batholith- mass of magma pushes upward and solidifies under earths surface, exposed by weathering

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<p>2.</p>

2.

Laccolith- magma intrudes on old layers of sedimentary rock that are roughly horizontal, pushes rock upwards

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<p>3.</p>

3.

Sill- magma spreads horizontal between layers

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<p>4.</p>

4.

Dyke- wall like cuts vertically across existing rock layers

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<p>5.</p>

5.

Lopolith- sedimentary layers cannot support weight lower layer subsides

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