Intrusion in geology refers to:

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Multiple Choice

Intrusion in geology refers to:

Explanation:
Intrusion refers to magma moving into pre-existing rocks and cooling underground to form igneous rock. This process creates bodies like dikes (cutting across layers), sills (paralleling layering), and large plutons or batholiths when magma crystallizes deep in the crust. If the magma reaches the surface, it erupts as lava, but intrusion itself happens below ground. Sediments deposited in layers describe sedimentary deposition, not intrusion. Erosion by wind only describes removal of material, not magma movement. Fossil formation involves burial and biological processes, not magma intrusion.

Intrusion refers to magma moving into pre-existing rocks and cooling underground to form igneous rock. This process creates bodies like dikes (cutting across layers), sills (paralleling layering), and large plutons or batholiths when magma crystallizes deep in the crust. If the magma reaches the surface, it erupts as lava, but intrusion itself happens below ground.

Sediments deposited in layers describe sedimentary deposition, not intrusion. Erosion by wind only describes removal of material, not magma movement. Fossil formation involves burial and biological processes, not magma intrusion.

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