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Intrusive is a term that applies to igneous rocks that form from magma underground such as granite.

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Velda Hauck

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1y ago
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8y ago

Intrusion is a geological term. Sometimes magma from deep in the Earth forces its way up through faults in existing layers of rock and sets as a thin seam. This new layer of igneous rock is called an intrusion. If it is basically horizontal it is called a sill, whilst a vertical one is called a dyke.

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10y ago

An intrusion can be either the act of intruding (an intrusion into his private life) or a thing that intrudes (the excavations were an intrusion on their heritage).

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7y ago

In science terms it is a term to describe Igneous Rocks that have solidified from magma underground. Extrusive is the same thing but it is when the rock solidified above ground.

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9y ago

Intrusive means tending to intrude, to butt in, to join a group unwantedly.

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Q: What is an intrusion in science terms?
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