An intrusion is any body of intrusive igneous rock, formed from magma that cools and solidifies within the crust of the planet.

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Wikipedia contributors. (2023, August 28). Intrusive rock. In Wikipedia, The Free Encyclopedia. Retrieved October 29, 2023, from https://en.wikipedia.org/w/index.php?title=Intrusive_rock&oldid=1172656316

intrusion of

intrusive rock

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United States Department of Transportation (Wikimedia) The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the president of the United States and is a member of the president’s Cabinet.

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Intrusive rock (Wikipedia) Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions, such as batholiths, dikes, sills, laccoliths, and volcanic necks.

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Intrusive rocks are characterized by large crystal sizes, and as the individual crystals are visible, the rock is called phaneritic.

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