Phacoliths

Diagram illustrating the formation of phacoliths (shown in solid black). A phacolith is an intrusion of liquid rock formed when magma pushes up from deep within the earth into any cracks or spaces it can find.

Keywords

diagram, formation, phacolith, intrusion, magma, pluton

Galleries

Structural Geology

Source

Amadeus W. Grabau A Textbook of Geology (Boston: D.C. Heath & Co., 1920) 202

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