ClipArt ETC
Section of Corndon Hill, in Shropshire, England; the type of the phacolith.

Corndon Hill

Section of Corndon Hill, in Shropshire, England; the type of the phacolith.

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.

Phacoliths

Diagram illustrating the formation of phacoliths (shown in solid black). A phacolith is an intrusion…