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laccolith

Laccolith

igneous intrusion - Click to enlarge
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Intruded mass of igneous rock that forces apart two strata and forms a round lens-shaped mass many times wider than thick. The overlying layers are often pushed upward to form a dome. A classic development of laccoliths is illustrated in the Henry, La Sal, and Abajo mountains of southeastern Utah, found on the Colorado Plateau.

© RM 2009. Helicon Publishing is division of RM.


 
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