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What is a laccolith?

A body of rock formed from magma migrating and solidifying deep in the subsurface is called a pluton or an igneous intrusion.

A laccolith is a blister-shaped intrusion. See 'Dome Mountain'.

Dome Mountains:
Dome Mountains are formed from hot molten material (magma) rising from the Earth's mantle into the crust that pushes overlying sedimentary rock layers upward to form a 'dome' shape. Unlike a volcano, the magma typically does not reach the Earth's surface. Instead, the magma cools underneath the surface and forms the core of the mountains. Dome mountains in Utah include Navajo Mountain, and the La Sal, Abajo, and Henry Mountains in the southeastern part of the state.

 

Tags: Geomorphology, Volcanoes