Laccolith
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A laccolith is a body of intrusive rock with a dome-shaped upper surface and a level base, fed by a conduit from below. A laccolith forms when magma rising through the Earth's crust begins to spread o
Idealized laccolith shape
Dolerite intrusion laccolith in Sydney, Australia
Laccolith exposed by erosion of overlying strata in Montana
Pink monzonite laccolith intrudes within the grey Cambrian and Ordovician strata near Notch Peak, Utah
Henry Mountains
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The Henry Mountains is a mountain range located in the southeastern portion of the U.S. state of Utah that runs in a generally north-south direction, extending over a distance of about 30 miles. They
Laccolith
…the solidified laccolith, which is typically more resistant to weathering than the host rock. The exposed laccolith then forms a hill or mountain. The Henry Mountains of Utah, US, are an example of a mountain range composed of exposed laccoliths. It was here that geologist Grove Karl Gilbert carried out pioneering…
Peaks in the Henry Mountains viewed from a high mountain road
The Henry Mountains dominate the center of this view, a lower-resolution, cropped image from the Image Science & Analysis Laboratory, NASA Johnson Space Center. Lake Powell and the Colorado River are to the south, and the Waterpocket Fold is to the west.
Mt. Pennell as seen from Lake Powell.