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
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.
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
Henry Mountains
…mm) at the highest elevations. The geology of these mountains was first studied in 1875-1876 by Grove Karl Gilbert. He coined the term "laccolite" (now laccolith) to describe the characteristic shapes of some of the igneous intrusions that core the mountains. The main type of igneous rock is porphyritic diorite…
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