Geological Joshua Tree National Park

Rock formation in Joshua Tree National Park.Th...

Rock formation in Joshua Tree National Park.The rocks that look as balls are called giant marbles.

Joshua Tree National Park, in geological terms, as well as sheer “wow” factor, has many of the most interesting displays found anywhere in the deserts of California. Many of these rugged rock formations were formed more than 100 million years ago by magma cooling beneath the surface of the Earth. Erosion by the groundwater in Joshua Tree National Park (it doesn’t rain very often, but when it does it often comes down by the bucket full) is responsible for creating many of the spheres, from original rectangular rocks.

Joshua Tree National Park really is a giant desert mosaic, beautiful, complex and amazing.

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