Xenolith in granitic intrusion
Detailed Description
A basalt xenolith imbedded in granodiorite in the Lost Palms Oasis area. The basalt xenolith is probably a piece of the roof rock that the igneous pluton migrated upward into as it formed in Mesozoic time. Basalt xenoliths are common in granitic intrusions throughout the park.
Sources/Usage
Public Domain.