DescriptionPhoenix-Deer Valley Rock Art Center- Hedgepath Hills and Sonoron Desert.JPG
English: View of the Hedgepath Hills and Sonoron Desert from he Deer Valley Rock Art Center in Phoenix, Arizona. The rocks in the Hedge Hills were formed in the Pliocene era when lava squeezed up through fissures in the earth. This type of volcanic rock is called basalt. National Register of Historic Places ref: 84000718
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{{Information |Description = View of the Hedgepath Hills and Sonoron Desert from he Deer Valley Rock Art Center in Phoenix, Arizona. The rocks in the Hedge Hills were formed in the Pliocene era when lava squeezed up through fissures in the earth. T...
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