The Santa Clara volcanic field is volcanic area north of St. George in SW Utah, which has been active since abaout 4 million years ago. It contains numerous cinder cones and lava flows. The Santa Clara lava flow was erupted from 2 young cider cones above Snow Canyon about 10-20,000 years ago and is one of the youngest lava flows in the Colorado Plateau/Basin and Range region. The almost unvegetated lava flow extends 16 km to the south down Snow Canyon, excavated through rocks of the colorful Navajo Sandstone.