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Under a blue sky dotted with white, fluffy clouds, the variegated, grayish mass of the Pine Valley Mountains rise above red-and-buff outcrops of the Early Jurassic (~180 million year old) Navajo Sandstone, which themselves rise above greenish, scrub-covered slopes of the older Kayenta (~195 million year old) and Moenave (~200 million year old) formations. The low, nearer shelf of sandstone below the Navajo is the Springdale Sandstone Member of the Moenave Formation, famous for having produced silver ore at Silver Reef, Utah (a few miles north (right) in the photo) in the late 1800s.