page_title: Navajo Mountain
section_title: Geologic history
hierarchical_section_title: Navajo Mountain / Geologic history
caption_attribution_description: English: Astronaut's satellite photo of Navajo Mountain and environs. Located in southeast Utah (left-south slope in Arizona). San Juan River goosenecks in upper right, Lake Powell at top. In the physiographic Canyon Lands Section.
context_page_description: Navajo Mountain is a peak in San Juan County, Utah, with its southern flank extending into Coconino County, Arizona. It holds an important place in the traditions of three local Native American tribes. The summit is the highest area on the Navajo Nation.
context_section_description: Navajo Mountain is a prominent free-standing laccolith, a dome-shaped body of igneous rock that intruded into sedimentary layers and lifted up the overlying layer. The igneous rock at the core of the mountain is wrapped in sedimentary layers. Such igneous intrusions have been exposed by erosion and well studied in similar mountain ranges on the Colorado Plateau, such as the Henry Mountains, the Abajo Mountains, and the La Sal Range.
  The Colorado Plateau is made of mostly flat-lying layers of sedimentary rock that record paleoclimate extremes ranging from oceans to widespread deserts over the last 1.8 billion years. The peak of Navajo Mountain, at approximately 10,388 feet (3,166 m), is made up of uplifted Dakota Sandstone deposited during the Cretaceous Period (approximately 66-138 million years ago).
caption: Navajo Mountain from space
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