Among the oldest mountains in the world, the Appalachian chain is now relatively low but visually striking.
Published Jan 7, 2013
An astronaut captured this view of the Front Range, the San Juan Mountains, and the Sangre de Cristo Mountains.
Published Jan 12, 2020
Acquired November 13, 2002, this false-color image shows part of the Ouachita Mountains in southeastern Oklahoma.
Published Oct 24, 2010
Acquired February 23, 2010, this true-color images shows snow cover stretching from northern Arizona to South Dakota under largely cloud-free skies.
Published Feb 24, 2010
The Colorado Plateau of Arizona, Colorado, New Mexico, and Utah 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. Navajo Mountain in southeastern Utah is a dome-shaped chunk of igneous rock that intruded into the sedimentary layers and lifted up the overlying layer. Navajo Mountain is one of several of these rock formations, called laccolith by geologists, in southeastern Utah’s portion of the Plateau. This oblique (from-the-side) astronaut photograph highlights Navajo Mountain in the center of the image, surrounded by light red-brown Navajo Sandstone (also visible in the canyon at bottom of the image). The igneous rock at the core of the mountain is wrapped in sedimentary layers. The peak of Navajo Mountain, at approximately 3,148 meters (10,388 feet) elevation, is comprised of uplifted Dakota Sandstone deposited during the Cretaceous Period (approximately 66-138 million years ago).
Published Oct 31, 2005
An underground mass of volcanic rock may have caused the Appalachian Mountains to bend in Pennsylvania.
Published Sep 18, 2014
