The White Mountains themselves are a volcanic complex formed by tertiary volcanism associated with the uplift of the Colorado Plateau. Recently (geologically speaking), alpine glaciers formed at the peaks of the ranges, flowing downward on four separate occasions. We drove around the area and saw an extensive cinder cone field near the White Mountains as well as a nice view from the Rim of the Colorado Plateau. We also hiked a bit through the mountains, where we convinced ourselves we saw glacial and rockslide features. Topics included rockslides, glacial erosion and deposition, periglacial processes, history of glaciers in the area and the world, and global climate change, both cyclical and not.
Along the way, we went through some other interesting terrains, like metamorphic core complex mountain ranges, the Salt River Canyon, and the Morenci open-pit copper mines. We also got some great views of spheroidal weathering: in progress at a road cut and the final product in Texas Canyon. Our campfire stories were the history of the Apache Nation and a long, drawn-out argument about the scientific value of UFO research.
|Spectacular spheroidal weathering in Texas Canyon, just down the road from The Thing?|
|A typical view of the LPL van posse.|
|Learning about copper and listening to pennies drop at the Morenci open-pit mine. Eric Wegryn has a copper mining in Arizona page and lots more pictures of this mine.|
As the Colorado Plateau uplifted, volcanism was widespread along the rim where crustal thinning and crack formation occurred. This is part of one of the cinder-cone volcanic fields near the White Mountains.
|Dave Kring hikes along the beautiful trail to Mt. Baldy.|
|The Mogollian Rim is the high cliff that separates the pine-forested Colorado Plateau from the desert below. Cynthia, Barb, and Zibi try to keep warm in a rock crevice while learning about the mechanics of Plateau uplift.|
|The Salt River Canyon and some funky rock folding in it.|
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