Mitten Butte. View of Mitten Butte, a typical butte temoin in Monument Valley, Arizona. A butte temoin (usually simply called butte) is an erosion feature of large sedimentary rock plains. It is formed when a resistive cap-rock is found. The sedimentary rocks around the cap-rock are more easily eroded, leaving a tower-like edifice standing after millions of years. The slopes at the bottom of the butte are composed of debris from subsequent weathering.
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