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Ubehebe Crater : ウィキペディア英語版 | Ubehebe Crater
Ubehebe Crater is a large volcanic crater of the Ubehebe Craters volcanic field in the northern half of Death Valley, in Death Valley National Park, California, USA. ==Geography== Ubehebe Crater (pronounced YOO-bee-HEE-bee) is located at the north tip of the Cottonwood Mountains. The crater is half a mile (one kilometer) wide and 500 to 777 feet (150 to 237 m) deep. The age of the crater is estimated from 2,000 to 7,000 years old.〔Native American artifacts in the area indicate that 6,000 years is the most likely age although estimates of 2,000 years are common.〕 In 2012, new evidence suggested that the crater may be as young as 800 years old, although this estimation was a lower bound, and it's still possible the crater is much older than that.〔(Death Valley's Big Bang: Volcano "Potentially Active" ), National Geographic, January 25, 2012〕〔(Ubehebe Crater: Possibly Younger but No Imminent Danger of an Eruption ), Wired, January 24, 2012〕〔(In Death Valley, ancient volcano gives scientists a surprise ), Christian Science Monitor, January 24, 2012〕
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