Around the same time, a massive volcanic eruption in the Wrangell Mountains in Alaska occurred, blanketing the area in a layer of ash, up to a foot deep, called the White River tephra.

大致在同一时期，阿拉斯加州的弗兰格尔山脉出现了大规模的火山爆发，这个地区遂被深达一英尺的怀特河火山灰所覆盖。

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A peak, 4,523.5 m (14,831 ft) high, in the Wrangell Mountains of southern Alaska near the British Columbia border.

大熊山：朗格尔山脉中的一个山峰，海拔4,523.5米(14,831英尺)。位于英属哥伦比亚边境附近阿拉斯加州南部。

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A river of eastern and southern Alaska flowing about 764 km (475 mi) from the Wrangell Mountains northwest to the Yukon river.

美国阿拉斯加州东部和南部的一条河流，流程约764公里(475英里)，从兰格尔山脉向西北注入育空河。

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But Wrangell-St Elias National Park is also governed by guidelines set down in 1980, when the park was established.

ECONOMIST: By bulldozer, across a national park