一些地质学家估计，胡德火山在过去的15,000年里经历过大规模的喷发活动。
Geologists estimate, however, that Mt. Hood has experienced bursts of eruptive activity in the past 15, 000 years.
它的形成由于火山作用和冰河时期，胡德雪山是喀斯喀特山脉的一部分，火山带流经太平洋西北部。
Shaped both by volcanism and glaciers, Mt. Hood is part of the Cascade Range, a belt of volcanoes running through the Pacific Northwest.
胡德山是一个成层火山：一个陡峭的园锥形山，由层层堆叠的硬化的熔岩、结块的火山灰和早期喷发是甩出的岩石构成。
stratovolcano: a steep-sloped, conical structure composed of alternating layers of hardened lava, solidified ash, and rocks thrown out by earlier eruptions.
胡德山是一个成层火山：一个陡峭的园锥形山，由层层堆叠的硬化的熔岩、结块的火山灰和早期喷发是甩出的岩石构成。
stratovolcano: a steep-sloped, conical structure composed of alternating layers of hardened lava, solidified ash, and rocks thrown out by earlier eruptions.
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