Formed by the collapse of the Mount Mazama volcanoes approximately 6, 850 years ago, this caldera (crater) lake is located in Oregon.

这座位于美国俄勒冈州(Oregon)的火山湖是大约6 850年前马扎玛火山(Mount Mazama)坍塌形成的。

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Crater Lake in southwestern Oregon of the United States lies in the crater of an extinct volcano.

美国俄勒冈州西南部的火山口湖，在一座死火山口上。

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Crater Lake in southwestern Oregon of the United States was formed in a depression that covers the top of a dead volcano.

美国俄勒冈西南边的火山口湖，是在一个地坑中形成的。这个地坑覆盖在一座死火山的顶部。

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