English: A caver descends into a cave in a volcanic rift, also known as Crystal Ice Cave on the Great Rift of Idaho. It illustrates another type of lava cave that forms differently than lava tubes.
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{{Information |Description={{en|1=A caver descends into a cave in a volcanic rift, also known as Crystal Ice Cave on the Great Rift of Idaho. It illustrates another type of lava cave that forms differently than lava tubes.}} |Source=Own work by uploader |