Volcanic Chasm, Vatnajökull Glacier, Iceland, 1997

A column of hissing steam emerges from a gaping 600-foot (180-meter) chasm in Iceland’s Vatnajökull Glacier. Scalding magma transforms water, pooled at the bottom of this abyss, into billowing steam. In 1996, two weeks after an enormous volcanic eruption beneath the ice cap, billions of gallons of meltwater gushed from a glacial lake, causing Iceland’s worst deluge in 60 years.

(Photo shot on assignment for, but not published in, "Iceland’s Trial by Fire," May 1997, National Geographic magazine)

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