Whether it's rivers cutting through earth, lava melting through rock, or water slicing through ice, channels all twist and ...
The tallest volcano in Europe, Italy's Mount Etna, and the world's most active volcano, Kilauea in Hawaii, erupting again.
What we see as Isle Royale and the Keweenaw Peninsula is actually part of the one of the largest known lava flows on Earth. A map of the different forms of rock found throughout the Greenstone Flow.
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