An Ancient Magma Flood Offers Clues About Global Warming

Roughly 60 million years ago, circulation changes deep within our planet generated a hot current of rock—the Iceland plume—causing it to rise from the heart of Earth’s mantle. When the mantle rock pierced the bottom of the North Atlantic Ocean, lava spurted across Scotland, Ireland and Greenland, scabbing into spectacular columned landscapes like the Giant’s […]