How can the cold regions of Alaska have volcanoes?
Seething upsets in the earth seem out of place in the frozen north. But there are many fiery volcanoes on the arctic islands, and there are countless steamy hot springs in iceland. And a few years ago Alaska was shaken by a disastrous earthquake. Earthquakes are related to volcanoes, hot springs and flowing rivers of molten lava. All these dramatic events are children of growing mountains. A huge range of massive mountains takes millions of years to grow to its full size. It grows up and up, lifting the rocky layers of the earth’s crust high above sea level. The range may rise inch by inch for centuries, but as it grows huge blocks of the earth’s crust are pushed and shoved out of place. Deep below ground level there are stresses and strains and the buried layers become crushed and heated. The thick sandwich of rocky layers becomes unbalanced. Suddenly something must give way, and there is a shuddering upset perhaps ant earthquake. A mountains’ roots are deep in the ground. The earthqu
