Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called
When many layers of thin, runny lava build up a high, level area, the result is a
When ash, cinders, and bombs build up in a steep pile around a volcano's vent, the result is a
The depression or indent at the top of a volcano is called the ____.
Below the crust the magma is stored in the
Lava flow reaches the surface through the
Mt. St. Helens is what type of volcanic mountain?
Hot spots form what kind of volcanoes
Before lava reaches the surface, the molten material is called
A major volcanic belt known as the _________________________ circles the Pacific Ocean.
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