When ash, cinders, and bombs build up in a steep pile around a volcano's vent, the result is a

When groundwater heated by magma rises to the surface and collects in a natural pool, it is called a

The huge hole left by the collapse of a volcanic mountain is called a

Several kilometers froma volcano, a geologist observes an old lava flow made up of dark-colored basalt rock. The geologist infers that the lava must have had

When many layers of thin, runny lava build up a high, level aera, the result is a

What triggers the small earthquakes that occur around a volcano before an eruption?

When magma hardens in a volcano's pipe, the result will eventually be a landform called a

Pahoehoe is

What is the landform that forms when a mass of hardened magma is uplifted, causing the layers of rock to bend upward?

If a volcano's magma is high in silica, the volcano will probably

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