They're also called composite volcanoes. Mount Rainier in Washington is a famous stratovolcano. Shield volcanoes are big, broad volcanoes made up of oozy lava flows that erupt from multiple vents.

When a volcano erupts there can be lava, ash, steam or gaseous emissions. Sometimes eruptions are explosive and lava is thrown out as volcanic bombs. Hotspots are places where the magma rises up ...

The canyon features some of the deepest sections ... Pavonis Mons and Arsia Mons The Tharsis Volcanoes are a group of ...

Magma is the name given to molten material inside the earth (volcano) whereas lava is the name given to molten material which is often ejected from a volcano and then cools and solidifies.