1. Shield Volcanoes: These volcanoes are characterized by their wide, gently sloping sides. They are formed by the eruption of very fluid, basaltic lava, which spreads out over a large area. Examples include Mauna Loa in Hawaii and Kilauea.

2. Cinder Cone Volcanoes: These volcanoes are smaller and steeper than shield volcanoes. They are formed by the eruption of pyroclastic material (ash, cinders, and bombs), which builds up around the vent. Examples include Parícutin in Mexico and Sunset Crater in Arizona.

3. Composite Volcanoes (Stratovolcanoes): These volcanoes are the most common type and are characterized by their cone-shaped form and alternating layers of lava and ash. They are formed by explosive eruptions of viscous lava and ash. Examples include Mount Fuji in Japan and Mount Vesuvius in Italy.