1. Shield Volcanoes:
* Shape: Broad, gently sloping cones with a wide base.
* Lava Type: Very fluid, low-viscosity basaltic lava that spreads out over large distances.
* Examples: Mauna Loa and Kilauea in Hawaii.
2. Composite Volcanoes (Stratovolcanoes):
* Shape: Tall, cone-shaped mountains with steep sides and a symmetrical profile.
* Lava Type: More viscous, often andesitic lava that flows shorter distances, alternating with layers of ash and rock.
* Examples: Mount Fuji in Japan, Mount Vesuvius in Italy, Mount Rainier in Washington.
3. Cinder Cone Volcanoes:
* Shape: Small, steep-sided cones with a crater at the summit.
* Lava Type: Erupted as cinders and ash, which build up around the vent.
* Examples: Paricutin in Mexico, Sunset Crater in Arizona.
4. Lava Domes:
* Shape: Rounded, dome-like structures that form when viscous lava pushes up from the vent.
* Lava Type: Highly viscous, rhyolitic lava that does not flow far.
* Examples: Lassen Peak in California, Mount St. Helens after its 1980 eruption.
5. Caldera Volcanoes:
* Shape: Large, circular depressions that are formed when a volcano collapses after a massive eruption.
* Formation: The eruption empties the magma chamber beneath the volcano, causing the ground above to collapse.
* Examples: Crater Lake in Oregon, Yellowstone National Park in Wyoming.
6. Submarine Volcanoes:
* Shape: A variety of shapes, but often similar to shield volcanoes or cinder cones.
* Location: Underwater, but may sometimes rise above the surface.
* Examples: Loihi Seamount near Hawaii.
It's important to note that these are just a few of the common shapes of volcanoes. There are many other less common forms, and some volcanoes can have features of multiple types.
