Put on your 3D
glasses and see the gallery of igneous structures.
1. Shield volcanoes erupt in the form of lava flows like the one shown here.
2. Lava flows like this one vary in thickness from a few inches to many feet.
3. Lava often flows beneath the shield volcano to the site of eruption through lava tubes like this one.
4. When basaltic lava is erupted into ocean water, it forms round structures like these pillow basalts.
5. Cinder cones like the ones shown here are small, violent volcanoes.
6. Composite volcanoes like Mt. St. Helens alternate between violent and quiet eruptions.
7. Composite volcanoes like this one are common in subduction zones.
8. Composite volcanoes can often erupt violently, like Mt. St. Helens shown here. The entire top and side of the original volcano was blown off leaving the small dome shown here.
9. Geysers like the ones shown here are common in areas around active igneous areas.
