Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.

In a state with more national ... State Park owes much of its existence to volcanic eruptions millions of years ago. The park boundaries contain the remnants of two ancient cinder cone volcanoes ...

This rugged landscape features cinder cones, spatter cones and lava tube caves formed from volcanic activity in the Great Rift ... to Interior Secretary Zinke's decision today to remove Craters of the ...