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Authors Susan S. Priest, W. A. Duffield, N. R. Riggs, Brian Poturalski, Karen Malis-Clark, James W. Hendley, Peter Stauffer ...

Most volcanoes, loud and pushing, build their cinder cones openly of fiery ash and lava. But a few volcanoes work under cover. Their molten lava never reaches the surface, but quietly pushes up the ...

Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

VOLCANIC LEGACY SCENIC BYWAY, Ore. — Quartzite mountains. Pumice plains. Cinder cones. Volcanoes are the geology that shaped the Pacific Northwest — and there’s an easy way to view them on an ...