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Scoria (cinder) cones

Barker, Daniel S. (2009-03)

Lava domes

Barker, Daniel S. (2009-03)

Pahoehoe, aa, and blocky lavas

Barker, Daniel S. (2009-03)

Joints in igneous rocks

Barker, Daniel S. (2009-03)

Viscous lava flows

Barker, Daniel S. (2009-03)

Pyroclastic flows and surges

Barker, Daniel S. (2009-03)

Carbonatites

Barker, Daniel S. (2009-07)

Hydrothermal activity

Barker, Daniel S. (2009-03)

Ash, lapilli, blocks and bombs

Barker, Daniel S. (2009-03)

Stratovolcanoes

Barker, Daniel S. (2009-03)

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