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1-1 Faulted rhyolitic obsidian from Hrafntinnuhryggur, Krafla, Iceland, 25 ka. 1-2 Andesitic peperite, Honister, Cumbria, ~450 Ma. 1-3 Mule Creek pyroclastic breccia with lithic clasts, New Mexico, 19 Ma 1-4 Sheared crystalline dacite lava, Unzen lava spine, Unzen, Japan, 1994 1-5 Trachyandesitic ash, Eyjafjallajokull, April 2010 1-6 Rhyolitic peperite from Torfajokull, Iceland, 70 ka 1-7 Andesite lava from Montserrat, West Indies with tuffisite vein 1-8 Andesite lava bomb with breadcrust textures from Montserrat, West Indies 2-1 Bezymianny (andesitic lava dome, Kamchatka) 2004 2-2 Hrafntinnuhryggur obsidian with fractured crystalline flow bands (rhyolite, 25 ka) 2-3 Hrafntinnuhryggur obsidian with spherulites and lithophysae (rhyolite, 25 ka) 2-4 Tip of basaltic dyke (raefajkull, Iceland) (age unknown) 2-5 Ropy pahoehoe from Gaesafjoll, Iceland (basaltic,