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Glomeroporphyritic pillow basalt
Spatter vent & cone
Flattened pillows
Pillow lavas
 
Porphyritic andesite
Columnar joints in basalt
Basaltic breccia
Eutaxitic structure
 
Ash beds
Pumic blocks in tuff
Folds in reo-ignimbrite
Pillow basalt
 
Parasitic cone Shastina
Radial columnar joints around fumarole-Bishop tuff
Zoned tuff
Andesitic lavas & breccias
 
Blasted trees
St Helens crater
Margin of 1980 pyroclastic flow at St. Helens
Plinian deposits & pyroclastic flow deposits
 
Plinian deposits & pyroclastic flow deposits
Thermal ponds
Tongariro volcanoes
Plinian deposits beneath pyroclastic flows
 
Halemaumau crater
Stratovolcano - Mt. Fuji
Tongariro volcanic crater
Glowing window in fresh lava
 
Puu Ou and active lava lake
Spatter cone
Aa flows
Active pahoehoe flows
 
Armoured bomb
Columnar jointed basalt
Spherulites in dacite
Active pahoehoe lava
 
Puu Ou and active lava lake
Active lava lake
Active lava lake
Active lava lake
 
Overturned pillow basalts
Volcanoes & craters
Acid hot springs
Pahoehoe tongues
 
Pillow basalts
Sulfer sublimates at sulfatara
Base surge beds at maar crater