1. Three Types of Volcanoes

2. Shield Volcanoes Low silica level Low viscosity Lava-thinner
High or low levels of gas
Flattened mound
Resembles a warrior’s shield

3. Mauna Loa, Hawaii

4. Piton de la Fournaise

5. Surtsey, Finland

6. Composite Volcanoes High in silica High viscosity magma
High levels of gas
Highly explosive
Cone shaped
Formed by layers of lava and ash

7. Mt. Rainier, Washington

8. Mt. Fuji, Japan

9. Mt. St. Helens, Washington

10. Cindercones Low silica lava High levels of gas
“Fire-fountain” eruptions
Commonly found on the
flanks of shield volcanoes
Made from a pile of rock pieces
Structurally weak

11. Pu'u ka Pele, Hawaii (on the flanks of Mauna Loa)

12. Floreana Island, Galapagos

13. Puu OO, Hawaii

14. Aa
lava that is thick and sharp

15. Pahoehoe:
lava that forms thin crust and wrinkles

16. Pillow lava
lava that erupts under water, has a round shape

17. Blocky lava
cooler, lava that does not travel far from eruption, jagged when it dries.