Molten rock a.
- beneath the Earth’s surface b.
- magma that extrudes onto the surface of the Earth i.
- (pa-hoy-hoy)- freely flowing lava that forms a thin skin with wrinkles and then looks like twisted rope when solid ii.
- (ah-ah)- rough, jagged surface with dangerously sharp edges Different types of Cones a.
-built by a steady supply of very fluid basaltic lava. Have a broad, gently sloping cone that resembles a shield. i.
Mauna Loa in Hawaii- largest volcano on earth b.
-very steep, but not high, formed from explosive eruptions c.
from a single vent. i.
Sunset Crater- Arizona ii.
- (Stratovolcano) erupts both lava and ash with a steep summit and gently sloping sides i.
Erupts explosively ii.
Mt. Vesuvius, Mount Pele Mnt. St Helens, Mt. Pinatubo
- formed at the central vent of an erupting volcano. Increase in size during eruptions i.
-very large crater > 5km in diameter 1.
Yellowstone National Park- a.
Remnant of a volcano that erupted 600,000 yrs ago. i.
Hot springs, bubbling mud, steaming pools, geysers