Volcanism

 3 types of Volcanos on Earth:  Composite volcanos or Stratovolcanos Mt. Fuji, Japan

Volcanism  3 types of Volcanos on Earth:  Composite volcanos or Stratovolcanos 2008 eruption of the Chaiten volcano, Chile. Credit: ALVARO VIDAL/AFP/Getty Images

Volcanism  3 types of Volcanos on Earth:  Shield Volcanos Mauna Kea, Hawaii

Volcanism  3 types of Volcanos on Earth:  Shield Volcanos 1994 eruption of Krafla volcano, Iceland. Credit: USGS

Volcanism  3 types of Volcanos on Earth:  Cinder Cones SP Cinder Cone, Arizona

Volcanism  3 types of Volcanos on Earth:  Cinder Cones Cerro Negro volcano, Nicaragua, November Credit: USGS

Volcanism  Different magma types can be classified by their silica content: SiO2 CONTENT MAGMA TYPE VOLCANIC ROCK ~50% Mafic Basalt ~60% Intermediate Andesite ~65% Felsic (low Si) Dacite ~70% Felsic (high Si) Rhyolite

Volcanism  Stratovolcanos  Form at convergent plate boundaries

Volcanism  Stratovolcanos  Form at convergent plate boundaries

Volcanism  Shield Volcanos  Form at divergent plate boundaries (rift zones) and at hot spots

Volcanism  Shield Volcanos  Form at divergent plate boundaries (rift zones) and at hot spots

Volcanism  Cinder Cones  Form on the flanks of larger volcanos or on their own

Volcanism  What kind of volcano is Olympus Mons?

Volcanism  What kind of volcano is Olympus Mons?

Volcanism  Other Martian volcanos… Uranius Tholus Ceraunius Tholus

Volcanism  Other Martian volcanos…