Download Summary up to quiz 2

Geol 107
Review guide for Exam 2
Volcano features (magma, lava, chamber, conduit, vent, fumarole)
Three ways to melt the asthenosphere and locations of volcanoes
Igneous rocks (intrusive vs. extrusive): cooling time and crystal size
Magma composition (SiO2 %) and rock types
Magma evolution (fractional crystallization, crustal assimilation, effects on composition & density)
- Bowen’s reaction series
Magma ascent (density contrasts, F.C., bubble formation)
Effusive vs. explosive eruptions
- Viscosity (controls, bubbles and eruption style) and landforms
- Effusive products (a’a, pahoehoe)
- Explosive products (pyroclasts (tephra) size, eruption column and cloud, airfall)
o pyroclastic flows (two types (column collapse, dome collapse))
Volcanic landforms (shield, cinder cones, stratovolcanoes, domes, calderas, maars, tuff rings)
- landforms: rock types and eruption style
Lahars (sources of tephra and water)
Volcanic landslides: causes, hummocks, examples
Eruption styles: relations between rock type, viscosity, explosivity
hawaiian, strombolian, vulcanian, plinian, ultraplinian, peléean, surtseyan
Tectonic setting (diagram) and: magma composition, landforms
Quiz #2
(Historic examples will not be on exam#2)