7 Written questions
6 Multiple choice questions
- <50% SiO2, very fluid, non-explosive, quiet, low viscosity, divergent associated with oceanic crust.
- >50% SiO2, gooey, highly viscous, becomes explosive, convergent system associated with continental crust formation.
- plates moving away from eachother
- Canadian Shield, Rocky Mtns, Appalachian Mtns, Central TX
- building materials, ores
6 True/False questions
When solidified, magma chamber becomes a __ composed of granite and/or diorite. → batholith
What is extrusive? → lava
What is intrusive? → lava
Silicic rocks process via __. → magnetic differentiation
Shield volcanoes due to extensive outpouring of __/basaltic lava with little pyroclastic material. → eruptions, lava
Stratovolcanoes form by alternating __ of pyroclastic material (ash) and thick __ flows. → eruptions, lava