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Andesite: Quiz


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Question 1:
What type is thing is Andesite?
Dinner Theatre

Question 2: The name andesite is derived from the ________ mountain range.
Physical geographyGran ChacoAndesGeography

Question 3: Hydration melting of ________ and fractional crystallization
PeridotiteIgneous rockKomatiiteBasalt

Question 4: The ________ assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende.

Question 5: Melting of a ________ slab containing sediments
SubductionConvergent boundaryVolcanic arcMid-ocean ridge

Question 6: Andesitic ________ in island arc regions (i.e., active oceanic margins) comes from the interplay of the subducting plate and the mantle wedge, the wedge-shaped region above the subducting plate.
MagmaBasaltIgneous rockGranite

Question 7: ________, zircon, apatite, ilmenite, biotite, and garnet are common accessory minerals.

Question 8: Andesites are characteristic of subduction zones, such as the western margin of ________.
Latin AmericaSouth AmericaAmericasNorth America

Question 9: On its way to the surface, the melt stalls and cools, enabling the fractional crystallization of ________ poor minerals, thus raising the silica content of the remaining melt and resulting in andesitic magma.
QuartzOpalAmethystSilicon dioxide

Question 10: Magma mixing between felsic rhyolitic and mafic ________ magmas in an intermediate reservoir prior to emplacement or eruption.
Igneous rockLavaFlood basaltBasalt


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