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Rhyolite: Quiz
  
  

Question 1: Rhyolite can be considered as the extrusive equivalent to the plutonic ________ rock, and consequently, outcrops of rhyolite may bear a resemblance to granite.
BasaltGraniteFelsicIgneous rock

Question 2:
What type is thing is Rhyolite?
Igneous
First-class
Architectural
credit

Question 3: The mineral assemblage is usually quartz, alkali ________ and plagioclase (in a ratio > 1:2 — see the QAPF diagram).
FeldsparOrthoclaseSilicate mineralsAnorthite

Question 4: It may have any texture from ________ to aphanitic to porphyritic.
MACORCranberry glassGlassBorosilicate glass

Question 5: They can also occur as ________ or in volcanic plugs and dikes.
Impact eventImpact craterMeteoriteBreccia

Question 6: Rhyolite is an igneous, volcanic (extrusive) rock, of felsic (________-rich) composition (typically > 69% SiO2 — see the TAS classification).
QuartzOpalAmethystSilicon dioxide

Question 7: Many eruptions of rhyolite are highly explosive and the deposits may consist of fallout tephra or of ________.
LavaVolcanoTuffIgnimbrite

Question 8: Due to their high content of silica and low iron and magnesium contents, rhyolite melts are highly polymerized and form highly viscous ________.
Igneous rockLavaVolcanoBasalt

Question 9: This page is about a volcanic rock. For the ghost town see ________, and for the satellite system, see Rhyolite/Aquacade.
Funeral MountainsRhyolite, NevadaAmargosa RiverDeath Valley National Park

Question 10: Rhyolites that cool too quickly to grow crystals form a natural glass or vitrophyre, also called ________.
GarnetGoldQuartzObsidian
















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