Advanced Igneous Challenge

Rocks & Minerals Challenge Game

Rock Identification by Picture and Attribute

Explorers! Before you begin your journey, you need to recognize geological specimens.

Begin by selecting one of the specimens pictured.

Metamorphic

Igneous

Sedimentary

Name: Rhyolite	Alternate Specimen(s) Fichter, Lynn S. James Madison University
Classification: Igneous	Texture/Color: aphanitic/ most often pink

	Minerals Present: quartz, othoclase, muscovite, biotite, plagioclase, amphibole
	Intrusive or Extrusive? Extrusive
About this rock: Silica-rich lava. Rhyolite is most often found in volcanoes from continental interiors and some subduction zone volcanoes.

Igneous

Sedimentary