Igneous Rock Identification Chart
Igneous Rock Identification Chart. Drag the rock name to the correct rock. Rocks that are rich in silica usually contain considerable quartz and light-colored feldspar.
Rocks rich in magnesium (Mg) and iron (Fe) tend to contain olivine, pyroxene, amphibole, and biotite. Peridotite is the plutonic rock beneath the Earth's crust located in the upper part of the mantle. Chemical Composition Cooling Type of Grain Intrusive or Extrusive Dominant Minerals Accessory The flow chart moves from left to right, following the arrows.
Rocks rich in magnesium (Mg) and iron (Fe) tend to contain olivine, pyroxene, amphibole, and biotite.
Time: This activity is designed to last at least two class periods.
Magma can cool on the Earth's surface, where it has erupted from a volcano (extrusive rock) or under the Earth's surface, where it has intruded older rocks (intrusive rock).. Diorite, by definition, contains very little quartz. Please note that you can expand this image to fill the screen by clicking on the blue arrows on the right side of the diagram.
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