In ____________, the recrystallization is not limited to quartz, and feldspars begin to occur. With quartz, they form continuous beds of light-colored minerals separated from layers of phyllosilicates.

Which is a metamorphic process?A.ErosionB.MeltingC.RecrystallizationD.Lithification

Which process changes the grain size of a metamorphic rock?A.FoliationB.CompactionC.RecrystallizationD.Lithification

Mineral growth in magmas at the surface with temperatures around 800 to 1,300°C occurs in the following wayMultiple ChoiceIron and magnesium will link up with aluminum and the silicon-oxygen tetrahedron as magma temperature decreases to sequentially form four distinct and discontinuous families of minerals—olivine, pyroxene, amphibole, and biotite mica.Calcium will combine with aluminum and the silicon-oxygen tetrahedron to begin forming the plagioclase feldspar family, a continuous and gradational series of minerals.Both of these are correct.None of these choices are correct.

Match each term with its best description.RecrystallizationCompactionFoliationBurial metamorphism?Grains move closer together?Parallel alignment of platy grains?Grains take on a larger size?When a rock changes because of surrounding pressure

Metamorphic rocks form by:Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer.aCrystallization from magma.bFragments of pre-existing rocks, minerals, and fossils "glued" together by steam.cChemical and textural alteration of pre-existing rocks due to high temperature and pressure, and possibly the exchange of fluids.dMetamorphosis of caterpillars to butterflies.eNone of the above