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When rock is subject to extreme pressure grains will squish in the y plane of the pressure. It is composed primarily of hornblende amphibole and plagioclase usually with very little quartz the specimen shown above is about two inches five centimeters across. Metamorphic Rocks Questions What Are …

The specimen shown above is a chlorite schist because it contains a significant amount of chlorite. It is caused by shearing forces pressures pushing different sections of the rock in different directions or differential pressure higher. Physical Geology Metamorphic Rocks Foliated Rocks And Non …