Introduction Igneous rock is formed as a result of the Earth’s internal “engine,” while sedimentary rock formation depends on external climate and conditions. Metamorphic rock, however, takes place after these rock types have already formed. It ...
Temperature Temperature increases in sedimentary layers that are found deeper and deeper within the Earth. The deeper the layers are buried, the more the temperature rises. The great weight of these layers also causes an increase in pressure, ...
Burial Metamorphism When layers of sedimentary rock become heavier and heavier, they get pushed further down into the crust, where they heat up and take on the temperature of the surrounding rock. We learned that when this happens, digenesis ...
Pressure There are three main factors that cause pressure increases and the formation of metamorphic rocks. These are: the huge weight of overlying sedimentary ...
Index Minerals A Scottish geologist, George Barrow, noticed that rocks having the same overall mineral make up (like shale) could be seen to go through a series of transformations throughout specific zones in a metamorphic region. He found ...