in fact even though biological races do not exist the concept of race obviously is still a reality as is racism these are prevalent and persistent elements of our everyday lives and generally accepted aspects of our culture thus the concept of human races is real
Common Metamorphic Minerals Metamorphic rocks form when pre-existing rocks (igneous, sedimentary, or metamorphic) are exposed to high temperatures and pressures under the Earth's surface. Some pre-existing minerals, unstable at the higher temperature and pressure conditions, transform into new minerals.Others recrystallize and grow larger.etamorphic rocks tend to be dominated by minerals you already know: feldspar, quartz, muscovite, biotite, amphibole, and calcite/dolomite. However, a few minerals are found exclusively or mainly in metamorphic rocks:
The way that they form. Non-foliated metamorphic rocks form at low pressures but high temperatures, while foliated metamorphic rocks form at high pressures. Most non-foliated metamorphic rocks are generally formed by contact metamorphism and are termed âHornfelsâ. There are a few metamorphic rocks that form under pressure with little obvious foliation, such as marble or quartzite, however these are generally mono-mineralic rocks.