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:
Thus, of the eight common igneous minerals, only quartz, K-feldspar, and muscovite are commonly seen in sedimentary rocks. These minerals are joined in sedimentary rocks by clay minerals, calcite, dolomite, gypsum, and halite. The clay minerals form during mineral weathering.The other four minerals are salts that precipitate as water evaporates. The elemental constituents of these salts are ultimately also derived from mineral weathering.yrite is not a rock-forming mineral, but it is commonly present in sedimentary rocks that formed in or near seawater (oceans, lagoons, and coastal swamps). Quartz, Chert, and Flint K-Feldspar Muscovite and Clay Minerals Calcite/ Dolomite Gypsum Halite Pyrite Go back to Common Minerals page Return to Home Page.