What two features can develop in a rock during metamorphism? (C)

Metamorphism refers to the process by which the mineral composition, texture, or chemical composition of rocks change due to changes in temperature and pressure, or interaction with fluids. This process occurs in the solid-state, meaning that it does not involve melting the rock.

The first feature that can develop in a rock during metamorphism is recrystallization. During metamorphism, the existing minerals within the rock may become unstable due to changes in temperature, pressure, or chemical conditions. As a result, these minerals may break down, reform, or grow in size, leading to the development of new crystals. This process of recrystallization can result in a change in the rock's texture and mineral composition.

The second feature that can develop in a rock during metamorphism is foliation. Foliation is the alignment of platy or elongated minerals into parallel planes, giving the rock a banded or layered appearance. This feature develops due to the application of pressure during metamorphism, which causes the minerals to rotate and align themselves perpendicular to the direction of the applied pressure. Rocks with foliation are typically referred to as metamorphic rocks, as the process is indicative of the rock having undergone metamorphism. In conclusion, the two features that can develop in a rock during metamorphism are recrystallization and foliation. These features occur due to the transformation of existing minerals under changing temperature, pressure, or chemical conditions.