Question

what type of metamorphism forms quartz and calcite?
contact metamorphism
hydrothermal metamorphism
regional metamorphism
mechanical metamorphism

Explanation:

Hydrothermal metamorphism involves hot water circulating through rocks. This process can deposit minerals like quartz and calcite in fractures and pores. Contact metamorphism is mainly due to heat from magma, regional metamorphism occurs over large areas due to pressure and temperature, and mechanical metamorphism is about physical deformation. Hydrothermal activity is directly associated with the formation of these minerals through fluid - mineral interactions.

Answer:

Hydrothermal metamorphism