Heat and pressure are not metamorphic agents. Heat, pressure, and chemically active fluids are the three main agents of metamorphism that can change the mineral composition and texture of rocks over time.
The three agents of metamorphism are heat, pressure, and chemically active fluids. Heat causes minerals to recrystallize, pressure changes the mineral structure, and chemically active fluids can introduce new elements into the rock.
Metamorphism is the process where existing rocks are changed by heat, pressure, or fluids. This process causes the minerals in the rocks to rearrange and form new crystals, creating metamorphic rocks.
Metamorphic rocks are formed by the process of extreme heat, pressure and other chemicals. Two types of metamorphism are dynamic which makes the pressure and extreme heat and thermal which is caused by the heat of magma from a volcanic eruption.
compaction
metamorphic rocks are formed from sandstone
Types of metamorphism are Contact Metamorphism Regional Metamorphism Cataclastic Metamorphism Hydrothermal Metamorphism Burial Metamorphism Shock Metamorphism (Impact Metamorphism)
heat and pressure
For metamorphism of rock to occur temperature and pressure must increase. Rocks created in this manner are called metamorphic rocks.
Sedimentary rocks must be subjected to high temperature and pressure within the Earth's crust to become metamorphic rocks. This process, known as metamorphism, causes changes in the mineral composition and texture of the sedimentary rock, resulting in the formation of metamorphic rocks.
Sedimentary and Igneous rocks are not metamorphic rocks. Metamorphic rocks however are igneous or sedimentary rocks that have undertaken metamorphism (In extreme heat and/or pressure the minerals are forced to recrystalize) and become metamorphic rocks. If the heat/pressure causes the rock to melt into liquid rock than it is no longer metamorphi, it is igneous. Hope this helps :)
The three agents of metamorphism are heat, pressure, and chemically active fluids. Heat causes recrystallization of minerals, pressure can deform rocks, and chemically active fluids can alter the mineral composition of rocks.