Magma
Magma
Magma
Pressure and temperature increase with depth beneath the surface of the Earth.
metarmhorphic rock
heat and pressure beneath Earth's surface can change a rock into metamorphic rock.
Heat and pressure deep beneath Earth's surface can change any rock into metamorphic rock
heat and pressure in the earths crust with little if any chemical change.
Metamorphic rock
A volcano is Earth's safety valve, it lets out pressure that has built up beneath the surface of the Earth.
As depth beneath the Earth's surface increases, both temperature and pressure increase. This is due to the weight of the overlying rock and the Earth's internal heat. The increase in pressure and temperature with depth is known as the geothermal gradient.
Magma is formed as a result of very high and intense pressure beneath the surface of the earth that leads to the melting of the rock.
There are many ways to change and form it but the most common way the rock get the pressure and heat it needs to change and form is when the rock is beneath the Earth's surface (near the mantle where it's hot) and receive the pressure from all the rock layers above it.