Great depth means great heat and pressure.
Gneiss is more likely to form at great depths where mountains are being pushed up. This is because gneiss forms through the process of high-grade metamorphism, which requires high pressures and temperatures found at greater depths in the Earth's crust. As mountains are pushed up, rocks are brought to these depths and subjected to the conditions needed for gneiss formation.
The bending and buckling of rocks under great force produces a fold.
At depths of about 50 to 200 km below Earth's surface Rocks melt at depths at 50 and 200 km below the Earth's surface.
Metamorphic rocks form deep under the Earth's surface because the high pressures and temperatures required for the transformation of existing rocks into metamorphic rocks are typically found at greater depths. These conditions are usually created by tectonic forces or by the burial of rocks under layers of sediment.
Metamorphic rock is formed from another kind of rock under great heat and pressure. This process alters the mineral composition and texture of the original rock, creating a new type of rock. Examples of metamorphic rocks include marble, schist, and gneiss.
under depths of water
At varying depths under the surface.
Rocks produced at great depths are typically metamorphic or igneous rocks. Metamorphic rocks form from existing rocks that undergo changes in temperature and pressure, while igneous rocks form from the cooling and solidification of molten material. These processes occur deep within the Earth's crust or mantle.
At some depths you will get water. At some depths you will get hot rocks. All depends on location.
Gneiss is more likely to form at great depths where mountains are being pushed up. This is because gneiss forms through the process of high-grade metamorphism, which requires high pressures and temperatures found at greater depths in the Earth's crust. As mountains are pushed up, rocks are brought to these depths and subjected to the conditions needed for gneiss formation.
The bending and buckling of rocks under great force produces a fold.
a fault
I'm not sure if you question has been translated, or just poorly worded - for my answer I will assume that the question is "How is it possible to determine whether an igneous rock was formed at great depths or shallow depths?"Igneous rock can be basically translated as 'fire rock'...ie, molten stone that has taken form as it cooled. Cooling at shallow depths, or on the surface, such as magma that has come from a volcano and cools at the surface is often rapid - which (in general) makes for a softer stone, often with air pockets visible in it, such as pumice or scoria. Magma that cools far below the surface usually cools much slower, and often under pressure, so it tends to make for a much denser, less pock marked stone, such as granite - rocks that cool slower and under pressure also tend to have a more crystaline structure, rather than the granular structure that is more common in surface cooled rocks.
Becausethey are under a great pressure under the Earth's surface.
At depths of about 50 to 200 km below Earth's surface Rocks melt at depths at 50 and 200 km below the Earth's surface.
Sedimentary rocks change under great pressure and temperature condition to form metamorphic rocks
Metamorphic rocks form deep under the Earth's surface because the high pressures and temperatures required for the transformation of existing rocks into metamorphic rocks are typically found at greater depths. These conditions are usually created by tectonic forces or by the burial of rocks under layers of sediment.