Metamorphic Rock

because a metamorphic rock is made up of different rocks.

There are types of igneous rocks that are hard (eg granite) and others that are soft (eg volcanic ash).

There are types of metamorphic rocks that are hard (eg gneiss) and others that are soft (eg marble).

Thus "hardness" is not a characteristic that can be used to distinguish between the two.

Both gneiss and migmatite are late-stage, high grade metamorphic rocks.

During a mountain building phase, the sedimentary rocks may be buried deeply and subjected to heat and pressure causing certain minerals to form which were not present in the original rock.

Also, an igneous intrusion may cause adjoining sediments to be altered in a contact metamorphism leading minerals such as garnets to form.

quartzite is made from quartz. in the case of metamorphic rocks, quartzite is made from regional metamorphism. in the process of regional metamorphism, pressure is applied making the rock hard and dense.

Schists are metamorphic rocks with parallel alignment of minerals.

Igneous rock is formed when molten rock cools. Examples are lava from volcanoes cooling but also rock that is pushed from the magma layer into cooler pockets under the surface of the Earth. They are characterised by having crystals in them. The larger the crystal the longer it took to cool down and form a solid.

Sedimentary rocks are formed when small particles (sediments from weathering and erosion) are deposited at a particular site - usually the slow running bits of river. These particles are, over millions of years, pushed together so much that any water in between the particles is pushed out and the particles get cemented together. A typical characteristic of sedimentary rock is that if you scratch it the particles will be scraped off and that they absorb water. They can also contain fossils.

Metamorphic rock is formed when sedimentary, igneous or other metamorphic rock ends up, because of plate movement, in a position where it is exposed to high pressure and temperature. This changes the nature of the original rock into something new. Characteristics of metamorphic rock is that there are no crystals or visible grains, it doesn't absorb water and is quite hard.

Detrital sedimentary are classified according to the size and shape of their sediments.

It varies some metamorphic rocks are fine grained (eg slate) and others have very large crystals (eg an augen gneiss).

They are both rocks.

Sedimentary can contain metamorphic rocks.

and vice versa.

Quartzite is a metamorphic rock formed from sandstone. The process involves heat and pressure altering the sandstone's mineral composition, causing quartz grains to recrystallize and fuse together, resulting in a harder, more durable rock. Quartzite is known for its smooth texture, high resistance to weathering, and distinctive white color.

All rock types, igneous, sedimentary, and even metamorphic can be altered to new metamorphic rock.

a metamorphic rock is a rock that has been changed from one rock to another by heat and/or pressure.....they amount of layers would depend on what kind of rock.....all rocks have a different amount of layers

sorry

Gneiss is a metamorphic rock formed when intense heat and/or pressure is applied to it's parent rock schist.

there are several ways such as heat & pressure, melting, chemical weathering, compression, compaction & cementation, but it depends on the kind of rock it is for what process it has to go through.

-Cutegirl99

'' the properties of the metamorphic rock quartzite depend on the properties of its parent rock, sandstone. Some sandstone are made almost entirely of quartz sand grains. Quartzite consists largely of quartz crystal. Under heat and pressure, the spaces between the sandstone's grains are filled, and the rock recrystallizes into quartzite. '' - Page 135, Chapter 6 Rocks (EARTH SCIENCE).

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.

Marble has a hardness of around 3-4 on the Mohs scale, which measures the hardness of minerals. This means that marble is a relatively soft stone compared to others.

By a process of melting and re-solidification of the melt produced..

Marble can contain small gas bubbles, typically trapped during the formation process when the stone was still in a molten state. These gas bubbles can give marble a speckled or cloudy appearance, adding to its unique character.

Burial metamorphism differs from regional and contact metamorphism in that it is the result of rocks being buried deeper into the earth's crust through tectonic movements.

Gneiss does not easily break into flat sheets, so it is ill-suited for making tiles.

A metamorphic or Igneous rock

no