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Metamorphic Rock

Metamorphic rocks are formed from other types of rocks. The original rock is exposed to conditions such as heat or pressure. Carbon turning to diamonds while under extreme pressure is an example of a metamorphic rock.

653 Questions

How is the rock Beryl formed?

Beryl rock is one of the most colorful crysyallized rocks ranging in many textures and shapes ;i have some at home.Yor best bet is to go to www.mineralgallery.co.za/beryl/htm

What are the two most common non-foliated metamorphic rocks?

The two most common non-foliated metamorphic rocks are marble, formed from the metamorphism of limestone, and quartzite, formed from the metamorphism of quartz sandstone.

What rock forms from heated and squeezed rock is it gneiss?

yes if you get a fourth grade paper and its called marvelous makeovers the answere is yes

Why do some minerals only occur in metamorphic rocks?

As the degree of hydration decreases in a rock undergoing metamorphosis, certain minerals cannot exist. New minerals then form that do not require water for their formation. This environment of heat, pressure, and lack of water is necessary for the formation of certain minerals.

Which statement is true about a metamorphic rock that was exposed to stress equally from all directions?

If the rock was exposed to pressure equally from all directions, then it will likely not show foliation

What metamorphic rocks form sandstone?

The most common metamorphic rock associated with the regional, contact, or depth of burial metamorphosis of sandstone is quartzite.

How non-foliated metamorphic rocks are formed?

Nonfoliated rocks are produced mainly by contact metamorphism, or heat from cooling magma. Contact heat generally results in a finer recrystallization of the parent rock, so little foliation is visible. Quartzite is typically a tough, hard, light-colored rock in which all the sand grains of a sandstone or siltstone have recrystallized into a fabric of interlocking quartz grains. Marble is a softer, more brittle rock in which the dolomite or calcite of the limestone parent rock has recrystallized. Hornfels is a common metamorphic rock formed when basalt or shale is exposed to heat from magma.

The lustre of marble?

Marble is a rock that can take a highly polished lustre - especially black or white veined marble.

Are sedimentary rocks similar to metamorphic rocks?

Sedimentary rocks are ones formed by solidified mud and loose earth. Metamorphic rocks are ones formed by some sort of change, such as melting and re-cooling. So they are similar in some senses (they are both rocks, both of the earth) but in others they are very different (physical properties).

Is metamorphic rock banded and foliated?

Metamorphic rock can be banded and foliated. Banded metamorphic rock has visible layers or bands of different mineral compositions, while foliated metamorphic rock has a layered or sheet-like appearance due to the alignment of minerals. These patterns are a result of the intense heat and pressure the rock undergoes during metamorphism.

Where is Calacatta marble from?

Calacatta marble is from the Carrara region of Italy

Can metamorphic rocks be metamorphosed?

Yes they can, the mineral assemblage in a metamorphic rock reflects and equilibrium state pertaining to the temperatures and pressures to which it has been subject. If the rock is subsequently taken to a different Pressure/temperature environment, an new equilibrium mineral phase will start to develop.

Why diatomaceous earth is classified as an organic metamorphic rock even though it is practically pure silicon dioxide SiO2?

The answer lies in the name. Diatomaceous earth is fromed from diatoms, microscopic algae with shells of silicon dioxide.

What two things change a sedimentary rock into a metamorphic rock?

What two thing's change a sedimentary rock into a metamorphic rock