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Where do ultramafic rocks form in the Earth's crust?

Ultramafic rocks form in the Earth's crust in the upper mantle, specifically in the mantle portion known as the asthenosphere. These rocks are composed primarily of minerals rich in magnesium and iron, such as olivine and pyroxene. Ultramafic rocks are brought to the Earth's surface through processes like volcanic eruptions or tectonic movements, providing valuable insights into the composition and dynamics of the Earth's interior.


How does the volume of sedimentary rocks in Earth's crust compare with the volume of igneous rocks in the crust?

Sedimentary rocks make up about 75% of Earth's crust by volume, while igneous rocks make up about 15-20%. Sedimentary rocks form through processes like erosion, deposition, and cementation, while igneous rocks form from the cooling of molten magma.


What makes up close to 95 percent of the rocks in the Earth's crust?

silicates


Which type of mineral is the main component of most rocks on earth?

Silicate minerals are the main component of most rocks on Earth. These minerals are made up of silicon and oxygen, and they form the majority of the Earth's crust.


What is the layer of igneoussedimentaryand metamorphic rocks which form the continents and shallow seabed close to the shore?

The layer you are referring to is the Earth's crust, specifically the lithosphere. It is composed of a combination of igneous, sedimentary, and metamorphic rocks and forms the outer shell of the Earth. On continents, the crust is thicker compared to oceanic crust, which is thinner and denser.

Related Questions

What element is abundant in the earth's crust and combines with oxygen to form rocks and minerals?

Silicon is abundant in the Earth's crust and combines with oxygen to form rocks and minerals, such as quartz and feldspar.


What rocks originate from the surface of the earth?

Sedimentary rocks form on the Earth's crust, and can form metamorphic rocks when buried. Igneous rocks form under the surface, or when liquid magma reaches the surface as lava.


What are Igneous rocks that cool quickly beneath Earth's crust called?

Igneous rocks that cool quickly beneath earth's crust are known as intrusive rocks. These rocks will form from magma which will cool and solidify quickly.


Where do ultramafic rocks form in the Earth's crust?

Ultramafic rocks form in the Earth's crust in the upper mantle, specifically in the mantle portion known as the asthenosphere. These rocks are composed primarily of minerals rich in magnesium and iron, such as olivine and pyroxene. Ultramafic rocks are brought to the Earth's surface through processes like volcanic eruptions or tectonic movements, providing valuable insights into the composition and dynamics of the Earth's interior.


Contrast the ways in which extrusive and intrusive rocks are formed?

Intrusive rocks form within the crust of the Earth while extrusive rocks form on the surface.


How did rocks get on earth?

they were and aree forced through earths crust in the form of lava.


What are rocks that form Earth's crust?

The rocks of the crust are igneous, sedimentary, and metamorphic in origin. The base rock of the oceanic crust are mainly basaltic and the base rock of the continental crust is mainly granitic.


Is it true that the Earth's crust is made of rock?

Yes, the Earth's crust is primarily composed of solid rock materials such as granite, basalt, and sedimentary rocks. These rocks form the outermost layer of the Earth's structure.


What earth foces cause metamorphic rocks to form?

Pressure through layers of crust


How does the volume of sedimentary rocks in Earth's crust compare with the volume of igneous rocks in the crust?

Sedimentary rocks make up about 75% of Earth's crust by volume, while igneous rocks make up about 15-20%. Sedimentary rocks form through processes like erosion, deposition, and cementation, while igneous rocks form from the cooling of molten magma.


How are moon rocks similar to and different rocks on earth?

Minerals that make up moon rocks are the same minerals that are found on Earth. Some moon rocks have minerals that combine to form kinds of rocks that are not found on Earth. BlueStar(:


Where do metomorphic rocks form?

Metamorphic rocks form deep underground under high pressure and heat conditions, typically within the Earth's crust. They can also form at plate boundaries where tectonic forces cause rocks to be buried and subjected to these extreme conditions.