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Igneous rocks are volcanic rocks. They are formed when lava/magma dries. Examples of igneous rocks are pumice, obsidian, and granite.

Sedimentary rocks are rocks formed when layers of sediment are compacted under immense pressure to form a rock. An example is sandstone.

Metamorphic rocks are any rock (igneous, sedimentary, or even metamorphic), is subjected to immense heat and pressure. This causes the rock itself to change to a new rock. Examples are marble and shale.

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Related Questions

How are rocks classified put in groups?

Rocks are classified into three main groups based on how they are formed: igneous rocks (formed from the cooling of molten rock), sedimentary rocks (formed from the accumulation and cementation of sediment particles), and metamorphic rocks (formed from the alteration of existing rocks under high heat and pressure). Each group has various subcategories based on specific characteristics and composition.


Briefly tell how each three are formed?

the three type of rocks forces of AIR.


What are the three kinds of rocks tell how each formed?

Igneous, metamorphic, and sedimentary are the three types of rocks. Sedimentary is formed when layer of mud or silt build up gradually. Igneous is formed when molten magma cools. Metamorphic is formed when a type of rock changes to another type


How many different types of rock are there?

There are three main types of rock: igneous, sedimentary, and metamorphic. Each type forms through different processes, such as cooling and solidification for igneous rocks, deposition and lithification for sedimentary rocks, and heat and pressure for metamorphic rocks.


How are rocks classified into one of these three groups?

Rocks are classified into three groups based on how they are formed. Igneous rock is formed when magma cools and crystallizes. Sedimentary rock is formed when the products of weathering and erosion are compacted and cemented to form new rock. Metamorphic rock is formed when existing rock is changed by heat, pressure or chemical change into a new kind of rock.


How are each of the major types of rocks formed?

Igneous rocks are formed from magma or lava cooling and hardening. Sedimentary rocks are formed from sediments being compressed and cemented together. Metamorphic rocks are rocks that are changed by extreme heat and pressure.


What are three types of rock formations explain how each of the three is formed?

the three rocks are igneous ,metamorphic and sedimentary i don't know what it is made up of but that is what i trying to figure out can someone help me please


Are rocks classified by origin?

Rocks are classified based on their origin, composition, and texture. The three main types of rocks are igneous (formed from cooling magma or lava), sedimentary (formed from the accumulation of sediments), and metamorphic (formed from existing rocks that undergo change due to heat and pressure). Each type of rock has unique characteristics that help geologists understand Earth's history and processes.


What different types of rock are there?

The three main types of rock are igneous (formed from cooled magma or lava), sedimentary (formed from compressed sediment), and metamorphic (formed from existing rock that has been subjected to heat and pressure). Each type has unique characteristics and formation processes.


If A school has 18 classes with 35 students in each class In order to reduce class size to 30 How many classes must be formed?

A school has 18 classes with 35 students in each class. In order to reduce class size to 30, how many new classes must be formed?


A school has 18 classes with 35 students in each class. in order to reduce class size to 30how many new classes need to be formed?

A school has 18 classes with 35 students in each class. In order to reduce class size to 30, how many new classes must be formed?


How are the three major rocks are different?

Each of the rocks form in a different way.