What are the three main types of rocks?

There are three main types of rocks: igneous, sedimentary, and metamorphic.

Igneous rocks are formed from solidified lava or magma. This type of rock is formed when magma cools and solidifies, either above or below the earth's surface. Examples of igneous rocks include granite and basalt.

Sedimentary rocks are formed by the accumulation and cementation of small particles, such as sand, shells, and mud. This type of rock is formed over time through the process of weathering, erosion, deposition, and lithification. Examples of sedimentary rocks include sandstone, limestone, and shale.

Metamorphic rocks are formed by the alteration of pre-existing rocks through heat, pressure, and chemical processes. This type of rock is formed when existing rocks are subjected to high temperatures and pressures, causing them to change their form and composition. Examples of metamorphic rocks include marble and slate.

There are three main types of rocks: igneous, sedimentary, and metamorphic.

• Igneous rocks are formed when molten rock (magma or lava) cools and solidifies. They are the most common type of rock on Earth.
• Sedimentary rocks are formed from the accumulation of sediments, which are small pieces of rock, minerals, and organic matter. Sediments are transported by wind, water, or ice and then deposited in layers. Over time, the sediments are compacted and cemented together to form sedimentary rocks.
• Metamorphic rocks are formed when existing rocks are changed by heat, pressure, or chemical reactions. Metamorphic rocks can be formed from igneous, sedimentary, or other metamorphic rocks.

The three types of rocks are constantly being recycled through the rock cycle. The rock cycle is a model that describes how rocks are formed, changed, and destroyed over time.

Here is a diagram of the rock cycle:

[Image of the rock cycle]

The rock cycle is a continuous process that has been going on for billions of years. It is responsible for the formation of all the rocks on Earth.