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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Physics » Rock cycle

Rock cycle

In this article we will learn about the rock cycle, about the rock, types of rock and more.

Table of Content
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The Rock Cycle is a process of forming and changing various types of rocks. The rocks alternate between three varieties on a regular basis. Any type of rock may be transformed into another sort of rock. James Hutton is credited with the notion of the rock cycle. The movement, change and motions of rocks are all part of the rock cycle. The rock cycle is a never-ending cycle with no beginning or finish. The rock cycle is a never-ending cycle that never stops. The rock cycle encompasses all of the changes that occur in the life of rocks. It has a significant influence on our daily lives since rocks are quite helpful. We will study everything we can about the rock cycle and rocks in this post, which will help us understand it better.

Rocks

A rock is a naturally created and non-living earth. Mineral grains are collected to make them. All of the mineral grains are firmly bonded together, however rocks varied from mine. Mineral granules, which can be little or large, make up rocks. They are made up of a combination of minerals. Their texture makes them clearly identifiable.

The rock cycle

We’ve learnt about the three main sorts of rocks. We must now understand the rock cycle. The rock cycle is a cyclic process that involves the transformation of one rock into another. An igneous rock can be transformed into a sedimentary rock, as well as a metamorphic rock. It’s merely a fundamental notion that’s used to describe things like how rocks are connected to one another, how the earth works, and how rocks change into something else. When rocks are forced down beneath the earth’s surface, they may melt into lava.  If the circumstances for the magma to remain liquid are no longer present, the rock will harden into an igneous rock. When a rock is subjected to high temperatures and pressures, it can change physically or chemically, resulting in the formation of a new rock, which is known as metamorphic. Furthermore, rocks that are exposed to the atmosphere are unstable and vulnerable to weathering and erosion. This process breaks down the original rock into tiny bits while also transporting dissolved components away.

 

 

           Rock Cycle

 

 

The Rock Cycle Process

The cycle has no beginning and no finish. These are a few things to think about:

Erosion and Weathering

Temperature affects weathering; it occurs when the rocks freeze due to a reduction in temperature. One of the reasons for weathering is a rise in temperature.

 The boulders are broken solid into the sand like microscopic particles during erosion. The presence of agents is the only distinction between weathering and erosion.

Deposition and Transportation

The transportation process occurs when eroded rock particles are transported away by wind, rain, seas, rivers, and streams. As rivers run into the ocean or get deeper, rock particles begin to sink as the stream slows, forming a sediment layer. They frequently begin to pile up more quickly, forcing rivers to split into many channels.

Compaction

It can be below or above the water as sediment layers build up. After the sediments have stacked, they begin to form strata. These layers are quickly covered by another layer, and the process continues. The sediments eventually convert into rocks over a period of time.

Crystallization

Inside volcanoes, magma, the liquid form of rocks, remains dormant. When it is subjected to pressure and warmth as a result of heat emanating from the earth’s core. Depending on conditions such as temperature and the amount of gas dissolved, the magma might be less viscous or sticky. The less viscous erupts and generates fine-grained rocks, whereas the sticky erupts and makes solid rocks.

Melting

It’s the other end of the cycle. The temperature and pressure begin to rise as the rocks reach the earth’s core. As a result of this, the rocks begin to melt. It swells and erupts into lava. Some rocks erupted just to cool off, but others erupted and changed their features, allowing new types of rocks to develop.

Metamorphism and Deformation

Sedimentary and igneous rocks are subjected to extreme pressure as a result of the abrupt motions and pressure. Deformation refers to the folding and faulting of rocks. Metamorphism is the transformation of igneous and sedimentary materials into metamorphic rocks.

Rocks of many types

Three primary groups of rocks may be identified. They are as follows:

🡺Igneous rocks are a kind of igneous rock that is

🡺Sedimentary rocks are a kind of sedimentary rock.

🡺Metamorphic rocks are rocks that have undergone a transformation.

Igneous Rocks are a type of igneous rock that is formed

One of the most common forms of rocks is igneous. Volcanoes generate them, and when the volcano erupts, magma spews forth. When magma crystallises and hardens into igneous rock, it is referred to as molten rock. There are two subtypes of igneous rocks:

When magma is confined deep within the earth, it creates intrusive igneous rocks. Gabbro, granite, peridotite, and diorite are examples of intrusive igneous rocks.

Extrusive igneous rocks: extrusive rocks are formed when magma cools and escapes above or near the earth’s surface. Obsidian, rhyolite, pumice, and basalt are among examples.

Sedimentary rocks     are rocks that have been deposited throughout time.

Sedimentary rocks are generated by the accumulation of existing hazards on the earth’s surface. Sedimentary rocks are formed from sediments transported downstream by rivers. Following that, sediments are dumped in lakes and seas. After being buried and consolidated to create a rock, the sediments lose water. These rocks can be classified into four categories:

 

Clastic sedimentary is made up of cemented clasts, grains, and solid particles. Sandstone, siltstone, shale, and conglomerate are among examples.

 minerals are precipitated from aqueous solutions directly. Chert, iron ore, rock, salt, and other minerals are examples.

Biochemical sedimentary rocks: biochemical sedimentary rocks are formed of shells or consist entirely of shells. Examples include limestone, coal, and charts, among others.

Organic sedimentary rocks are made up of relict plants and other creatures that are rich in carbon. Chalk, coal, diatomite, and other minerals are examples.

Rocks that have undergone metamorphism

Existing rocks are metamorphosed into new ones to create metamorphic rocks. Metamorphism is a term used to describe the process of converting rocks into new ones. They are generated when magma from the interior of the earth heats the rock and causes it to soften. Metamorphic rocks are divided into two categories:

Metamorphic rocks with foliated layers: these rocks contain layers that can be thick or thin. When the pressure and tension are in the same direction, these rocks develop. Slate, phyllite, and other minerals are examples.

Consolidated rocks vary from foliated rocks in that they are not foliated. When the temperature is high but the pressure is low, they develop. Marble, greenstone, quartzite, and other similar materials are examples.

Conclusion

The Rock Cycle is a series of transitions. Igneous rock can be metamorphosed into sedimentary or metamorphic rock. Sedimentary rocks can metamorphose into metamorphic or igneous rocks. Igneous or sedimentary rock can form from metamorphic rock. Three primary groups of rocks may be identified. 

 
faq

Frequently asked questions

Get answers to the most common queries related to the IIT JEE Examination Preparation.

What is Magma, exactly?

Ans: Magma is a liquid that exists under the earth’s surface. Lava is a hot liquid tha...Read full

What is the Rock Cycle, what does it entail?

Ans: The rock cycle is the process through which one type of ...Read full

What are igneous rocks, exactly?

Ans: Igneous rocks are formed when heated molten rock solidif...Read full

Ans: Magma is a liquid that exists under the earth’s surface. Lava is a hot liquid that forms as magma flows beneath the surface. A heated liquid base, minerals, solid rocks, and dissolved gas make up magma, which is a rock combination. Pressure, temperatures, mineral composition, and water content are the most important aspects of magma. Melt, volatiles, and solids are the three components of magma.

Ans: The rock cycle is the process through which one type of rock transforms into another. This process is repeatable. The igneous rocks are formed when heated lava cools down. Igneous rocks are then broken down into little fragments. They are carried downstream by rivers and seas after breaking.

Ans: Igneous rocks are formed when heated molten rock solidifies and crystallises. They are often generated by volcanoes, which erupt and spit hot molten rock, which is known as magma. It melts deep beneath the earth’s surface along plate boundaries and comes to the surface. The major rocks are typically referred to as such. They’re separated into two categories.

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