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Igneous rocks are formed by a solidified magma. There are hundreds of different minerals that those rocks may comprise. The mineralogy of igneous rocks is defined by their chemical composition and the pressures and temperatures at which they solidified.

Most igneous rocks contain mostly silicates (e.g. quartz, feldspars, mica, pyroxenes, amphiboles, olivine). Sulphides (e.g. pyrite, chalcopyrite, galenite etc.) and titanite, monazite, zircon etc. are common minor components.

Some more exotic igneous rocks known as carbonatites are largely made up of carbonate minerals that crystallized out of a carbonate magma.

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11y ago
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15y ago

Igneous, sedimentary, and metamorphic rocks are all formed in a process known as the Rock Cycle. The basic "theme" of the cycle is that every rock can become every other rock, including itself. With that in mind, we can go through a basic run down of how the cycle works. Start with, say, a pile of sediments. Lets say these sediments get lithified, or cemented, together to create a sedimentary rock. This sedimentary rock lives its life until eventually it encounters a great deal of heat, usually within the earth, that causes it to melt. When this rock melts it becomes magma. Once this magma resurfaces to the earth, it cools, creating an igneous rock. So so far we have sediments that became a sedimentary rock, which melted into magma and then recooled to become igneous. Now this igneous rock lives its life until it comes into contact with a large amount of heat and pressure, again, usually inside the earth. This process creates a metamorphic rock. This rock lives its life until it is slowly weathered and eroded, creating another pile of sediments. Effectively, each rock has become another rock in the cycle. But, again, keep in mind that these rocks can become themselves, meaning that an igneous rock, for example, and re-melt and re-cool to create another igneous rock.

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14y ago

All rocks are made of minerals. Igneous rocks are formed from molten and magma eg. basalt and granite, Sedimentary rocks are mechanically or organically formed eg. sandstone, limestone and shale and Metamorphic rocks are formed from igneous or sedimentary rocks altered by heat or pressure eg. slate and graphite.

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12y ago

An igneous rock is a rock that is made from heat , and the different types of igneous rocks are Obsidian , Granite , Basalt , Pumice and Gabbro.

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15y ago

igneous rocks are formed from the mantle of volcanoes

sedimentary rocks are formed from sediments (little rock fragments)

metamorphic are formed from lava and minerals

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12y ago

heat and pressure

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11y ago

The way in which they were formed.

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Q: Igneous rocks sedimentary rocks metamorphic rocks are made of?
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Related questions

Name the 3 kinds of rocks?

There are three major types of rock: igneous (formed from the cooling and solidification of magma or lava) sedimentary (laid down as sediments) and metamorphic (changed by heat and/or pressure)


Is metamorphic rocks made up of sedimentary rock igneous rock or other metamorphic rocks?

Metamorphic rocks


What type of rock are mountains made of?

Igneous rocks, Sedimentary rocks Metamorphic rocks.


What type of rocks is casper mountain made of?

igneous, sedimentary. and metamorphic


What is one way igneous sedimentary and metamorphic rocks are different?

igneous rocks are made of lava that cools and hardens and metamorphic rocks are madeby heat and pressure.


From what is metamorphic rock made?

Metamorphic rocks are made from the action of heat, stress, and pressure on pre-existing rocks, of either an igneous, or a sedimentary origin. Also, sometimes a metamorphic rock can be resculpted to form another metamorphic rock.


What are three groups of rock called?

Igneous, Sedimentary, Metamorphic. Igneous rocks are made of solidified magma. Sedimentary rocks are those that are made by the weathering or erosion of soil of Earth. Metamorphic rocks are when rocks are changed from one material to another; new minerals are created.


Did the great pyramid was made up of metamorphic rock?

No only igneous and sedimentary rocks


Why are most fossils found in sedimentary rock such as shall and limestone rather than igneous and metamorphic rock?

Because Igneous Rocks was made from magma or lava and Sedimentary Rocks are made found underwater where a bunch of rubbish is lying around and they add them together and Metamorphic Rocks were either from Igneous or Sedimentary Rocks so they could also be filled with fossils.


Name the three major groups of rocks and describe how each forms?

The three groups are igneous, sedimentary, and metamorphic. igneous forms when magma or lava cools down. sedimentary forms when sediments (clay, sand, silt etc) gets compressed. and metamorphic forms when an igneous or sedimentary goes under very high temperatures and pressure


Name the three families of igneous rocks?

This is a very simplistic answer. But, it should reveal the basic processes involved in rock formation.1. Sedimentary, like coal and limestone. They are made from particles of substances that settle and coalesce into a layer that becomes rock.2. Igneous, like granite and basalt. These rocks were formed by heat. Think of lava.3. Metamorphic: Marble and slate. These are rocks that were in another form and got changed by pressure into their present form.


What criterion is used to divide rocks into three groups?

The classification is based on the processes that formed the rock.