Question

what are the type of rock ? give one example for each type​

Answer 1

Answer:

There are 3 types of rocks:

i) Sedimentary rock

ii) Metamorphic rock

iii) Igneous rock

Examples of Sedimentary rock: conglomerate and limestone.

Examples of Metamorphic rock: gneiss and marble.

Examples of Igneous rock: basalt and obsidian.

Answer 2

The different types of rocks are Sedimentary Rock, Igneous Rock and Metamorphic Rock. Examples of each one of them respectively are- Chalk, Granite and Marble.

• Igneous rocks are those that develop from magma, a molten mixture of minerals that form rocks as well as frequently volatile substances like gases and steam.
• Igneous rocks are created at high temperatures because the minerals that make up their components are crystallised from molten material.
• They come from processes occurring in the mid-to lower crust or the upper mantle, which are located between 50 and 200 kilometres (30 and 120 miles) below the surface of the planet.
• Extrusive igneous rocks, in which the cooling molten material is known as lava, are separated into two categories: intrusive (placed in the crust), and extrusive (extruded onto the surface of the land or ocean bottom).
• Sedimentary rocks are those that form at the Earth's surface and are crushed and cemented together with the help of flowing water, wind, ice, or living creatures.
• The majority of them are dumped from the top of the land to the bottom of lakes, rivers, and seas.
• Sedimentary rocks often contain layers and are stratified. Layers can be identified by variations in colour, cement type, particle size, or internal organisation.
• Rocks that have undergone changes due to high pressure, temperature, and chemically active solutions are known as metamorphic rocks.
• Chemical (compositional) and physical (textural) alterations are also possible. Deep beneath the Earth, processes that generate new minerals, textures, and crystal formations frequently result in the formation of metamorphic rocks.
• Recrystallization can be helped by ductile deformation and the presence of interstitial fluids like water since it mostly occurs in the solid state rather than through total remelting.
• Because of the segregation of minerals into distinct bands during metamorphism, there is frequently visible layering or banding.
• Pyrometamorphism, which takes place close to burning coal seams sparked by lightning strikes, and meteorite impact events may both cause metamorphic processes to take place at the Earth's surface.

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