Question

A type of rock made as a result of cementation and compaction of sediment grains under pressure over a long period of time is called
A) Sedimentary rocks
B) Metamorphic rocks
C) Igneous rocks
D) Morphic rocks

Answer 1

Hint: The solid masses that exist naturally are known as rocks. Mineral traces can be found in the rocks. Chemicals, minerals, textures, size, form, and grains are all found in a variety of ways in rocks. These distinctive properties are essential for further categorising rocks.

Complete answer:
Inorganic in nature, a rock is a hard substance. Rock formation, like mineral creation, is a natural process. It's noteworthy to note, however, that rock is made up of two or more mineral grains. A rock is a mineraloid substance or mineral rock, in other terms. Rocks come in a variety of shapes, sizes, and textures.

Let us now consider the given options:
A) Sedimentary rocks- Sedimentary Rocks are rocks that are created by the sediment or debris of a liquid. Sediments are the particles that make up sedimentary rocks. The sediments are carried by water, ice, or the wind. They build a rock-like structure by cementing together. Sedimentary rocks are secondary rocks created by the deposition of sediments or debris on top of existing rock. Thus, this is the correct answer.

B) Metamorphic rocks- Metamorphic rocks make up a portion of the earth's crust. The chemical, mineral, and textural characteristics of these rocks are used to classify them. Metamorphic rocks are created beneath the earth's surface as a result of high temperatures and pressure. Temperature, pressure, and a variety of other factors can alter the physical and chemical properties of metamorphic rock. Thus, this is an incorrect option.
 C) Igneous rocks- Igneous Rock is a type of rock generated by the solidification and cooling of magma or lava. It's possible to make this rock with or without crystallisation. Extrusive rocks can be found on the surface, whereas intrusive or plutonic rocks can be found below the surface. The magma melts as the temperature rises, the composition changes, and the pressure drops. Thus, this option is incorrect.

D) Morphic rocks- Tt is not considered a type of rock. Igneous, sedimentary, and metamorphic rocks are the three types of rocks classified by geologists. Thus, this is an incorrect option.

Thus, the correct option is (A) Sedimentary rocks. That is, A type of rock that is made as a result of cementation and compaction of sediment grains under pressure over a long period of time is called sedimentary rocks.

Note: Sedimentary rocks are divided into three categories: Clastic sedimentary rocks are the types of stones that are generated from the residues and fragmentation of previously existing rocks. Chemical sedimentary rocks are those that form when sediments precipitate in a solution. The organic sedimentary rocks - These are the rocks that originate from the remains or debris of animals and plants.