GEOLOGY

EARTH SCIENCE

NATURAL HAZARDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Layering, compaction, and cementation make ____
A
Igneous
B
Metamorphic
C
Sediment
D
Sedimentary rock
Explanation: 

Detailed explanation-1: -Sedimentary rocks are formed by the deposition and subsequent cementation of that material at the Earth’s surface and within bodies of water. When water evaporates from the surface, it leaves behind a layer of sediments. Such layers are compacted over a long period of time and give rise to sedimentary rocks.

Detailed explanation-2: -Sedimentary rocks are those formed from the compaction and cementation of fragments of pre-existing rocks called clasts, or plant and animals remains. The exogenic processes of weathering and erosion create the raw materials for sedimentary rocks.

Detailed explanation-3: -Compaction is when sediment is pushed together by the weight of water and other sediment pushing down on it. Cementation is the last stage in the cycle and happens when sediment is glued together by minerals such as silica and calcium carbonate as the minerals infiltrate pore space between compacted sediment.

Detailed explanation-4: -This process of compacting and cementing sediment forms sedimentary rock.

Detailed explanation-5: -Pieces of rock are loosened by weathering, then transported to some basin or depression where sediment is trapped. If the sediment is buried deeply, it becomes compacted and cemented, forming sedimentary rock.

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