In which kind of rocks are the minerals deposited and accumulated in the stratas?a)Igneous rocksb)Metamorphic rocksc)Sedimentary rocksd)None of theseCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

C is the correct option.Minerals are found in layers or strata in sedimentary rocks. Minerals are accumulated in horizontal strata after being exposed to high heat and pressure for a long period of time. Coal, iron ore, gypsum, potash salt etc are formed in this way.

Answer

In sedimentary rocks a large number of minerals occur in  layers. They have been formed as a result of deposition, accumulation and concentration in horizontal strata. For example coal and some forms of iron ore have been concentrated as a result of long periods under great heat and pressure.

Answer

Sedimentary rocks are the type of rocks in which minerals are deposited and accumulated in the stratas.

Sedimentary rocks are formed from sediments that have been weathered and eroded from pre-existing rocks. These sediments are then transported by water, wind, or ice and eventually deposited in layers. Over time, these layers of sediments are compacted and cemented together, forming sedimentary rocks.

Here is a detailed explanation of why minerals are deposited and accumulated in sedimentary rocks:

1. Weathering and Erosion:
- The process of weathering breaks down rocks into smaller particles, such as sand, silt, and clay.
- Erosion then carries these particles away from their original location, usually by water, wind, or ice.

2. Transportation:
- The eroded particles are transported by rivers, streams, glaciers, or wind over long distances.
- During transportation, the particles undergo sorting, where larger and heavier particles settle faster than smaller and lighter ones.

3. Deposition:
- Eventually, the transported particles come to a rest and settle in a new location.
- This settling of particles is called deposition and occurs in bodies of water (e.g., rivers, lakes, oceans) or on land (e.g., deserts, floodplains).

4. Compaction and Cementation:
- Over time, the weight of the overlying sediment layers compresses the deposited particles.
- This compaction reduces the pore spaces between the particles, causing them to become tightly packed.
- Additionally, minerals dissolved in water can fill these pore spaces and act as a cementing agent, binding the particles together.

5. Lithification:
- Through compaction and cementation, the loose sediment turns into solid rock.
- This process is called lithification and transforms the sediment into sedimentary rock.

6. Mineral Deposition:
- During the process of compaction and cementation, minerals dissolved in water can crystallize and fill the pores between the particles.
- These minerals, such as quartz, calcite, or clay minerals, become part of the sedimentary rock and contribute to its composition.

In conclusion, sedimentary rocks are formed through the deposition, compaction, and cementation of sediments. During this process, minerals can be deposited and accumulated, resulting in the formation of various types of sedimentary rocks.

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