Respuesta :
Sedimentary rocks are formed by the accumulation of sediments over time. Sandstone (sedimentary rock) is formed by compaction and cementation. Thus, option b is correct.
What are compaction and cementation?
Compaction and cementation are the processes that form the sedimentary rock from the deposition of the sediments over time. The weathering process like erosion breaks the parent rocks into sediments.
The sediments then undergo cementation, where the chemical substance of the sediments experiences desolvation followed by recrystallization and compaction.
In compaction, the sediment particles are deposited into layers because of the high pressure and weight of the upper layers. The method of compaction and cementation combines the sediment together to make the sedimentary rock.
Therefore, sandstone is formed by compaction and cementation.
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