Sedimentary rock has sand, minerals, and shells. They are smashed together, or cemented, together.
That would be sedimentary rock
The rock that has sand, minerals, and shells is primarily sandstone, which is a clastic sedimentary rock made up mostly of sand-sized particles. It can contain quartz grains as well as shell fragments, indicating its formation in marine environments. Understanding its composition helps geologists infer past environmental conditions.
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