How are sedimentary rocks formed?

How are sedimentary rocks formed?

• A. From particles that are compacted and cemented together, often with fossils.
• B. From cooling and solidification of molten rock
• C. From minerals crystallizing from water
• D. From evaporation and precipitation of minerals

Answer: (A)

Sedimentary rocks form when loose particles settle out, accumulate in layers, and are pressed together over time so they become solid. This compaction and cementation binds the grains and often preserves the remains of organisms, which is why fossils are commonly found in these rocks. Cooling and solidification of molten rock produces igneous rocks, not sedimentary ones. Minerals crystallizing from water or rocks forming by evaporation and precipitation describe chemical processes that build chemical sedimentary rocks, not the typical clastic sedimentary rocks formed by accumulating particles.

Sedimentary rocks form when loose particles settle out, accumulate in layers, and are pressed together over time so they become solid. This compaction and cementation binds the grains and often preserves the remains of organisms, which is why fossils are commonly found in these rocks.

Cooling and solidification of molten rock produces igneous rocks, not sedimentary ones. Minerals crystallizing from water or rocks forming by evaporation and precipitation describe chemical processes that build chemical sedimentary rocks, not the typical clastic sedimentary rocks formed by accumulating particles.