Which rock type is formed from layers of sediment cemented together and may contain fossils?

Which rock type is formed from layers of sediment cemented together and may contain fossils?

• A. Igneous Rock
• B. Sedimentary Rock
• C. Metamorphic Rock
• D. Fossil Rock

Answer: (B)

Sedimentary rocks form from particles of other rocks and organic material that settle out of water or air in layers. Over time, these layers are buried, compacted, and cemented together by minerals carried in water, turning loose sediments into solid rock. This process, called lithification, often preserves evidence of past life, so fossils can be found within these rocks. Igneous rocks come from cooling molten material, not from layered deposition. Metamorphic rocks start as other rocks but are changed by heat and pressure, which can alter minerals and texture rather than create the characteristic layered sediments. There isn’t a real rock type called “Fossil Rock.” So the description fits sedimentary rock best, which forms from layered sediments that cement together and can contain fossils.

Sedimentary rocks form from particles of other rocks and organic material that settle out of water or air in layers. Over time, these layers are buried, compacted, and cemented together by minerals carried in water, turning loose sediments into solid rock. This process, called lithification, often preserves evidence of past life, so fossils can be found within these rocks.

Igneous rocks come from cooling molten material, not from layered deposition. Metamorphic rocks start as other rocks but are changed by heat and pressure, which can alter minerals and texture rather than create the characteristic layered sediments. There isn’t a real rock type called “Fossil Rock.”

So the description fits sedimentary rock best, which forms from layered sediments that cement together and can contain fossils.