This is the question for the letter F: Fossils!

Fossils of a trilobite and starfish

Fossils are usually found in what type of rock?

A. Igneous

B. Metamorphic

C. Sedimentary

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The answer is C: Sedimentary

Fossils are most often formed in sedimentary rock

Sedimentary rock is formed from the mud and sand that settle at the bottom of seas, lakes, and swamps.

Usually, animal fossils result when an organism dies and is quickly buried by sediment. The soft tissue decomposes. Minerals replace the bones and create stones. The fossils are actually rocks.

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