Which kind of rock is most likely to contain a trilobite fossil? 1) sedimentary
2) igneous
3) metamorphic
4) plutonic

Explain how it formed. Thank you.

1) sedimentary

Explanation:

Sedimentary rocks are formed by the accumulation and subsequent compression of sediments (i.e., minerals and once-living organisms known as fossils) on the Earth's surface. Almost all fossils are found within sedimentary rocks. Some examples of sedimentary rock that contain fossils include limestone, mudstone and shale. Rock layers are known as strata. The oldest layers containing the once-living organisms (which were fossilized as they formed) are found at the bottom, while the youngest layers are found at the top.

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