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Dinosaur fossils are usually found in sedimentary rock.

Checking what kind of fossils are in the same layer of sediment. * The oldest method is stratigraphy, studying how deeply a fossil is buried.

As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.

A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.

Newer layers are formed on top of older layers, pressurizing them into rocks.

Last modified 12-Dec-2019 16:17