Chalk, limestone, shale, and sandstone are all examples of sedimentary rocks. All these different sedimentary rocks are formed from the broken remains of other rocks that become joined together.

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Uncovering the fossil record requires scientists with many different areas of expertise ... There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all fossils ...

These sedimentary rocks are born from the decay and fossilization of marine organisms — think coral and clams. Gravel, on the ...