One of the more common rocks on earth is limestone.

Name: One of the more common rocks on earth is limestone.
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Limestone is a common sedimentary rock that is made up primarily of calcium carbonate. It forms from the accumulation of marine animal shells and other organic debris over time. It is found all over the world and is used for building materials, as a soil conditioner, and in many other applications.

One of the More Common Rocks on Earth Is Limestone