Here's why:
* Limestone is a sedimentary rock. It forms from the accumulation of marine organisms' shells and skeletons.
* The Earth's core is incredibly hot and dense. It is primarily composed of iron and nickel, with trace amounts of other elements. The pressure at the core is immense, and temperatures reach over 5,000 degrees Celsius (9,032 degrees Fahrenheit). Limestone would simply melt and decompose under these conditions.
The Earth's core is divided into two parts:
* Inner core: A solid sphere of mostly iron and nickel, due to the immense pressure.
* Outer core: A liquid layer of mostly iron and nickel, which generates Earth's magnetic field.
Limestone is found in the Earth's crust, which is much cooler and less dense than the core.
