|
|
|
|
Limestone is sedimentary rock consisting mostly of organic material such as skeletons and shells of marine creatures and sediments. It is formed by material which settles to the bottom of bodies of water, and over millions of years, solidifies into solid rock. Earth movements over extremely long periods of earth's history can lift limestone miles into the air. The summit of Mount Everest is limestone that started out on an ocean floor. |
|
|