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![]() edHelper.com Rocks and Minerals |
Limestone |
| edHelper's suggested reading level: | grades 3 to 5 | |
| Flesch-Kincaid grade level: | 4.27 |
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Limestone
By Meg Leonard |
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1 There are different types of rock. One type is sedimentary rocks. They take millions of years to form. These types of rocks are formed from little bits of earth. These bits are washed downstream. They settle to the bottom of lakes, rivers, or oceans. As time passes, a new layer will form on top of the old layer. The top layers put pressure on the bottom layers. Eventually, the bottom layers turn to rock. The bits of earth form different types of sedimentary rocks. Limestone is a sedimentary rock. It is formed from calcite. It .....