5/5/2023 0 Comments Thinking rock clear sorting![]() ![]() ![]() This is because the rapid movement of the water causes the soil and rocks along the bank of the river to erode, or break away. Rivers are usually very active in sedimentation. Sedimentation often occurs where there is a moving body of water. The process of creating sedimentary rock is called sedimentation. Why? Since sedimentary rock is soft and can be easily chipped and brushed away, it reveals the mineralized fossils within. Most fossil formations are found in sedimentary rock. Oftentimes, sedimentary rock contains fossils and other debris that are deposited within the layers. Because of the many layers, sedimentary rocks are soft and brittle. You can even chip away at the layers, sometimes causing a layer to flake off of the surface. If you look closely at the edges of the flagstone, you will see that the rock is made up of many layers. If you have a patio at home that is made from flagstone, you have a source of sedimentary rock. Over two-thirds of the land mass on Earth is covered in sedimentary rock! Over geologic time (thousands or hundreds of thousands of years), the layers will harden into solid sedimentary rock. The sediments mix with water and eventually settle on the bottom of rivers and streams and form layers. The layers are made out of sediments, meaning particles of soil, other rocks, and mineral deposits. Sedimentary rock forms in layers that are deposited one after the other over long periods of time. Have you ever seen rocks with distinct stripes of color or texture? If so you've been looking at sedimentary rock. ![]()
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