Sedimentary Rocks are formed with particles of other rock. There are 3 different types of Sedimentary Rocks. These include: Clastic, Chemical, and Organic. Each of these rocks have their own characteristics and are found in numerous places all over the globe. In addition, these rocks actually cover more than 70% of our planet. Although they may not be fun to look at, they certainly play a large role in Earth's history.
The rock above is known as a clastic rock. Clastic rocks are formed by a process known as mechanical weathering. This involves the formation of sediments through the weather and our planets' environment.
Secondly, we have Chemical Sedimentary Rocks. These rocks are formed by precipitation of solution. They are more textured then clastic rocks and are often heavier and/or more dark in color.
Lastly, we have rocks known as Organic Sediments. These are formed from plant debris and animal debris. They can appear to be more unique in texture and in color. The density is also varied depending on type.
Lots of Sedimentary Rocks can be found in our own country! The Grand Canyon region is filled with sediments of all colors, shapes, widths, lengths, and types. The canyon itself is one large sedimentary rock. All of the layering in the canyon provides scientists with solid proof that these processes really do exist and take millions of years.
Metamorphic rocks are rock fragments that have been affected by heat pressure, and chemical processes. They are usually found deep under the Earth's surface. There are two types of main metamorphic rocks, they are known as foliated and non-foliated. The chemical composition of these rocks can vary and they have interesting wavy-like textures.
Large Metamorphic Rock on the Water
FOLIATED METAMORPHIC ROCKS
These types of rocks have a layered and striped kind of look. Their textures can be hard, soft, and even broken or burned looking. These textures and looks are caused by heat and pressure the rock has to withstand in its origin.