Formation of Sedimentary Rock
Sedimentary rocks are rocks that are formed when particles of minerals or organic organisms are turned into solid rock due to pressure.
There are three main types of sedimentary. The first is detrital rocks, which are formed by sediments from pre-existing sedimentary rocks that have been grated off from wind or water erosion then have found their way way to a water source such as a river, lake, or ocean. Once they have made it to the water source they are put under pressure due to the weight of the water and other sediments on top of them. This pressure, along with the sticky mud, forms them into rock. A few examples of detrital sedimentary rocks are conglomerate, sandstone, and shale.
The second type of sedimentary rock is organic rock. These rocks are formed from the particles of decaying plants, animals, or shells that have been compacted into rock. Examples are coal, limestone, and chalk.
The finial type of sedimentary rock is chemical rock. These rocks are formed when particles that have been dissolved in a solution become separate from the solution again and then harden into rock. Some examples of these rocks are rock salt and calcite.
Sedimentary rocks have many uses in our society. Coal is burned to act as fuel to power furnaces in houses. Limestone is a used in building. Sandstone is also a common building material. In fact, the White House, the home of the president of the U.S.A. is constructed of sandstone. In conclusion, Sedimentary rocks have many uses in the world that we live in.
Sources:
Milken Press: Geology
Geography: A Golden Guide
http://en.wikipedia.org/wiki/Sedimentary_rock
There are three main types of sedimentary. The first is detrital rocks, which are formed by sediments from pre-existing sedimentary rocks that have been grated off from wind or water erosion then have found their way way to a water source such as a river, lake, or ocean. Once they have made it to the water source they are put under pressure due to the weight of the water and other sediments on top of them. This pressure, along with the sticky mud, forms them into rock. A few examples of detrital sedimentary rocks are conglomerate, sandstone, and shale.
The second type of sedimentary rock is organic rock. These rocks are formed from the particles of decaying plants, animals, or shells that have been compacted into rock. Examples are coal, limestone, and chalk.
The finial type of sedimentary rock is chemical rock. These rocks are formed when particles that have been dissolved in a solution become separate from the solution again and then harden into rock. Some examples of these rocks are rock salt and calcite.
Sedimentary rocks have many uses in our society. Coal is burned to act as fuel to power furnaces in houses. Limestone is a used in building. Sandstone is also a common building material. In fact, the White House, the home of the president of the U.S.A. is constructed of sandstone. In conclusion, Sedimentary rocks have many uses in the world that we live in.
Sources:
Milken Press: Geology
Geography: A Golden Guide
http://en.wikipedia.org/wiki/Sedimentary_rock