Sedimentary Rocks Essay

541 Words3 Pages
Sedimentary Rocks The Beginning Sedimentary rocks are some of the foundations of the earth. They range from rock salt, to gypsum, slate, sandstone, limestone, and even coal. The grains of these rocks range from a coarse grain like cement, to very fine that only a microscope can see the grain. Where do these rocks come from? How are these sedimentary rocks formed? What are some characteristics of these rocks that can distinguish them from other rocks? These are the questions that will be answered. Origination and Creation Sedimentary rocks are all around and are common to be seen. Where do these rocks come from? Sedimentary rocks come from the very thing they are named after; sediment. These rocks originate from weatherization and a few other processes over a long period of time. For example, if a mineral is stripped from some rocks during weatherization and are carried to a body of water, the minerals will eventually settle at the bottom of the lake and through some other processes settle down and form rocks (Murck, Skinner, & Mackenzie, 2008). Dead plants and animals, along with minerals already at the locations help to create the sedimentary rocks and their unique characteristics. The Three Categories There are three different categories of sedimentary rocks that classify what materials the rocks are comprised of and also what process created them. The first category is Clastic Sedimentary rocks. There are four subclasses of clastic sedimentary rocks being; conglomerate, mudstone, sandstone, and shale (Murck, Skinner, & Mackenzie, 2008). These rocks reflect the properties of the sediment that it came from and this category is distinguishable by the grains that are contained within the rock. The second category is Chemical Sedimentary rocks. These sedimentary rocks are formed from sediment that came from chemical weatherization. These

More about Sedimentary Rocks Essay

Open Document