SEDIMENTARY ROCKS AND THEIR FORMATION PROCESSES Sedimentary rocks are one of the types of rocks that make up the layers of the lithosphere. They are the most abundant rocks found on the Earth’s surface. Approximately 75 percent of the Earth's surface is covered by sedimentary rocks. One of the most distinctive features of sedimentary rocks is their layered appearance. This is because they are formed through the diagenesis process of materials from other rocks that have undergone sedimentation. D

SEDIMENTARY ROCKS: A QUICK INSIGHT Sedimentary rocks are one of the major rock types that make up the Earth’s lithosphere. They are the most widespread, covering about 75% of the Earth’s surface. What makes sedimentary rocks unique is their layered appearance. This is because they form through diagenesis, the changes that occur to sediments after deposition, during lithification, and before metamorphism. The process of sediment formation involves: Weathering (physical and chemical breakdown of r