PPT-Sedimentary Rocks UNIT 5

What are Sediments Sediments are loose Earth materials unconsolidated materials such as sand which are transported by the action of water wind glacial ice and gravity These materials are . Sedimentary rocks cover ~ 75% of Earth’s surface. ~ 5 % (by volume) of Earth’s outer 10 miles. Contain evidence of past environments:. Important resource. Coal, oil, and other fossil fuels. Groundwater resources. Chemical Sedimentary Rocks. . Limestone. Chert – Silica. Evaporites. Organic Rocks. Coal. Oil and natural gas. Clastic Sedimentary Rocks. Formed from clasts (bits and pieces of pre-existing rocks) transported, deposited,and lithified. UNIT . 5. What are Sediments. Sediments are loose Earth materials (unconsolidated materials) such as sand . which are . transported by the action of water, wind, glacial ice and . gravity.. These . materials are . Liz LaRosa . http://www.middleschoolscience.com. 2010. Images from Geology.com unless otherwise noted. What are Rocks?. A rock is a naturally occurring solid mixture of one or more minerals, or organic matter. What is the difference between clastic and non-clastic sedimentary rocks? . What we know. The process of formation for a sedimentary rock involves the following steps:. Weathering. Erosion. Deposition. How do chemical sedimentary rocks form?. What are biochemical sedimentary rocks?. Copyright © McGraw-Hill Education. Types of Sedimentary Rocks. Review. saturated. New. clastic . sedimentary rock. clastic. Color . Texture. Light. Dark. Fine. Coarse . Igneous rocks are classified according to their. . origin. , . texture. , and . mineral composition. .. Origin . D. id it harden inside the earth or on the earth’s surface?. What You Will Learn. Describe the origin of sedimentary rock. . Describe the three main categories of sedimentary rock. . Describe three types of sedimentary structures. . Where does Sand come from?. Favs. .. . Where do sediments come from?. - Weathering. – breaking down rock into smaller pieces chemically and physically.. - Erosion. - carrying away the particles and depositing them. . Glaciers. . Chemical Sedimentary Rocks. In contrast to detrital rocks, which form from the solid products of weathering, . chemical sediments . derive from ions that are carried in solution to lakes and seas. . Normally we think of time in terms of days or years but geologists commonly refer to events that happened millions or billions of years ago. For example earth is approximately 4.6 billion years old. GEOLOGIC TIME. Clastic. Sediments and Sedimentary Rocks. Clastic sediments are loose materials, however when these sediments under go lithification (. diagenesis. ), they form sedimentary rocks. . Clastic sedimentary rocks are also known as . A rock is a natural substance that is made up of solid crystals of different minerals that have been fused together into a solid lump. . Rocks can be classified by their attributes: . Texture. Hardness. BSc 4. th. Semester (Open Elective). Other than Geology main students . Dr. Abdullah Khan . Associate Professor. Department . of Geology, AMU. 1. Clastic. : . Clastic sedimentary rocks are accumulations of clasts: little pieces of broken rock which have been piled up and "lithified" by compaction and cementation..