PPT-Textures and Structures of Sediment and Sedimentary Rocks
Author : ceila | Published Date : 2023-10-04
Sediment Texture Sediment texture refers to the shape size and threedimensional arrangement of the particles that make up sediment or a sedimentary rock Textures
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Textures and Structures of Sediment and Sedimentary Rocks: Transcript
Sediment Texture Sediment texture refers to the shape size and threedimensional arrangement of the particles that make up sediment or a sedimentary rock Textures can be clastic or crystalline. http://www.beg.utexas.edu/mainweb/publications/graphics/granite.htm. http://en.wikipedia.org/wiki/File:USDA_Mineral_Sandstone_93c3955.jpg. http://www.gccaz.edu/earthsci/imagearchive/gneiss.htm. Remember the. 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. . Sedimentary Rocks. What is a sedimentary rock?. Sedimentary rocks are products of mechanical and chemical weathering. They account for about 5% (by volume) of Earth’s outer 10 miles. Contain evidence of past environments. . r. ocks. 97,3% of Hungary is . covered. . with. . some. . kind. . of . sediment. 75% of land surface on the earth is covered by thin veneer of sediments or sedimentary rocks.. Classification. . 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. Sedimentary rocks 101. Sedimentary rock forms at or near the earth’s surface. Formation. Processes that help form sedimentary rock . include: . weathering. , . erosion. , . deposition. , . compaction. 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. 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?. Microbial assemblages (in biofilms) form sticky films that influence sediment deposition. Microbially. -bound sediments are stabilized and more cohesive. Microbialite. : a rock formed via the influence of microbial trapping, binding, and precipitation. TRANSPORT MEDIA. Gravity. . is the . simplest mechanism of sediment . transport.. It includes the . movement of particles under gravity . down a . slope. .. Rock falls generate piles of sediment at . . 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. . 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 . BSc 4. th. Semester (Open Elective). Other than Geology main students . Dr Abdullah Khan. Associate Professor. Department of Geology, AMU. Sedimentary structures. Sedimentary structures are generally three-dimensional physical features of sedimentary rocks; they are best seen in outcrop or in large hand specimens rather than through a microscope. .
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