PPT-Sedimentary Rocks

Although there is absolutely no compositional designation assigned to any of the various particle sizes there is nevertheless some size segregation The estimated range of sizes for each type of particle is indicated by the bracket with the average size indicated by the arrow head Rock fragments for example usually range in size from sand to the largest of particle sizes with an average size being about pebble size Most quartz grains on the other hand ranges in size from pebble to silt with an average size of sand The only size that uses a mineral name is claysize most likely because clay minerals dominate the claysized particles. Colby Geology. Igneous Rocks. Classification based on . composition. and . texture. .. COMPOSITION. Principally the rock-forming minerals. Olivine. Pyroxenes. Amphiboles. Micas. Feldspars. Quartz. Constitute 95% of minerals in . 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. 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. (pages 102–106). 1. Describe how sedimentary rocks form.. 2. List and describe the three major types of sedimentary rocks.. Objectives. write these down!. Sediment. Erosion. Deposition. C. ompaction. 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. 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?. a. metamorphic rock. . b. sedimentary rock. . c. igneous rock. d. sediment. . #1. Which of the following processes is NOT part of the rock cycle?. a. solidification. . b. chiseling. c. erosion. d. metamorphism. Sedimentary rocks form in 1 of 3 ways:. 1. . Clastic. Sedimentary Rocks- made of pieces and grains of other rocks. Material such as . sand . or . mud. -usually deposited in . water. Conglomerate sandstone. 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. Rocks 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 NAME THAT ROCK!. This rock is formed by cooling Magma. Igneous. This is formed underwater. It is made up of bits of shells and skeletons of sea animals. Sedimentary . This rock is formed by limestone that has been exposed to heat pressure.. . 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. . 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.. Sediment . Texture. Sediment texture refers to the shape, size and three-dimensional arrangement of the particles . that make . up sediment or a sedimentary rock.. Textures can be . clastic or . crystalline.