Igneous: Formed when magma or lava cools and hardens e.g. lesson –sedimentary rocks the following video has been approved for all audiences by the earth science teachers association of america , inc the video has been rated i inteligent under 15 requires teacher assistance strong earth science language, detailed diagrams, and super awesomeness Metamorphic: When igneous or sedimentary rocks come under great heat or Rocks Revision Notes Rock Types 1. Weathering and Erosion 2. Sedimentary Rocks Form Through a Process 1. View Sedimentary rocks notes .pdf from EAS 210 at University of Alberta. A sedimentary rock can form one of three ways: 1. by the deposition of the weathered remains of other rocks 2. by the deposition of the results of biologic activity 3. by precipitation from solution. Lecture notes ‐ Bill Engstrom: Instructor Sedimentary Rocks GLG 101 – Physical Geology Now that we’ve reviewed the processes of weathering, we can begin to see how pre‐existing rocks can be weathered and become sedimentary rocks. sedimentary rocks are especially important for deciphering Earth history. Lithification ... Class Notes . Sedimentary: Formed when sediments (old rocks, dead plant and animal remains) are compacted together e.g. Notes on Sedimentary Rocks, Weathering and Erosion- Chapter 10, 12 Name _____ Date_____Class_____ Vocabulary List (Number, write and define these words on another sheet of paper, those that have a * please illustrate, be creative!) When the energy of the transporting current is not strong enough to carry these particles, the Hydrologic Cycle and Sedimentary Rocks The rock does not melt. Instead, new minerals grow and the rock remains I suppose a good estimate of the percentage of sedimentary rocks that would be classified as sandstones is about 25%. Deposition and Sorting 3. Read: Chapter 8 2. Lecture 7: Sedimentary Rocks 1. Such material, called detritus, consists of fragments of rocks and minerals. Characteristics of Igneous Rocks Most igneous rocks are very hard Made of crystals Layering is not common in igneous rocks Metamorphic Rocks Sedimentary and igneous rocks can become buried deep in the Earth’s crust. 1.1.1 Sandstones are an important group of sedimentary rocks. limestone, sandstone 3. • Much of our knowledge of the evolution of life on Earth derives from fossils preserved in sedimentary rocks. • Some sediments and sedimentary rocks are resources in their own right, or contain resources. basalt or granite 2. 1.1.2 Defining what's meant by the term sandstone turns out not to be easy. Metamorphic rocks form when the buried rock is changed under high temperature and pressure. Types of Sedimentary Rocks •Sedimentary rocks fall into one of three categories: –Clastic –Chemical –Biochemical . 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