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Sedimentary Rocks 2

Sedimentary Rocks 2. Clastic, Chemical, and Organic Natural Resources (coal and oil). Vocabulary. Topography: The landscape of a place Precipitation: The process of forming rock from a solution through evaporation. Clastic Sedimentary Rock.

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Sedimentary Rocks 2

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  1. Sedimentary Rocks 2 Clastic, Chemical, and Organic Natural Resources (coal and oil)

  2. Vocabulary • Topography: The landscape of a place • Precipitation: The process of forming rock from a solution through evaporation

  3. Clastic Sedimentary Rock • Clastic rock is formed through when fragments of other rocks are deposited, compacted and cemented together. • Clastic rock can take many different forms depending on the size of the fragments (clasts) • Examples of clastic rocks include: • Shale, Sandstone, Mudstone, Conglomerate, and Coal

  4. The fragments (clasts) can be very small or quite big Sandstone Conglomerate

  5. Let’s see this in action… http://www.classzone.com/books/earth_science/terc/content/visualizations/es0605/es0605page01.cfm?chapter_no=visualization

  6. Chemical Sedimentary Rock • Chemical sedimentary rock forms through the process of PRECIPITATION. A solution such as sea water evaporates and leaves behind the minerals to create a new rock. • Limestone is made from a solution of Calcite that comes from sea shells • Halite (rock salt) is made when highly concentrated salt water • Often, these types of rocks are formed in arid climates where evaporation is most intense

  7. Some examples… Halite Limestone

  8. Organic Sedimentary Rock • Organic sedimentary rock is made from organic matter • Because organic matter can burn, this kind of rock is often used for energy. • Coal is made from dead vegetation in swamps that is compacted over time • Oil is made from dead microorganisms (like algae) that fall to the bottom of the ocean and are compacted over millions of years. • That is why they are called FOSSIL FUELS!!

  9. Let’s see how coal is made… http://www.sceyencestudios.com/movies/coalformation.swf

  10. Coal Mining

  11. Where is oil found • Oil is found in sedimentary rocks that are POROUS and can soak up the oil. • When geologists are looking for oil, they look for sedimentary rocks like shale that can hold oil.

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