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Wednesday February 15, 2012

Wednesday February 15, 2012. (Sedimentary Rocks; WS – Sedimentary Rocks [Part 1]). The Launch Pad Wednesday, 2/15/12. No Launch Pad Today. Announcements. I will be available after school today until 4:45 . Latest News. China's New Space Exploration Vision Shoots for the Moon.

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Wednesday February 15, 2012

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  1. WednesdayFebruary 15, 2012 (Sedimentary Rocks; WS – Sedimentary Rocks [Part 1])

  2. The Launch Pad Wednesday, 2/15/12 • No Launch Pad Today

  3. Announcements • I will be available after school today until 4:45.

  4. Latest News China's New Space Exploration Vision Shoots for the Moon Click below for article: http://www.space.com/14309-china-space-future-missions-moon.html

  5. Sedimentary Rocks Sedimentary rocks form from sediment, which is the product of weathering. Sedimentary rocks make up about 75% of all rock outcrops on Earth’s continents. These rocks are used to reconstruct much of Earth’s history, as they provide clues to past environments and sediment transport. Sedimentary rocks often contain fossils.

  6. Sedimentary Rocks Sedimentary rocks are of tremendous economic importance because they can contain fossil fuels: coal oil natural gas They are also sources of iron and aluminum.

  7. Sedimentary Rocks There are two classifications of sedimentary rocks based upon the source of the material in the rocks, detrital and chemical. Materials accumulating as sediment have two principle sources: Sediment may originate as solid particles from weathered rocks, such as igneous rocks. These particles are called detritus, and the sedimentary rocks they form are called detrital sedimentary rocks. In detrital rocks, the material is in solid particles, so geologists use particle size to distinguish amoung detrital rocks.

  8. Detrital Sedimentary Rocks

  9. Detrital Sedimentary Rocks breccia (course, angular particles) siltstone (fine particles) shale (very fine particles) conglomerate (course, rounded particles) sandstone (medium particles)

  10. Chemical Sedimentary Rocks There are two classifications of sedimentary rocks based upon the source of the material in the rocks. Materials accumulating as sediment have two principle sources: The second major source of sediment is solid material produced largely by chemical weathering. When these dissolved substances are precipitated back as solids, they are called chemical sediments, and they form chemical sedimentary rocks. Chemical sedimentary rocks are derived from material that was once in solution and precipitates to form sediment. They are either directly precipitated as the result of physical processes, or deposited through life processes (biochemical origin.)

  11. Chemical Sedimentary Rocks

  12. Chemical Sedimentary Rocks fossiliferous limestone Chalk coquina (shell fragments) Agate flint jasper

  13. Chemical Sedimentary Rocks evaporate deposits

  14. Worksheet Sedimentary Rocks (Part 1)

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