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Quick-write

Quick-write. Why do you think some rocks fizzed with acid?. Sedimentary Rocks. Sedimentary rocks are formed when sediment is pressed and cemented together over millions of years.

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Quick-write

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  1. Quick-write • Why do you think some rocks fizzed with acid?

  2. Sedimentary Rocks • Sedimentary rocks are formed when sediment is pressed and cemented together over millions of years.

  3. Sediment is small pieces of material that have been broken off rocks and have been deposited by water, wind or ice.

  4. Types of sedimentary rocks: • Limestone • Made from sea shells. Sea shells are made from the mineral calcite. • Smooth texture. • Limestone rock fizzes when tested with acid.

  5. Calcite is CaCO3 (calcium carbonate). CaCO3+ acid CO2 CO2 causes effervescence (fizzing)

  6. 2) Sandstone • Made from sand particles cemented together. • Rough texture. • When rubbed together sand particles break off. • Does not fizz with acid; does not contain calcite.

  7. 3) Shale • Made from very small particles cemented together. • Smooth texture. • Black in color. • May contain fossils. • Does not fizz with acid; does not contain calcite.

  8. 9 8 10 7 9 6 8 7 5 6 4

  9. Limestone 9 8 10 Limestone 7 9 6 8 7 5 6 4

  10. Limestone 9 Sandstone Limestone 8 10 Shale Limestone 7 9 Sandstone Sandstone 6 8 Limestone Shale 7 5 Limestone Sandstone 6 4

  11. 4,5,9 & 10 are all limestone Geologists have given them different names: • 4 is Muav limestone • 5 is Redwall • 9 is Toroweap limestone • 10 is Kaibab limestone

  12. 8 & 9 are both sandstone • 6 is Supai sandstone • 8 is Coconino sandstone 7 is called Hermit Shale

  13. Toroweap Limestone 9 Kaibab Limestone Coconino Sandstone 8 10 Hermit Shale Toroweap Limestone 7 9 Supai Sandstone Coconino Sandstone 6 8 Redwall Limestone Hermit Shale 7 5 Muav Limestone Supai Sandstone 6 4

  14. Which layer of rock is the oldest on your correlation sheet?

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