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10 December 2012. OBJECTIVE: Describe the origin of sedimentary rock. . INTRO. Week WS #16: Have you ever tried to build a sand castle at the beach? Where do you think the sand came from?. Sedimentary Rock. Sedimentary Rock. Sedimentary rock Strata .

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10December 2012

OBJECTIVE: Describe the origin of sedimentary rock.

INTRO

  • Week WS #16:
    • Have you ever tried to build a sand castle at the beach? Where do you think the sand came from?
sedimentary rock1
Sedimentary Rock
  • Sedimentary rock
  • Strata
  • Forms when sediments are compacted into a rock
  • Most created at the bottom of oceans and lakes
  • Can contain fossils of plants and animals
  • Layers of rock
sedimentary rocks
Sedimentary Rocks
  • 3 Types:
    • Clastic Sedimentary Rock
  • Made of fragments of rocks cemented together by minerals
  • Course-grained (rough)
  • Medium-grained
  • Fine-grained (smooth)
  • Can easily record ancient animal footprints, wave ripples, and even raindrops!
sedimentary rocks1
Sedimentary Rocks
  • Chemical sedimentary rock
  • Forms from solutions of dissolved minerals and water
  • Dissolved material eventually crystallizes and forms minerals in the sedimentary rock
  • Example:
    • Halite (salt) is found in sedimentary rocks
sedimentary rocks2
Sedimentary Rocks
  • Organic sedimentary rock
  • Forms from the remains of plants and animals
  • Reacts with acid because of organic material
  • Example:
    • Limestone forms when coral becomes compacted and cemented
    • Coal forms from partially decomposed plants buried deep underneath sediments
sedimentary rock2
Sedimentary Rock
  • Summary:
    • How do sedimentary rocks form?
    • Describe the three types of sedimentary rock.
sedimentary rock lab
Sedimentary Rock LAB
  • Name & Type – use chart inside box
  • React to Acid?
    • Drip one drop of acid onto rock
    • Use magnifying lens to watch closely for any fizzing or bubbling
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10December 2012

OBJECTIVE:Describe the origin of sedimentary rock.

OUTRO

Why do you think raindrop impressions are more likely to be preserved in fine-grained sedimentary rock rather than in course-grained sedimentary rock?