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10 December 2012

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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10 December 2012

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  1. 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?

  2. Sedimentary Rock

  3. 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

  4. 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!

  5. 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

  6. 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

  7. Sedimentary Rock • Summary: • How do sedimentary rocks form? • Describe the three types of sedimentary rock.

  8. 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

  9. 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?

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