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Unit 1: Sixth Grade.  Wind, water, ice, sunlight, and gravity cause rocks to weather into sediments.  These sediments are moved from one location to.

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Presentation on theme: "Unit 1: Sixth Grade.  Wind, water, ice, sunlight, and gravity cause rocks to weather into sediments.  These sediments are moved from one location to."— Presentation transcript:

1 Unit 1: Sixth Grade

2  Wind, water, ice, sunlight, and gravity cause rocks to weather into sediments.  These sediments are moved from one location to another by the process of erosion.  Erosion: The movement of the material from one place to another

3  The sediments are eventually deposited on to older layers and form new ones.  The sediments become compacted and dissolved minerals separate from water and form a natural cement—Lithification.  Sedimentary rocks are formed

4  STRATA  Layers of rock  STRATIFICATION  process in which sedimentary rocks are arranged in layers

5  Wind blew over thousands of years  Carried mineral/rock fragments, “sand” to ocean floors, lakes rivers  The sand mixes with quartz or calcite.  Pressure over time causes them to become rock

6  But not all sand is the same!  Over millions of years, smaller grains separated from the larger grains and were layered on the bottome

7  Why do you think there are so many colors in the stone?  Can you describe the pattern on this structure?  Does this structure support the idea that layers of sediments piled on top of each other and exposed to heat and pressure form sedimentary rock?

8  Form from remains or fossils of once living things.  EXAMPLE: limestone, coal  COAL----  Forms underground when partially decomposed plant material is buried beneath sediment and is changed into coal the pressure from layers above.  This process takes millions for years.  Non-renewable fossil fuel

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10  Made from fragments (sediments) of rocks that are cemented together by minerals.  They are classified according to the size of the fragments.  EXAMPLES: conglomerate, sandstone, siltstone, shale

11 Loose sediments Clastic Sedimentary Rock

12  Form from solutions of dissolved minerals and water.  EXAMPLE: halite

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