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Week 8 Sedimentary Rocks

The rock story...

When rocks are exposed on the earth surface they are exposed to "weather" which breaks them into smaller pieces. The image below is of the road cutting beside our school. Describe any evidence of weathering that you observe.

Where is the weathered material now?
The removal of weathered rock is called erosion. What factors may have helped erode weathered material?

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Gravel 2mm to 64mm in diameter
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Sand 1/16mm to 2mm in diameter
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Silt 1/256mm to 1/16mm in diameter
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Make a sedimentation column and leave for 24 hours

Sediment columns before deposition

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Sediment Column Before Deposition

Sediment columns after depostion

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Sedimentary Rocks

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