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What is a sedimentary rock?
Quick Answer
A sedimentary rock forms from layers of sediment that are compacted and cemented over time. It often preserves fossils and clues about past environments.
The Full Story
Sedimentary rocks are created when particles from older rocks, shells, minerals or organic material settle in layers and are buried. Over time, pressure compacts the sediments and minerals glue them together. Common examples include sandstone, shale and limestone. Because they form at or near Earth’s surface, sedimentary rocks are valuable records of rivers, deserts, seas and ancient life.
Key Facts
1.Includes sandstone, shale and limestone
2.Often preserves fossils
3.Forms by compaction and cementation
YouTube Angle
Suggested video title for this topic:
"The rock type that stores Earth’s history in layers"
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