The Grand Canyon
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Transcript of The Grand Canyon
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The Grand Canyon
By: Leah Bahlman
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Water
• How was the Grand Canyon formed? The Colorado River cuts through the Colorado Plateau. For 6 million years, the water has been wearing down the rock. The river also carries away the broken particles of rock.
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Superposition
• The oldest layer of rock is at the bottom.• The newest layer of rock is at the top.• A geologist is a scientist who studies rocks.• Geologists look at rock layers to find out how
old the rocks are.• A geologic time scale is a record of the
geologic events and life forms in Earth’s history.
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History lesson
• The walls of the Grand Canyon in Arizona show 2 billion years of Earth’s history.
• If I went down into the Grand Canyon I would see sandstone and limestone. The deeper I go the older the rocks are.
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Fossils
• Fossils are the preserved remains or traces of living things.
• Most fossils form when living things die and are buried by sediments.
• Paleontologists are scientists who study fossils.
• There are many fossils in the Grand Canyon.
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Grand Canyon
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Colorado river
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Rock layers of the Grand Canyon
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Erosion and Deposition
• Erosion is the process by which water, ice, wind, or gravity moves weathered rock and soil.
• Deposition is the process in which sediment is laid down in new locations.
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Map of the Grand Canyon
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Grand Canyon pictures
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The rock cycle
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Sedimentary Rock
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Fossils
Fossils are the preserved remains or traces of living things.
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glacier
• Glacier is a large mass of moving ice and snow on land.
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Colorado RiverA river is a large stream
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weathering
• Weathering is the chemical and physical processes that break down rock at earth’s surface.
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Grand Canyon Facts
• The Grand Canyon is 277 miles long. And up to 18 miles wide. It is one mile deep. The Grand Canyon National Park is in Arizona.