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The town of Marshfield had to bring in truckloads of boulders to help support hundreds of yards of Seawall that are in danger of collapsing, leaving oceanfront property vulnerable to tidal surges and ocean storms. For more on this story, pick up a copy of The Patriot Ledger, your original SOURCE for local news and check patriot ledger.com for updates on the crisis.

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Explore British Columbia: Adventures on the Fraser River

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Explore British Columbia: Adventures on the Fraser River

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Explore British Columbia: Adventures on the Fraser River

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The story of the formation of the Cliffs of Moher, Clare, Ireland.

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Watch this is you want to see more about Mpumalanga Park.

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Mpumalanga Video - The place where the sun rises.People are drawn to Mpumalanga by the magnificent scenery, by the fauna and flora and by the saga of the 1870s gold rush era and a wealth of fascinating tribal legends. Mountains, panoramic passes, valleys, rivers, waterfalls and forests characterise the landscape.

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All About Glaciers for Kids: How Glaciers Form and Erode to Create Landforms - FreeSchool

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Landforms, Hey!: Crash Course Kids #17.1

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How do glaciers shape the landscape? Animation from geog.1 Kerboodle.

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How Rivers and Streams Affect the Earth's Surface

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How Rivers and Streams Affect the Earth's Surface

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What Is a River?

Every Sunday, Jenny looked forward to a big family dinner with her dad's famous mashed potatoes. She always liked to see how big of a mashed potato mountain she could make. Jenny loved pouring a stream of gravy over the top and watching as it flowed down the sides. Sometimes, if she poured slowly, the gravy would carve little paths in the mountain and other times, if she poured too quickly, it would get all over everything on her plate!

'You know,' noticed her grandfather, a scientist, during one dinner, 'your mashed potato mountain reminds me of the rivers and streams I study at work.' Jenny didn't know much about rivers and streams and had no idea how the two could be related. Grandpa went on to explain that a river is a large flowing body of water that flows into an ocean or lake, and a stream is a small river.

Rivers and streams can be found on most areas of the Earth. Some flow all year, while some flow seasonally or even only during years with heavy rainfall. While rivers can have different features, they all have certain things in common.

The beginning of a river or stream is called the source, where water is supplied by rain, other bodies of water, or melting snow and glaciers. Rivers form high up in mountains and start out as slow moving streams. As the water flows down the steep slopes, it begins to move quicker and forms rapids or waterfalls, which are falling water that occurs when rivers flow from a high place to a low place.

The rushing water causes erosion, which occurs when pieces of earth that have been weathered and worn away are moved to another place. Rivers can erode some landforms, like mountains, but also create others.

Rivers and streams can carry sediment, which is pieces of earth that have been broken off by erosion. The sediment is carried downhill, where it forms new landforms through the process of deposition, which happens when earth material that has been eroded is placed, or deposited, in another area.

Fast moving water deposits pebbles and larger stones, while slow moving water deposits smaller particles of sediment. The water and sediment eventually ends up on beaches and in the ocean at the mouth, or end, of the river, where it empties into another body of water, like a lake or ocean.

Rivers Create New Landforms

Through the processes of erosion and deposition, rivers and streams can drastically alter the Earth's surface. The kinds of features and landforms created depend on their slope, speed, and volume. The rushing water of rivers helps to carve new features into the surface of the Earth. One of these features is a channel , or path a river or stream follows. Channels can dry up or change course over time.

Rivers and streams can develop meanders, or s-shaped curves. The water flows fastest at the outside of the curve, where it erodes the sides of the riverbank and provides sediment. The water flows slowest at the inside of the curves, and the sediment is deposited in those areas. Rivers and streams can have just one channel, as is the case with meanders, or many channels. Braided streams are streams with many channels that overlap each other. The channels are continuously changing in a braided stream.

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how rivers and streams affect the earth's surface - video & lesson transcript | study.com

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How Rivers and Streams Affect the Earth's Surface - Video & Lesson Transcript | Study.com

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Every Sunday, Jenny looked forward to a big family dinner with her dad's famous mashed potatoes. She always liked to see how big of a mashed potato mountain she could make. Jenny loved pouring a stream of gravy over the top and watching as it flowed down the sides.

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Wind Erosion

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A new study reveals surprising information about sandstorms and their strength. CNN’s Martin Savidge reports.

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Valley of the Fossils

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Wadi Al-Hitan (Whale Valley) (UNESCO/NHK)

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Wadi Al-Hitan, Whale Valley, in the Western Desert of Egypt, contains invaluable fossil remains of the earliest, and now extinct, suborder of whales, Archaeoceti. These fossils represent one of the major stories of evolution: the emergence of the whale as an ocean-going mammal from a previous life as a land-based animal.

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Check out these images of the North End of Thompson Island

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