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Old 03-24-2006, 08:21 PM
Vegito Vegito is offline
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I need information about my science project which is "What causes landslide?"
Could someone give me some links related to the topic? My internet is REALLY slow and wont load google for some reason, and I added this site to my favorites be4 my virus came. Anyways, please someone help me get some ideas
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Old 04-02-2006, 01:20 PM
alyssaaa25 alyssaaa25 is offline
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ok i found a few so try these

[url]www.ussartf.org/landslides.htm[/url]

[url]http://landslides.usgs.gov/[/url]

[url]www.fema.gov/hazards/landslides/[/url]

i hope it is helpful
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Old 04-02-2006, 02:02 PM
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What causes landslides?

Some slopes are susceptible to landslides whereas others are more stable. Many factors contribute to the instability of slopes, but the main controlling factors are the nature of the underlying bedrock and soil, the configuration of the slope, the geometry of the slope, and ground-water conditions .
Three distinct physical events occur during a landslide: the initial slope failure, the subsequent transport, and the final deposition of the slide materials. Landslides can be triggered by gradual processes such as weathering, or by external mechanisms including:

Undercutting of a slope by stream erosion, wave action, glaciers, or human activity such as road building,
Intense or prolonged rainfall, rapid snowmelt, or sharp fluctuations in ground-water levels,
Shocks or vibrations caused by earthquakes or construction activity,
Loading on upper slopes, or
A combination of these and other factors.

Once a landslide is triggered, material is transported by various mechanisms including sliding, flowing and falling. Landslides often occur along planes of weakness that may parallel the hill slope. In bedrock, planes of weakness are usually beds, joints or fractures. Soils such as silt and clay are weaker than rock and commonly have complex or multiple planes of weakness.
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Old 04-04-2006, 01:41 PM
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Quote:
Originally Posted by brainygirl
What causes landslides?

Some slopes are susceptible to landslides whereas others are more stable. Many factors contribute to the instability of slopes, but the main controlling factors are the nature of the underlying bedrock and soil, the configuration of the slope, the geometry of the slope, and ground-water conditions .
Three distinct physical events occur during a landslide: the initial slope failure, the subsequent transport, and the final deposition of the slide materials. Landslides can be triggered by gradual processes such as weathering, or by external mechanisms including:

Undercutting of a slope by stream erosion, wave action, glaciers, or human activity such as road building,
Intense or prolonged rainfall, rapid snowmelt, or sharp fluctuations in ground-water levels,
Shocks or vibrations caused by earthquakes or construction activity,
Loading on upper slopes, or
A combination of these and other factors.

Once a landslide is triggered, material is transported by various mechanisms including sliding, flowing and falling. Landslides often occur along planes of weakness that may parallel the hill slope. In bedrock, planes of weakness are usually beds, joints or fractures. Soils such as silt and clay are weaker than rock and commonly have complex or multiple planes of weakness.
That pretty much sums it up! One thing to add, also when it...ummm...well
NVM.

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