slopesystems - Slump: when blocks of materials slide, very...

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Slump: when blocks of materials slide, very common Slump block o Usually spoon shaped slippage plane o Block moves downward and outward o Usually have multiple slippage planes o Bedding plane displacement provides Landslides o Well-defined slippage plane o Moves as a single unit or group of units o Rock type, orientation and water content influence events Mudflows o Flows consisting of slit/clay sized particles Usually associated with heavy rain High water content-up to 30% Usually flow down stream valleys Debris flows o Mixtures of water, mud, and rock o Liquefied soil flows downhill Up to 50km/hr o Water lubricates mass of soil and rock o Large boulders, building etc may be carried by viscous fluid Lahars: volcanic debris flows o Common is loose pyroclastic material o Rain or melting snow saturates soil and rock o Explosive eruptions and associated earthquakes can be triggers o Very fast flowing-up to 150km/hr o Extremely dangerous, especially if ash is hot, cannot outrun
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slopesystems - Slump: when blocks of materials slide, very...

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