Interesting liquefaction video:
http://www.youtube.com/watch?v=tvYKcCS_J7Y
[YOUTUBE]tvYKcCS_J7Y[/YOUTUBE]
And for those of you who, like myself, had never heard the term before the earthquakes this is what it means:
Further description here:Quote:
Soil liquefaction describes a phenomenon whereby a soil substantially loses strength and stiffness in response to an applied stress, usually earthquake shaking or other rapid loading (force), causing it to behave like a liquid.
The phenomenon is most often observed in loose sandy soils.
http://en.wikipedia.org/wiki/Soil_liquefaction