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Geotripper: The Abandoned Lands...A Journey Through the Colorado Plateau: In death and the end of all things, there is beauty?

Geotripper: The Abandoned Lands...A Journey Through the Colorado Plateau: In death and the end of all things, there is beauty?

Sand Boil Near El Centro, 1979 Earthquake of October 15, 1979, Imperial Valley, California. A sand boil near El Centro. Such boils were found along the southern extent of the Imperial Fault. Each collapse transfers pressure from the grain groups to the water. When the pore-water pressures reach a critical level, the granular material suddenly behaves as a liquid rather than a solid. Liquefaction has taken place.

Sand Boil Near El Centro, 1979 Earthquake of October 15, 1979, Imperial Valley, California. A sand boil near El Centro. Such boils were found along the southern extent of the Imperial Fault. Each collapse transfers pressure from the grain groups to the water. When the pore-water pressures reach a critical level, the granular material suddenly behaves as a liquid rather than a solid. Liquefaction has taken place.

NaturePlus: Does anyone know what this rock is?  I found it in my garden.  The circular pattern continues through the rock.  This piece is a bit bigger than a basket ball.  Most of the rock round here is sandstone

NaturePlus: Does anyone know what this rock is? I found it in my garden. The circular pattern continues through the rock. This piece is a bit bigger than a basket ball. Most of the rock round here is sandstone

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