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Cordillera Provinces

Cordillera Provinces. Geology of National Parks. Rocky Mountain System. Isostasy At Work. Isostasy states that differences in elevation are compensated for by low-density roots Imagine a sponge floating in water

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Cordillera Provinces

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  1. Cordillera Provinces Geology of National Parks

  2. Rocky Mountain System

  3. Isostasy At Work • Isostasy states that differences in elevation are compensated for by low-density roots • Imagine a sponge floating in water • Part of the sponge floats above the level of the water-it has positive elevation • Compensating that elevation is a low-density root-the portion of the sponge below the water (sponge is less dense than water)

  4. Isostasy • Wood block is denser than foam, so more of the wood is submerged

  5. Loading and Unloading • Crustal loading, as by ice, water, sediments, or volcanic flows, leads to isostatic depression or downwarping; removal of load, to isostatic uplift or upwarping

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