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Flood Basalts 
The low viscosity of basalt allows it to flow easily and when extruded in significant enough quantities can create large sheets of what is called a flood basalt. There are many examples of flood basalts around Colorado. Some of the more well known are Grand Mesa, the Flat Tops, White River Uplift, and Raton Mesa.

Below: Indicated with a red arrow are the approximately 23 Ma basalt flows of the Flat Tops.

 Basalt flows of the Flat Tops

 Colorado Geological Survey
Last Updated: 1/25/2013 8:42 AM 
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