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The Great Dikes

The Great Dikes of Spanish Peaks Country formed during the same period of volcanic activity as the Spanish Peaks, Mt. Mestas, and Silver Mountain. These vertical granite formations were formed by molten rock several thousand feet underground, below and among many layers of sedimentary rock. Over time, the ground rose and the softer rock eroded [...]

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The Spanish Peaks

The Spanish Peaks are geologically distinct from the faulted and uplifted mountains of the Sangre de Cristo range to the west. To the geologist, the Spanish Peaks are prime examples of stocks—large masses of igneous rock layered by sedimentary rock and exposed by erosion. Stocks 27 million years ago, pressures and stresses built up by [...]

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