Igneous Rocks (granite and pegmatite)

Most of the bedrock on Bradbury Mountain is granite, or its coarse-grained variant, pegmatite. These are igneous rocks, which means that they formed from molten rock which cooled and solidified. These particular igneous rocks cooled slowly beneath the earth's surface, which allowed the individual mineral grains to grow large. These rocks formed hundreds of millions of years ago, and during the ensuing millennia the overlying rock has been eroded to expose these deep rocks at the surface.

The following photos show features related to the rock's igneous origin.

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

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Summit Lookout    
North Bluff Lookout    
South Ridge Lookout    
Feldspar Quarry    
Igneous Rocks    
Metamorphic Rocks

Return to Bradbury Mountain Home Page (Maine Geological Survey)

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Last updated on September 3, 2008

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