Contents

• Introduction
• Bedrock
  • Stratified rocks
  • Igneous rocks
  • Structure
  • Schoodic_Peninsula
  • Isle au Haut
  • Geologic history
• Glacial geology
• Recent processes
• Conclusion
• Additional_Reading
• Glossary
• Geologic maps

Schoodic Peninsula

The southern end of Schoodic Peninsula, also part of Acadia National Park, is made up almost entirely of a fine-grained granite that is similar to that of Southwest Harbor (Figure 11).

Figure 11

Figure 12

Beautiful exposures of diabase dikes that cut the granite are present on the southern end of the peninsula. An excellent place to study the details of these dikes is at the parking area at Schoodic Point. The shore ledges are particularly interesting because you can see evidence for more than one episode of dike intrusion; you will find younger dikes cutting across older dikes, as well as fragments of older dike rock enclosed by the younger dikes. You can also see how the cracks filled by the magma taper and eventually end (Figure 12). This is one of the best places in the park to see how dikes are formed by fracturing of solid rock followed by the intrusion of magma.

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Introduction   Bedrock   Glacial   Processes   Conclusion   Reading   Glossary   Maps

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Last updated on January 11, 2008

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