Joints sets in granite, Acadia National Park

These outcrops along the shores of Acadia National Park in Maine are all formed from a reddish granite. Clearly it is broken up by joints. You should note and trace the different joint sets. Notice also whether the joints are evenly spaced or clustered.

Questions that may be raised here include the following. What are the angles between the different sets, and which sets might be linked in some way, and which may be independent of the others? Which of these joint sets might be of greatest concern if building a road along the coast and why?

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