North Mountain Look-off — The Aspy Fault

North Mountain Look-off is a roadside viewpoint and geology stop on the Cabot Trail, looking into the wooded Aspy Fault valley. It fits as a short pause if you want to see how the highlands were shaped; interpretive panels introduce the fault at the pull-off.

The Aspy Fault runs about 40 kilometres from the highlands to the ocean. The Aspy River follows it through a canyon visible from the Cabot Trail. Here, the broad valley is the best way to picture the fault: it is a long break in the landscape, not a clean crack in exposed rock. When autumn colour is out, include both forested slopes in a photo to show the valley's width.

The fault probably formed when continental plates collided and pushed seafloor upward to help build the Appalachians. It may once have connected with Scotland's Great Glen Fault before the Atlantic opened.

Farther along the fault at the coast, a wave-cut platform from about 120,000 years ago is offset roughly 17 metres. That measurement is not a feature to pick out from this roadside view, but it shows how the fault's geology reaches beyond the valley in front of you.

This is a roadside turnout on Nova Scotia Route 30. A Parks Canada pass is required to tour the section of the Cabot Trail that runs through the national park. The panels are a useful introduction to the geology; look across the valley as you read them to connect the explanation with the landscape.