Slate Islands Provincial ParkVisiting Attractions Slate Islands Provincial Park
Going to the Slates
Boreal Woodland Caribou & Wildlife
Creation of the Slate Islands
The Slate Islands are believed to have formed almost 1 billion years ago when a 3 km-wide (1.9 miles) meteorite struck the area creating a 32 km (19 miles) wide impact zone. The impact uplifted a large portion of the land that later formed the Slate Islands. With the sudden and massive release of energy—like those from the meteorite or even nuclear explosions—the shock waves gave way to a very large shatter cone on the Slates, reaching up to 10 m (33 ft.) high—one of the largest in the world! NASA speculates that the shatter cones around the archipelago are a strong indication that a massive collision likely occured, reinforcing the theory of a large meteorite impact having formed the Slates.
To see one of the largest shatter cones (directly above, second picture from the right) in the world, head over to McGreevy Harbour on the islands.
2. Andrews, Phil. “NASA Studies Meteor Site.” The Chronicle Journal [Thunder Bay] n.d.: n. pag. Print.
3. Dressler, B. O., V. L. Sharpton, B. Schnieders, and J. Scott. New Observations at the Slate Islands Impact Structure, Lake Superior. Rep. no. NASA-CR-205312. NASA, 1 Jan. 1995. Web. 24 Nov. 2016.