Propeller Buster

View towards the Black Bay shore.

This partially submerged gravelly ridge snakes its way from the mainland to an island perhaps a mile offshore on Lake Superior's Black Bay a few miles north of the Pearl River mouth. At times there are waves rolling onto the ridge from both the north and the south simultaneously. In places where the ridge is submerged under several inches of water, the colliding waves create a chaotic pattern of dancing water on the surface. Due to the low water level of Lake Superior, much of the ridge is presently visible, but in years past, lurking just below the surface, it must have chewed up numerous propellers of unwary boaters. Could this phenomenon be the result of the winds being channelled in different directions in Black Bay, or is it an esker created during the last ice ace? Guesses or comments, anyone?

Some of the ridge is visible in the distance near the island.
The mountains in the background are the Paps on the Black Bay Peninsula.