This image shows the extensive dolomite quarry works on Drummond Island, Michigan, and the ferry dock at the far left.
The description states:
Showing the Dolomite Quarry on the right, and the ferry landing on the left. Drummond Island, Michigan.
—Dolomite is used for many purposes, including as a source of limestone in home gardening and the production of float glass. This image is dated 1961.