Gypsum processing near Flat Bay, western Newfoundland.
Gypsum is a soft, white mineral consisting mainly of calcium sulphate formed in hot climates during the evaporation of sea water. Gypsum from the Flat Bay deposit in western Newfoundland is used in the manufacturing of gyproc wallboard and cement in Corner Brook and is also exported to the United States.

From Geological Survey of Newfoundland and Labrador - "Geology and Geological Features - Mineralization" and "Aspects of Mining in Newfoundland and Labrador: Production." http://www.gov.nl.ca/mines&en/geosurvey/. Courtesy of David Liverman, Government of Newfoundland and Labrador.