ABSTRACT This annual meeting of the North-Central Section of the Geological Society of America provides an opportunity to visit a working underground salt mine on a field trip. The trip leaders will take a group into the Detroit Salt Mine, which is located approximately 1200 ft (364 m) deep beneath a portion of the city of Detroit, Michigan. This mine extracts salt through a room and pillar mining process from the Silurian Salina "F" Salt formation. Currently the mined salt is used primarily as crushed salt for ice control throughout the upper Midwest. The company is mining a 30-ft-thick seam of bedded halite. Thin beds of anhydrite and/or dolomite are occasionally interbedded with the high-purity halite.