B. Manufacturing 

C. Agriculture 

D. Forestry

E. Shipping 

F. Recreational opportunities

G. Mining

economically valuable deposits
copper and copper mining
       copper and copper mining part I
       copper and copper mining part II
              FEATURE: Working in the mines
              FEATURE: Maps of copper mines
             FEATURE: Could Michigan copper have been traded worldwide in the Bronze Age?
iron mining
       iron mining part I
       iron mining part II
       iron mining part III
       iron mining part IV
              FEATURE: The Tilden open-pit iron mine
              FEATURE: Ishpeming and Negaunee
Iron Ranges of the UP
       Marquette Iron Range
       Gogebic Iron Range
       Menominee Iron Range
diamonds and kimberlites?
Michigan's (small) gold rush
limestone and limestone mining
       FEATURE: Calcite quarry at Rogers City
       FEATURE: The Alpena Cement Factory
hydrocarbons (oil and gas)
       hydrocarbons part I
       hydrocarbons part II
              FEATURE: Pinnacle reefs
salt
       salt mining: the geology part
       salt mining: the mining part
       salt brines
              FEATURE: The story of Dow Chemical
              FEATURE: Brine/bromine mining....big business!
gypsum and gypsum mining
Portland cement
low-grade coal
shale and clay
sand and gravel (aggregate)
sand and sand mining
       sand mining part I
       sand mining part II
building stone