january 16 2004 north carolina state industry of the future profile for mining table contents comments 1 economics 2 energy 3 employment 4 geography 5 markets figure statistics tables according to segment 6 consumption by mineral 7 distribution major crushed stone operations in sand and gravel 8 industrial minerals aggregates segments 9 requirements value 10 11 12 pcs phosphate company 13 k t feldspar imerys 14 zemex 15 unimin corporation standard inc 17 glendon pyrophyllite 18 piedmont 19 americam peat 20 olgebay norton specialty 21 chemetall foote corp 22 green thumb nc llc 23 aggregate 24 martin