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| TABLE 18 | ||||||||||||||||
| U.S. IMPORTS OF CRUSHED STONE AND CALCIUM CARBONATE FINES, BY TYPE1 | ||||||||||||||||
| 2006 | 2007 | |||||||||||||||
| Quantity | Quantity | |||||||||||||||
| (thousand) | Value, c.i.f.2 | Unit | (thousand) | Value, c.i.f.2 | Unit | |||||||||||
| Type | metric tons) | (thousands) | value | metric tons) | (thousands) | value | ||||||||||
| Crushed stone and chips: | ||||||||||||||||
| Limestone | 9,180 | $72,200 | $7.87 | 9,510 | $72,700 | $7.64 | ||||||||||
| Limestone for flux or cement manufacturing | 3,270 | 32,000 | 9.78 | 2,870 | 31,100 | 10.83 | ||||||||||
| Quartzite | 21 | 3,090 | 147.14 | -- | -- | -- | ||||||||||
| Other | 7,350 | 98,100 | 13.34 | 7,120 | 107,000 | 15.04 | ||||||||||
| Total or average | 19,800 | 205,000 | XX | 19,500 | 211,000 | XX | ||||||||||
| Calcium carbonate fines:3 | ||||||||||||||||
| Natural chalk | (4) | 15 | 66.67 | 7 | 228 | 32.57 | ||||||||||
| Calcium carbonates, other chalk | 1 | 456 | 533.96 | 1 | 1,170 | 971.71 | ||||||||||
| Total or average | 1 | 471 | XX | 8 | 1,400 | XX | ||||||||||
| Grand total or average | 19,800 | 206,000 | XX | 19,500 | 212,000 | XX | ||||||||||
| -- Zero. XX Not applicable.��� | ||||||||||||||||
| 1Data are rounded to no more than three significant digits, except unit value; may not add to totals shown. | ||||||||||||||||
| 2Cost, insurance, and freight value. | ||||||||||||||||
| 3Excludes precipitated calcium carbonate. | ||||||||||||||||
| 4Less than � unit. | ||||||||||||||||
| Source: U.S. Census Bureau. | ||||||||||||||||
Source: United States Geological Survey Mineral Resources Program