Crushed Stone Sold Or Used In The United States, By Type

TABLE 2
CRUSHED STONE SOLD OR USED IN THE UNITED STATES, BY TYPE^{1, 2}

	2006^r				2007
		Quantity				Quantity
	Number	(thousand	Value	Unit	Number	(thousand	Value	Unit
Type	of quarries	metric tons)	(thousands)	value	of quarries	metric tons)	(thousands)	value
Limestone³	2,102	1,120,000	$8,420,000	$7.52	2,123	1,020,000	$8,280,000	$8.13
Dolomite	134	78,000	575,000	7.38	137	72,500	562,000	7.75
Marble	21	7,900	77,600	9.83	21	7,580	71,100	9.38
Calcareous marl	4	2,750	10,500	3.81	3	2,820	18,800	6.68
Shell	5	8,640	73,900	8.55	5	2,850	24,200	8.47
Granite	389	270,000	2,620,000	9.71	384	241,000	2,620,000	10.88
Traprock	331	120,000	1,130,000	9.43	361	105,000	1,030,000	9.82
Sandstone and quartzite⁴	175	53,900	414,000	7.68	188	47,700	398,000	8.35
Slate	34	4,710	43,900	9.33	33	3,820	37,000	9.68
Volcanic cinder and scoria	45	6,190	41,100	6.64	46	6,630	48,800	7.36
Miscellaneous stone	460	97,600	806,000	8.26	435	94,100	781,000	8.30
Total or average	XX	1,770,000	14,200,000	8.04	XX	1,600,000	13,900,000	8.66
^rRevised. XX Not applicable.
¹Data are rounded to no more than three significant digits, except unit values and number of quarries; may not add to totals shown.
²Does not include American Samoa, Guam, Puerto Rico, and the U.S. Virgin Islands.
³Includes limestone-dolomite reported with no distinction between the two kinds of stone.
⁴Includes sandstone-quartzite reported with no distinction between the two kinds of stone.