394 
MINERALS YEARBOOK, 1967 
 
and one dredge in commercial operation. The remaining operations produced
unprocessed sand and gravel. One stationary plant and one portable plant
produced Government-and-contractor sand and gravel. The leading counties
in sand and gravel production were 
Prince Georges, Anne Arundel, Baltimore, Charles, and Cecil; each produced
over 1 million short tons. The chief uses of sand and gravel were for structural
concrete, roadbuilding, and fill. 
 
Table 5.—Sand and gravel sold or used by producers, by classes of operations
and uses 
(Thousand short tons and thousand dollars) 
Class of operation and use 
 1966 1967 
Quantity Value Quantity Value 
 
Commercial operations: 
 
 
Sand: 
 
 
Structural_.                                  
Paving                                     
Other'                                     
 
Total                                     
 
Gravel: 
3,874 
1,860 
2,303 
 $5,256 4,130 $5,306 2,758 1,900 2,711 2,239 453 976 
 
8,037 
 10,253 6,483 8,993 
 
 
 
Structural                                   
Paving                                     
Fill                                        
2,907 
2,524 
549 
 5,438 2,724 4,971 3,311 2,267 2,931 327 823 509 
Other2                                     
 
Total                                    Total sand and gravel          
             
 
Government-and-contractor operations: 
822 
 966 340 202 
 
6,802 
 10,042 6,154 8,613 
 
14,839 
20,29512,63717,606 
 
 
 
Sand                                          
6 
2 41 15 
Gravel                                         
 
Total sand and gravel                           
 
All operations: 
Sand                                          
263 
86 190 103 
 
269 
88 231 118 
 
8,043 
 10,255 6,524 9,008 
Gravel                                         
7,065 
 10,128 6,344 8,716 
TotaL._                                      
15,108 
 20,383 12,868 17,724 
' Includes sand for glass, grinding and polishing (1967), fill, and other
uses. 2 Includes miscellaneous gravel, and other uses. 
 
 Stone.—Stone remained the leading commodity in value. Sales increased
about 5 percent over those of 1966. The output was comprised of basalt, granite,
limestone, marble, oystershell, sandstone, and miscellaneous stone. Production
was reported from 12 counties. The two leading producing counties were Baltimore
and Frederick, which together accounted for 43 percent of the State's total
output. Thirty-eight quarries operated during the year. Of the total stone
production, 68 percent was crushed limestone, which accounted for 63 percent
of the value of all stone sold. About three-fourths of the crushed limestone
produced was used in concrete and roadstone. Crushed sandstone, some of which
was sold as ganister, was produced in Carroll and Cecil Counties. Dimension
sandstone 
produced in Baltimore and Garrett Counties was sold for use as flagging,
for rough construction, and as sawed stone. Basalt was quarried in several
counties and was sold for use principally as roadstone and for concrete.
Two operators in Cecil County reported production of crushed granite. Marble
was quarried in Harford County, and was used for terrazzo chips. 
 
 Talc and Soapstone.—Talc was produced in Harford County and was used
in ceramics, and in the manufacture of foundry facings and toilet preparations.
Production of soapstone was reported from Carroll County. The commodity was
ground and sold for use chiefly as roofing granules, as filler for asphalt,
and in foundry facings.