490 



mckelvey. SEDIMENTARY MINERAL DEPOSITS 



LCh. 27 



TABLE 2 (Continued) 

 I C. Continued 



Sandstone 



Building stone 



Curbing 



Flagging 



Grindstones 



Millstones 



Pulpstones 



Sharpening stones 



Ground sand and sandstone 



Abrasive 



Enamel 



Filler 



Foundry '. 



Glass 



Pottery, porcelain, and tile 



Miscellaneous 



Crushed and broken sandstone 



Concrete and road metal 



Railroad ballast 



Refractory stone (ganister) 



Riprap 



Miscellaneous (including sandstone for concrete 

 blocks, filter stone, poultry grit, rock wool, roof- 

 ing granules, spalls, stone sand, chemical use, 

 etc.) 



1,780,000 



86,000 



463,000 



501,000 



None 



4,000 



X 



629,000 

 168,000 

 205,000 

 514,000 

 365,000 

 1,710,000 

 540,000 



1,830,000 

 315,000 



2,950,000 

 654,000 



3,330,000 



Total value of production of quartz sand and sandstone. . . $ 91,000,000 



D. Clay and shale 



Ball clay 



Kaolin 



Fire clay (including stoneware clay) 



Bentonite 



Fuller's earth 



Miscellaneous clays (including slip clay and shale) .... 

 Bauxite 



Total value of clay and shale 



E. Miscellaneous 



Pumicite 



Total value of production of miscellaneous detrital sedi- 

 ments 



$ 2,400,000 

 12,000,000 ?? 

 15,800,000 ?? 

 4,360,000 

 3,700,000 

 10,000,000 

 6,000,000 ?? 



$ 54,300,000 



820,000 ?? 



820,000 



