Crude Prepared Total 
County 
 Short tons Value Short tons Value Short tons Value 
 
Inyo                                     
Kern                    
Lake                    
Lassen                   
Madera                                   
W 
W 
25,000 
$11,454 
 W 
25,000 
W 
W 
W 
W 
W 
W 
W 
W 
W 
W 
 W 
 W 
93,760 
25,000 
 W 
 W 
$11,454 
211,407 
25,000 
 W 
Modoc                   
Mono                    
320,322 
 W 
320,322 
 W 
10,313 
W 
320,322 
10,313 
320,322 
 W 
Napa                    
San Bernardino 
Shasta                   
648 
           
57,059 
1,200 
 
76,699 
17,444 
817 
$17,951 
1,591 
648 
17,444 
57,876 
1,200 
17,951 
78,290 
Siskiyou                  
Tehama                  
Undistributed             
284,620 
6,264 
48,958 
286,691 
6,396 
71,520 
17,820 
  
77,109 
45,100 
 
493,528 
302,440 
6,264 
32,307 
331,791 
6,396 
353,641 
THE MINERAL INDUSTRY OF CALIFORNIA 
 
 
Table 12.—Pumice 1 sold or used by producers in 1967, by counties 
 153 
 Total 742,871 799,282 123,503 558,170 866,374 1,357,452 
 
 
W Withheld to avoid disclosing company confidential data; included with "Undistributed."
1 Includes pumicite and volcanic cinder. 
 
 
consumers in California although significant quantities were exported to
Japan and Canada, and shipped to Arizona, Nevada, Oregon, and Washington.

 
 Sand and GraveL—Production of sand and gravel was about 4.6 million
tons less than in 1966. The decline occurred in southern California—over
4 million tons in Los Angeles County alone—and was attributed entirely
to reduced building construction. Output in northern California rose about
430,000 tons to supply the requirements for construction of freeways, a section
of the Bay Area Rapid Transit system in Alameda County, Bullards Bar Dam
in Yuba County, and resorts in the Lake Tahoe area. 
 The total value of the overall output remained virtually unchanged from
1966. The unit value increase of $0.05 per ton was attributed to a lower
volume of base and fill material and a higher cost for specification materials
used in the construction of sections of Interstate Highways 5 and 8. 
 Sand and gravel was produced in all 
58 counties, and output ranged from 
40,000 tons in Solano County to over 22 
million tons in Los Angeles County. Eight 
counties—Alameda, Fresno, Los Angeles, 
Orange, Riverside, Sacramento, San Bernardino, and San Diego—yielded
more than 
5 million tons each. 
 Of the 381 sand and gravel operations 
classified as commercial, 21 produced over 
1 million tons each; 32 produced between 
500,000 and 1 million tons each; 125, be- 
tween 100,000 and 500,000 tons each; and 201, less than 100,000 tons each.
Over 82 percent of the total output was supplied by commercial producers,
other than government crews, and onsite contractors. 
 Production of ground and unground industrial sands increased slightly above
1966 figures, particularly for glass manufacture and industrial fillers.
A lower output was reported for blast, molding, engine, and filtration uses.

 
 Sodium Compounds.—Sales of sodium compounds were below the 1966 figures.
A decline in sales of sodium carbonate more than offset an increase reported
for sodium sulfate. Soda ash and sodium sesquicarbonate were recovered from
the brines of Owens Lake, Inyo County, by Pittsburgh Plate Glass Co.; byproduct
salt cake was produced by United States Borax & Chemical Corp. in its
Wilmington refinery, Los Angeles County, from crude borates mined by the
company in Kern County; and American Potash & Chemical Corp., division
of Kerr-McGee Corp., and Stauffer Chemical Co. each produced soda ash and
salt cake from Searles Lake brines, San Bernardino County. Stauffer also
produced Glauber's Salt at its Searles Lake plant and recovered byproduct
anhydrous sodium sulfate from purchased Kern County borates in its San Francisco
facility. 
 
 Stone.—Stone production was down nearly 14 percent from that of 1966.
The drop was attributed largely to lower requirements for miscellaneous stone
used for