378 
MINERALS YEARBOOK, 1967 
 
ment plants in early 1968 due to obsolescence and low profit margin. The
plant at Lake Charles was one of the affected plants. Overall, the Lousiana
cement industry operated at about 85 percent of capacity during the year.
Dundee Cement Co.'s new distribution and service center was opened in May
at New Orleans. The terminal is adjacent to the Michoud Canal, near the Gulf
Intracoastal Waterway, and has six circular silos with barge and rail unloading,
and truck loading facilities. 
 
 Clays.—Production was down slightly from 1966. Seven brick companies
at eight plants, two lightweight aggregate companies, and four cement plants
used clay in 13 parishes. 
 The Louisiana Geological Survey published a report ~ that compiles existing
miscellaneous previously unpublished data on the occurrence and evaluation
of clays in Louisiana. Data from tests made in past years by the Federal
Bureau of Mines for the Louisiana Geological Survey represent a sizable portion
of this report. 
 
 
Table 16—Miscellaneous clay sold or used 
by producers 
(Thousand short tons and thousand dollars) 
 
Year Quantity 
 
Value 
1963                      
655 
$655 
1964_.~....             
780 
797 
1965_~ ..         
909 
936 
1966_                    
1967                      
1,005 
995 
983 
1 260 
 The Louisiana Geological Survey continued a joint program with the Federal
Bureau of Mines in making a statewide survey of Louisiana clay types and
reserves. 
 
 Gypsum.—Winn Rock, Inc., Winn Parish, mined crude gypsum for use as
retarder in portland cement. National Gypsum Co. at Westwego and United States
Gypsum Co. at New Orleans calcined imported crude gypsum and manufactured
plaster, lath, and wallboard. Georgia Pacific Corp. at New Orleans closed
its caicining plant at the end of 
1966. 
 
 Lime.—Lime production was down 9 percent from 1966 levels. Four companies
produced lime—Olin Mathieson Chemical 
Corp. in Calcasieu Parish and Allied Chemical Corp. in East Baton Rouge Parish
produced lime for their own use; United States Gypsum Co. in Orleans Parish
and Pelican State Lime Co. in St. Mary Parish produced primary lime from
oystershell for sale on the open market. The lime was used principally at
chemical and industrial plants and for refractories. Regenerated lime for
use in paper and pulp was produced by five companies at six plants as follows:
Calcasieu Paper Co., Allen Parish; Olin Kraft, Inc., Ouachita Parish; Continental
Can Co., Inc., Jackson Parish; Internationl Paper. Co., Morehouse and Webster
Parishes; and Crown Zellerbach Corp., Washington Parish. Regenerated llime
production in 1967 was 457,000 short tons (451,000 in 
1966). 
 
 Salt.—Louisiana was the Nation's leading salt-producing State. Demand
for all types of salt—evaporated, rock, and brine 
---showed substantial increases, although increased consumption of rock salt
accounted for 80 percent of the gain. Evaporated and/or rock salt was produced
by six salt companies; brine was produced by seven chemical companies. Salt
was used in tanning, food processing, manufacture of rubber, paper, chemicals,
livestock feed, snow and i-ce removal, and numerous other industrial applications.

 
 Sand and GraveL—Production was 20.3 million tons (9 million tons of
sand and 11.3 million tons of gravel), about 11 percent more than in 1966.
Processed sand and gravel amounted to 19.9 million tons or 98 percent of
the total. Sand use was as follows: Building sand, 57 percent; paving sand,
40 percent; industrial, other construction and fill sand, 3 percent. Gravel
use was as follows: Building gravel, 54 percent; paving gravel, 44 percent;
other construction and fill gravel, 2 percent. A total of 96 sand and gravel
operations was reported in 21 parishes. 
 The Louisiana Geological Survey continued a study of Louisiana sands from
the standpoint of suitability for industrial use—glass manufacture,
foundry sand. etc. The study will be expanded to include detailed work on
the Sparta Formation in north Louisiana. Results will be published when the
study is complete. 
 4 Louisiana Geological Survey. Clay Resources of Louisiana-Test Data and
Evaluation of Miscellaneous Clays. Clay Resources Bull. 1, 1967.