708 MINERALS YEARBOOK, 1967 
 
continued its basic studies of the geology and mineral resources in Edgefield,
McCormick, Newberry, Oconee, Orangeburg, and Pickens Counties. At yearend,
19 projects were active, and 11 reports were published. Geologic mapping
was in progress on the following 7½-minute quadrangles: Sumter West,
Irmo NE, Wampee, Myrtle Beach (15 minute), James Island, Lake View, Winnsboro
(15 minute), Dongola, Dovesville, Tamassee, Owdoms, Fair Play, Holly Springs,
Whetstone, Old Pickens, Seneca, and Walhalla. 
 Reports published by the Division of 
Geology during 1967 were as follows: 
"Heavy Minerals in South Carolina," 
Bulletin 35; "Geology of the Eutawville 
Quadrangle, South Carolina," MS—12; 
"Geology of the Six Mile Quadrangle, South Carolina," MS—14; and "Geologic
Notes," Volume 10, Number 4, and Volume 11, Numbers 1, 2, and 3. Other activities
reported included the magnetometer surveys of mafic volcanics and ironbearing
quartzite beds and a sampling program of bedload sediments along the Lynches
River drainage system. It was also reported that nine other investigations
were in progress or recently completed by the Department of Geology, University
of South Carolina. 
 At yearend, 372 miles, or 55 percent, of the State's total designated Interstate
Highway System was open to traffic. Work was in progress on the remaining
310 miles. 
 
REVIEW BY MINERAL COMMODITIES 
 
NONMETALS 
 
 Baritc.—Industrial Minerals, Inc., located at Kings Creek, Cherokee
County, ground imported barite for use as a rubber filler. 
 
 Cement.—Two companies, Giant Portland Cement Co., near Harleyville,
Dorchester County, and Santee Portland Cement Corp., near Holly Hill, Orangeburg
County, produced cement in South Carolina. Record production was established
for both masonry and portland cement. Masonry cement shipments increased
13 percent, and value increased 15 percent. Portland cement increased 27
percent in output and 29 percent in value. The cement industry in South Carolina
has shown continued substantial yearly growth since 1957, the first year
of pro.. duction. 
 
 Clays.—Clay production in 1967 accounted for 17 percent of the State's
total mineral value. South Carolina continued to rank second among the States
in kaolin production; output increased slightly, but value declined 6 percent
from 1966. Ten companies operated 20 mines in five counties during 1967;
leading counties were Aiken and Richland. Six companies operated 11 mines
in Aiken County, and three companies operated four mines in Richland County.
Leading producers in Aiken County were J. M. Huber Corp., Dixie Clay Co.,
National Kaolin Products Corp., Southeastern Clay Co., Cyprus 
Mines Corp., and Bell Kaolin Co. Richland County producers were Eastern Brick
& Tile Co., D. T. Duncan, and Columbia Pipe Co. Kaolin was used primarily
as rubber filler and in the manufacture of paper, paint, fertilizers, whiteware,
saggers, insecticides, firebrick, and plaster. 
 Miscellaneous clay production decreased 25 percent in quantity to 1.2 million
tons, and 23 percent in value, to $1.1 million, from 1966 figures. Fourteen
companies operated 18 mines in 14 counties; leading counties were Cherokee,
Dorchester, Greenwood, and Richland. Miscellaneous clay was used principally
in the manufacture of cement, brick, drain tile, and sewer pipe. 
 
 Feldspar.—Spartan Minerals Co. continued production of a feldspar-silica
mixture from the granite fines at the Campbell Limestone Co. Pacolet quarry
in Spartanburg County. The material was ground and shipped out of State for
use as a rubber filler and in the manufacture of glass and pottery. 
 
 Kyanite.—Commercialores, Inc., continued production of kyanite at
the Henry Knob mine in York County. The material was used in the manufacture
of refractories. 
 
 Lime.—Regenerated or recirculated lime was produced by four companies
for use in paper manufacture and pulp processing. Production in 1967 was
314,000 tons