626 NEW YORK STATE MUSEUM 



South, Ddkoto} 



The clays of South Dakota are classed as brick, potters', fire 

 clays, and fullers' earth. 



Brick clay. The material most commonly used for brickmak- 

 ing in South Dakota is some kind of loam such as that supplied 

 by the loess in Union, Minnehaha, and Moody co. It is also 

 thick in the high terraces along the Missouri, and Cheyenne 

 rivers, and in most of the country south of the White river, in 

 the Laramie formation, in the northwestern counties of the state. 

 Local beds are found underlying the flood plains of the large 

 streams. 



Potters' clay. Very plastic dark clays axe said to abound in 

 the Benton and the Pierre groups of the Cretaceous. 



Light colored clays abound in the White river beds, and in 

 several horizons of the Paleozoic of the South hills, which furnish 

 clays that are probably adapted to the potter's purposes. 



Fire clays. Extensive deposits of fire clay occur in the Dakota 

 formation, which forms a rim around the Black hills. This bed 

 has been worked for several years, specially at Rapid City. 



Fullers' earth. Beds of this material have been reported from 

 the vicinity of Pairbum, Custer co. 



Tennessee 



The clay resources of this state are very similar to those of 

 Kentucky. (R, T. Hill. Mineral resources, U. S. geoL.sur. 1891) 

 The Carboniferous fire clays and shales are abundant in the east- 

 ern half of the state, and pottery clays of the Eocene, and La 

 Payette formations are extensively developed in the western part. 



Around Chattanooga, there are important factories for the 

 manufacture of fire brick and sewer pipe. 



Texas 



Brick clays are abundant throughout the state. Many of the 

 Tertiary clays are suitable for drain tile and terra cotta, specially 



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1 J. E. Todd, E. and M. jour. 24 Sep., 1898. 



