SOILS OF THE EASTERN UNITED STATES AND THEIR USE XXV. 



THE ORANGEBURG FINE SAND. 



GEOGRAPHICAL DISTRIBUTION. 



The Orangeburg fine sand is found in 18 different soil-survey areas 

 in 6 different States and has been mapped to the extent of 475,008 

 acres. Since only about one-seventh of the Coastal Plain area of the 

 United States has yet been covered by soil surveys, it is probable 

 that the total area of the type will ultimately aggregate 3,000,000 

 acres. 



The Orangeburg fine sand has been encountered only in soil survey 

 areas located within the Gulf Coastal Plain. No occurrences have 

 yet been found within the Atlantic region. The type is most widely 

 developed in northeastern Texas and northern Louisiana, and in 

 southeastern Alabama, southwestern Georgia, and northern Florida. 

 Tn the latter region it is found only in a belt near the Gulf, while in 

 the former region the principal occurrences are at a considerable 

 distance inland. 



CHARACTERISTICS OF SOIL AND SUBSOIL. 



The surface soil to a depth of 15 inches or more is a gray or brown 

 fine sand or occasionally a fine sandy loam. This grades downward 

 into a sticky, red, fine sandy loam which at greater depth becomes a 

 sandy clay. The total depth of surface soil and subsoil is usually in 

 excess of 40 inches. 



The Orangeburg fine sand is easily distinguished from the Norfolk 

 fine sand through the characteristic red color of its subsoil. It is apt 

 to be confused with the soils of the Greenville series, which, by 

 contrast, are red in both surface soil and subsoil, or with the Susque- 

 hanna fine sand, which, while similar in color, possesses a stiff, plastic 

 clay subsoil as contrasted with the friable sandy clay of the Orange- 

 burg fine sand. 



SURFACE FEATURES AND DRAINAGE. 



In practically all areas where it occurs the Orangeburg fine sand 

 lies at a considerable elevation and is characterized by a rolling to 

 sloping surface. 



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