72 Atlantic and Gulf Coastal Plains Soils. 



and underlain by blue or gray clay. Occupies level or gently roll- 

 ing country, usually prairie, and owes its origin to Cretaceous sedi- 

 ments. Cracks in summer, but is very plastic when wet. Cotton 

 principal product. Adapted to stock raising. Corn and oats do 

 well. 



12 3 4 



Soil (6) • 7 16 52 24 



Subsoil(6) 2 11 45 42 



Acres. 



Paris, Tex 40, 064 



Perry County, Ala 136, 128 



Houston black clay. — Drab to black clay, 4 to 6 inches deep, fria- 

 ble when well cultivated, but becoming waxy and sticky when 

 wet, and if not continually cultivated caking into a very hard and 

 compact mass that cracks into irregular blocks on drying. Sub- 

 soil a waxy, very stiff, and tenacious clay of same color as soil. 

 Both soil and subsoil contain varying quantities of lime concre- 

 tions, ranging generally from 1 to 10 millimeters in diameter, but 

 frequently larger. Pockets of quartz are also found, and pockets 

 of the drab soil in the black, and vice versa. Very fertile soil. 

 Used, commonly for corn, cotton, and rice according to locality, 

 elevation, and drainage. Adapted also to grass. 



1 2 :j 4 



Soil (9) ' 2 21 46 28 



Subsoil (9) 2 13 48 32 



Acres. 



Brazoria, Tex 272, 276 



Paris, Tex 35, 008 



Willis, Tex " 20, 480 



VERNON SERIES. 



Vernon sand. — A loose, incoherent sand of medium texture, 

 about 18 inches deep, underlain by a looser and coarser material. 

 In color it ranges from a yellow in its least typical phase to a red- 

 dish-brown where, on the upland, it contains some organic matter. 

 The river-flat phase contains a little silty material. The upland 

 phase is at times slightly sticky, probably from the presence of 

 lime carbonate. The U])land areas are always well drained. 



a Mapped as San .lacinto clay, whicli name will not be used hereafter. 



