SOIL-FORMING PROCESSES 



33 



Table III 



FRESH GRANITE AND ITS RESIDUAL CLAY 



Table IV 



VIRGINIA LIMESTONE AND ITS RESIDUAL CLAY 2 



*The percentage loss of any constituent is calculated as follows: 

 Ax 100 



= X 100 — X = % Lost. 



C 



BX- 

 D 



A = % any constituent in residual material. 

 B == % same constituent in fresh rock. 

 C = % of the constant constituent in residual soil. 

 D = % of the constant constituent in fresh rock. 

 a Diller, J. S., Educational Series of Bock Specimens; U. S. Geol. 

 Survey, Bui. 150, p. 385. 1898. 



