336 MINERALOGY 



dissolve the carnallite; on recrystallization the salts separate as 

 sylvite and kainite. 



The carnallite beds are at the top of the Stassfurt deposits and 

 represent the last products of deposition from the brines. Here 

 it is mined in large quantities, and together with kainite is the prin- 

 cipal source of the quantities of potassium used as fertilizers. 



