THE OEIGIN OF SOILS 



47 



Carboniferous 



Coal Measures 



Mfllstone Grit 



Yoredale Rocks 



Carboniferous 

 Limestone 



l . 1 



I., I 



1,1', I 



It I 



'.'I 



' . ' 



Devonian 



FlG. 4A. 



