Impermeable Strata of the Upper Thames Watershed 



Permeable 

 sq. miles 



Impermeable 

 sq. miles 



Totals 

 sq. miles 



77 sq. miles ' 

 13* 



120f 



256i 



804 



22 



152* 



49J sq. miles 

 47i 



7 

 29f 



H 



3881 

 128i 



■Permeable 



Impermeable 



^Permeable 



I Impermeable 



13* sq. miles j 



25 ,, rPermeable 



64f „ J 



1201 



Impermeable 



fn Thames - - 760J sq. miles 



- - 691f 



Iper Thames- - 103J 



.. - • 120f „ 



Total 1676 



6141 



1341 



103i 



>789i 



174* 



652 



5171 



^224 



1201 



petal Jurassic sq. miles, 1452 

 Total Cretaceous sq. miles, 244 



