PROCEEDINGS OF THE COTTESWOLD CLUB 63 



Basin of the Windrush 

 including the sub-basln of the dickler* 



The Windrush is one of the most important tributaries 

 or confluents to the Upper Thames, having a drainage area 

 of 147^ square miles, including in this its tributary the 

 Dickler. 



The Windrush receives in its course of 30 miles a large 

 supply of water from four groups of the Jurassic Rocks — 

 ranging from the Lower Lias to the Oxford Clay, viz. : 

 rThe Lower Lias - - 9 square miles 



„ Middle „ - - 4% 



G'^^^P ^ I „ Upper „ Clay - 8^ 

 [ „ ,, „ Sands 7 



„ Inferior Oolite - 59 



„ Fuller's Earth - 5^ 



„ Great OoHte - 24^ 



„ Forest Marble - 8 



,, Cornbrash - - 5/^ 



„ Oxford Clay - -16% 



The Windrush has its source on the north-eastern 

 slopes of the high ground, south of Snowshill, imme- 

 diately below the line of the watershed, rising at 

 Taddington, one mile above Cutsdean ; a second and 

 lower branch rises at Bradwell s Head, a third branch rises 

 at the divide in Pinnock Wood. The junction of these 

 streams meets at Guiting Power, passing over a broad 



* The rapidly running stream of Eyeford, a branch of the Dickler, rises in a Lias 

 Valley amidst the faults east of Naunton, unwatering a large expanse of Inferior Oolite 

 above Swellwold Harm and Condicote. The Dickler rises at Campoden Ashes, falling 

 south to Upper Swell in a well defined Lias Valley for five miles, then entering the 

 Lower Lias Valley to Newbridge (five miles) then joining the Windrush from 

 Ron rton -on -the -Water . 



