325 



RECENT EXPOSURES OF GLACIAL DRIFT AT 

 DONCASTER AND TICKHILL* 



H. CULPIN AND G. GRACE, B.Sc. 



The Doncaster district has long- been noted for a remarkable 

 deposit of stiff boulder-clay which covers about 125 acres south 

 of the river Don, one-and-a-half miles south-west of Doncaster. 

 Two miles to the north-west, near Cusworth Park, on the north 

 side of the Don, numerous Lake District and Carboniferous 



GLACIAL DEPOSITS 



NEAR 



DONCASTER 



RIV. IDLE 



WAD WORTH 



TICKHILL 



I Equals Permian rocks. 



S Equals Boulder clay. 



erratics are scattered on the surface of the fields, but there is no 

 exposure of clay. The distribution of the Balby clay and the 

 Cusworth erratics is roughly fan-shaped, the Don gorge forming 

 the handle of the fan. 



In the sinking- of the Bentley pit, two miles north of Don- 

 caster, boulder-clay has recently been passed through at a 

 depth of 55 to 75 feet below O.D. This clay lies on Bunter 



* Paper read to Section C at a Meeting- of" the British Association, York. 



1906 September i. 



