BOULDER-CLAYS OF LINCOLNSHIRE. 



115 



Pig. 1. — SJcetch-Map of Lincolnshire, showing the range of the Boulder- 

 clays: reduced from the mxps of the Geological Survey. (Scale 

 about 12 miles to an inch.) 



:":::'i::^::^ Marsh and Fen. 



ji, Chalky Clay. ^^^ Hessle Clay . 



