no 



Vill 



ages 



themselves; the Hatley's and the Gransden's to the west belong also to 

 this category. 



(2) With a west-to-east dip, the lower limit of the Chalk (i.e. the 

 spring-line) is at a higher level than in the east of the County. To some 

 extent, it coincides with the 100 ft. contour, but it does rise to 200 ft. 



Fig. 25. 

 Villages to the west of Cambridge. 



Following interrupted outcrops of the Chalk, along the eastern and 

 southern edges of the plateau, are the villages of Madingley, Coton, 

 Barton, the Eversden's, Harlton, Haslingfield, Barrington, Orwell, 

 Arrington, and Croydon. 



(3) In the north, the village sites still follow the 100 ft. contour, which 

 roughly marks the junction between the Boulder Clay and a varied series 

 of Gault, Lower Greensand, Kimeridge Clay, and Ampthill Clay. It is 

 interesting to note that these upland villages lie off the Via Devana. 



