402 H. A. Baker — Charnian Movement in East Kent. 



the south-east of this area there is, in all probability, another where 

 a Lower Greensand overlap occurs, since at Mattice Hill the Wealden 

 is but 2 feet thick. In relation to the alleged easterly Charnian 

 ridge, this area on the Kentish coast immediately to the south-east 

 of the Mattice Hill boring is in parallelism with the boring at 

 Culford in Essex, where the Lower Greensand overlap has been 

 demonstrated. Doubtless, further south-east, beneath the waters of 

 the Straits, there occurs an overlap of the Gault upon the Palaeozoic 

 floor in parallelism with the proved overlap at Harwich, Stutton, 

 and Weeley. 1 On the south-easterly extension of the ridge, in North 

 France, there occurs an area where an overlap of the Middle Chalk 

 upon the Palaeozoic floor exists. Apparently the ridge attained its 

 greatest elevation to the south-east. 



With regard to the isopachyte systems of the Cretaceous members 

 of the Mesozoic cover, it is only to be expected that the intervention 

 of a wedge-like mass of older Mesozoics,and the interference introduced 

 by the Armorican movement, would mask to a large extent the 

 relationship so readily traceable between the isopachytes of these 

 older strata and the contours of the Palaeozoic ridge. Nevertheless, 

 in spite of these disturbing elements, it is still possible to perceive 

 the influence of the ancient ridge. 



In the opinion of the writer the South-East of England furnishes 

 much evidence suggestive of Charnian posthumous movement, and 

 that afforded by East Kent is a significant contribution. 



Table I. 



1 The Gault overlap has been proved in a deep boring at Calais. 



2 Estimated. 



I 



