150 THE STORY OF THE EARTH. 



in the bottom beds of the red limestone include 

 the same Gault species as are found in the top 

 beds of the underlying clay. 



A similar transition in physical character is 

 seen in Norfolk from the brown sands, locally 

 termed Carstone at Hunstanton, to the sandy 

 Hunstanton limestone which there rests upon it. 

 This succession has sometimes led to the belief 

 that the upper part of those sands is of the age of 

 the Lower Gault. 



JUit while there is an apparent conformity of 

 the Cretaceous to the Neocomian beds on the east 

 Coast of England, at Speeton there was a manifest 

 change in the tilt of the land further west, which 

 caused the sea at that time to extend over the 



edges of the 

 older Secon- 



& ^ \ >U^^ W c * ar - v stI *ata. 



This is seen in 

 land in the 

 district which 

 is now East 

 Yorkshire by 

 the deposit of 

 the Hunstan- 

 ton limestone 



--oi-Ui/-. '^ which cox 



a& -Ammonites Deshayesii, from Dear \\w edflfes ^( 

 I the Lower Greensand, Ather- .1 



the litic 



recks. There 



appears to have been a similar depression of land 



at the same time to the west, in Dorsetshire and 



D< }hire, Which resulted in the ili-position of 



Is, known as the />'/,/, ver 



th<- whole ol the Lo? Its, and 



partly upon the ( larboniferous rocks about Exel 



