Ch. XXII.] 



VALLEY OF 1 KINGSCLERE. 



305 



On the other hand, the green-sand and chalk, as they ap- 

 proach the central axis of the Weald, are not found to contain 

 littoral shells, or any wreck of the fresh-water strata, such as 

 might indicate the existence of an island with its shores or 

 wasting cliffs. Had any such signs been discovered, we might 

 have been inclined to suppose the geography of the region to 

 have once borne some resemblance to that exhibited in the dia- 

 gram No. 77. 



Dr. Bucldand on Valleys of Elevation. We are indebted 

 to Dr. Buckland for an able memoir in illustration of several 

 districts of similar form and structure to the Weald, which 

 occur at no great distance in the south of England. His paper 

 is intitled, ' On the formation of the Valley of Kingsclere and 

 other valleys by the elevation of the strata which enclose 

 them *.' 



The valley of Kingsclere, situate a few miles south of New- 



Valley of Kingsclere. 

 a, b, Anticlinal line marking the opposite dip of the strata on each side of it. 



No. 79. 



Section across the Valley of Kingsclere from north to south. 



1, Chalk with flints. 2, Lower chalk without flints. 



3, Upper green-sand, or firestone, containing beds of chert. 



* Geol. Trans., 2nd Series, vol. ii. p. 119. 



VOL. III. 



