504 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 8, 
portion of its surface which was afterwards occupied by the Fluvio- 
marine and the Marine crags ; and the beds are placed in such close 
proximity that, notwithstanding the long period of time that may 
have intervened, it is difficult to separate them, especially as the 
crag-shells are laid upon and mingled with the stony bed. 
Ooast Section. Inland Section. 
Mumdesley, 20 miles to..-.........-« Norwich. 
Bacton, Hee CLORY cence ters tots ean ete do. 
_, Bramerton, 
Thorpe. 
_,. Wroxham, 
Horstead 
Lower Boulder-clay. : 
Fault at Brundall on the Yare, and Wroxham 
on the Bure 
Lower Boulder-clay. . Pebbly Beds. 
_ Pebbly Beds. Tellina balthica Crag. : 
nm 
a : 
 Tellina balthien Crag. Chillesford Clay. 
2) e 
& Chillesford Clay. Marine Crag. 
a 
= 
& Marine Crag. Fluvio-Marine. 
a 
4 
Fluvio-Marine. 
Fresh Water. 
A 6 i 
Forest-bed, without Mastodon arvernensis. Water Lines. 
Antwerp Beds, with Mastodon 
arvernensis. 
London Clay. Chalic 
The highly mineralized and decayed condition of the bones and 
teeth indicates long exposure to the atmosphere ; and, together with 
the disintegration and wearing down of the chalk by pluvial and 
atmospheric action, may account for their not being found in the 
upper part of the chalk hills. An act of justice may still be done to 
the memory of the illustrious Cuvier, who expressed his utter incre- 
dulity when the Mastodon’s tooth found at Whittingham, near 
Norwich, by the father of English geology, was shown to him, and 
he was assured that it came from the Norwich crag. He affirmed 
that it was next to impossible; and the result of the above observa- 
tions tends to prove that Cuvier was correct in his opinion that the 
Mastodon belonged to an older deposit. | 
A break is here established between the stony bed which con- 
tains the Mastodon and the Fluyio-marine which contains no 
