118 prof. j. pre8twich on the relation of the 



Discussion. 



The Chairman remarked on the importance of the problem of 

 the correlation of the East Anglian Drifts with those of the Thames 

 basin, and of the especial qualifications of the Author of the paper 

 for dealing with this great question. 



Mr. Clement Eeid noticed that the Author went further than he 

 had previously done in accepting recent results. With regard to 

 the correlation of the beds on the northern coast of Norfolk with 

 those of Westleton, he thought it most dangerous to take the unfos- 

 siliferous beds of the latter place as a type. On the Norfolk coast 

 the Weybourn Crag was classed by himself with the Forest Bed 

 as a matter of convenience. Its fauna was sufficiently marked 

 to show that it was slightly newer than the Norwich Crag. It 

 always contained Tellina haJthica, whilst that shell had never 

 been found in the Norwich Crag. The fauna was also slightly 

 more Arctic than that of the Norwich and Chillesford Crags. 

 The beds which the Author bracketed as the Forest Bed, did not 

 include the Upper freshwater bed. He gave reasons for his having 

 himself included it with the Forest-Bed series. As to classing 

 the Arctic freshwater bed with the Upper freshwater bed, he noted 

 that the floras showed a difference of climate of 20°, and he con- 

 sidered the grouping together of the two unadvisable. He thought 

 it unsafe to use the term Westleton Beds until some definite fauna 

 was found at "Westleton. If any definite name for the whole series 

 was used, Mr. S. Y. Wood's old term " Bure-Yalley Beds " should be 

 adopted. 



Mr. H. B. Woodward believed that, for purposes of correlation, the 

 terms Norwich-Crag Series, Forest-Bed, and Glacial Series should be 

 used, while minor subdivisions, such as Bure-Yalley Beds, Chillesford 

 Beds, and Westleton Beds, might, with advantage, be dropped. He 

 had himself come to the conclusion that the Westleton Beds were in 

 the Glacial series. He agreed with the Author that the Weybourn 

 Crag was Norwich Crag, for he placed it on the same horizon as 

 the Bure-YaUey Beds. Unfortunately beds which belong to a 

 horizon higher than the Forest Bed had also been included with the 

 Bure-Yalley Beds by Mr. S. Y. Wood. The name Mundesley Beds 

 was a useful local term for these higher beds ; but if the term 

 Westleton Beds was associated with them, it might turn out in the 

 end that there were no " Westleton Beds " at Westleton. 



Mr. J. A. Brown had obtained a stone apparently worked by 

 human agency from the Weybourn Crag of Eunton Gap. He had 

 also found a black flake at Westrand in peat. 



Mr. TopLEY remarked on the indebtedness of the Society to Prof. 

 Prestwich for his many years' labour on this ground. The Survey 

 had now agreed not to mark by any definite name these beds under 

 dispute. AVhatever classification might eventually be adopted, the 

 lines on the Geological Map marked actual lithological differences. 

 He would deprecate the re-introduction of the term Bure-Yalley 

 Beds. 



