80 TEOP. J. rEESTWICH ON THE RELATION OF THE 



Memoirs hj the officers of the Geological Survey, on different parts 

 of the Eastern Counties, have appeared, aud various opinions have 

 been expressed respecting the age, and the correlation, as well as the 

 classification of these beds. It may be desirable therefore, before pro- 

 ceeding to the second part of this ].»aper, to give my reasons for differ- 

 ing from some of these conclusions. The Memoirs of the [Survey, to 

 whicli I shall have frequent occasion to refer, now siipi)ly a mass of 

 valuable details, which greatly facilitate the task and do away with 

 the necessity of much local description. I shall confine myself 

 therefore to my own notes and a few typical sections, and to ques- 

 tions of synchronism and classification. 



§ 2. Historical Review. 



In my notice of the Westleton Eeds, I referred, but xavj briefly, 

 to the Eure-Valley Crag of Messrs. S. Y. Wood and Harmer, as I 

 touched only incidentally on the beds of north Norfolk *. At the 

 same time, I felt justified in expressing my own views with respect to 

 their general bearing, not only because they difi'ered in many material 

 points from those of Mr. Wood, but likewise on the ground that my 

 paper was the result of independent observations made during the 

 preceding quarter of a century, and our conckisions differed on 

 m.any material points. It would appear that we were both work- 

 ing independently at the same subject, and the diffeience of views 

 may have arisen in a great measure, as sugge^ted by Mr. 

 Whitaker, from the fact that whilst Mr. \Vood was workiiig 

 from north to south and chiefly inland, I had been working Irom 

 south to north and chiefly on the coast-line. 



That I was not singular in hesitating to accept Mr. Wood's views 

 will be evident from the remarks of Mr.H.B. Woodward, Mr. Clement 

 lleid, and others, who have since surveyed the district. 



In 1866 Mr. Wood stated briefly, in the supplement to a paper 

 by his father on the Crag Mollusca t, that in the liure Yalley there 

 was a fossiliferous Crag consisting of sands and shingle with shells 

 {TdJina ohliqua, Cijprina zslandica, Cardium edide, &c.) in patches, 

 and that this Crag was newer than the Norwich Crag. As these 

 beds in the Euro Valley rest, however, directly on the Chalk, 

 and as the diagrams were only generalized ones, we were, in the 

 absence of detailed local sections, left without the necessary strati- 



* I regret that Messrs. Wood and Harmer should have thought that my state- 

 ment was amisrepreseniation of their views. I mentioned, J belie\e correctly, 

 that they had placed the Bure-Valley Beds ou a higlier level tliau the Noj-wich 

 Crag, thougli I may have misunderstood, with reference to the Wejbourn Crag, tlie 

 meaning they attached to the term " Lower Grlacial," with which they associated 

 these beds. In the absence of more detailed sections aud definitions, it was 

 difficult to follow the exact meaning of Mr. Wood's earlier jiapers. Wliether 

 there was anything new in my views, 1 must leave the reader to judge. There are 

 certainly material differences in our interpretation of tlie phenomena. 



t Quart. Journ. Geol. Soc vol. xxii. p. 547. 



