258 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 14, 



which came with the salt are of Miocene age. In other West- 

 India islands gypsum of Miocene age occurred, and pseudomorphs 

 of salt. He recommended Mr. Sawkins's work on the Geology of the 

 West Indies to the attention of geologists. 



4. A Description of the " Broads" o/East Norfolk, showing their 

 Origiist, Position, and Formation in the Yalleys of the Riyers 

 Bure, Tare, and Wayeney. By Eichard B. Grantham, Esq., 

 C.E., E.G.S. 



[Abridged.] 



The author described the " Broads " of East N'orfolk as large lakes 

 of fresh water situated in the valleys of certain rivers, such as the 

 Bure, Yare, and Waveney, although never directly in their course, 

 the distance of the Broads from the above-mentioned rivers being 

 from one quarter of a mile to three miles. They are, however, con- 

 nected with the rivers by watercourses. The Broads in the valleys 

 of the rivers Bure, Yare, and Waveney are thirty in number, twenty- 

 three of which are in the valley of the first-named river. The author 

 gives the following list of them with their areas in acres : — 



I. On the Hiver Bure and its Tributaries. 



Acres. 



Ormesby, Eollesby, & Filby 464-9 



Walsham 62-1 



Eanworth IITG 



Little 13-3 



Decoy 22 



Salhouse 22-8 



Burnt Fen 11-7 



Hoveton, Little 67'6 



Hoveton, Great 121 -5 



Wroxham 92-4 



Bridge 128 



Belaugh 120 



II. On the River Yare. 



Buckenham 201 



Strumpshaw 17*1 



Eockland 1170 



SurHngham 1040 



Catfield ... 

 Oliver . . . 

 Barton ... 

 Stalham... 

 Dilham . . . 

 Hickling& 

 Whitesley 

 Womack . 



on the 

 river 

 Ant. 



on the 



Acres. 



( 22-4 

 230 

 ^ 229-6 

 75-6 

 17-6 



578-0 



25-5 



Chapmans )■ Hundred ■{ 46-8 

 Martham Stream 115-5 

 Horsey... 130-6 



Calthorpe ; (^ 13-8 



III. On the River Waveney. 



Fritton 157*0 



Flixton 12-8 



Oulton 99-0 



The aggregate area amounts to 2816 acres. 



Many of the Broads are being reduced in size by the deposition of 

 decaying vegetable matter, and the accumulation of detritus brought 

 into them by the small streams which feed them. The bottoms 

 of Martham, Hickling, Whitesley, and Horsey Broads are about on 

 the level of low water at Yarmouth; the bottom of the united 

 Ormesby, Eollesby, and Filby Broads is from 12 to 14 feet below 

 that level. The surface of the water in the last-named Broad is 

 about 2 or 3 feet above that of high water. 



The author maintains that the " Broads," although freshwater 

 lakes, are relics of a time when the whole of these valleys were sub- 

 merged, and' in fact formed great estuaries. He instances the salt- 



