56 RELATIONS TO OTHER BRITISH DEPOSITS. 



better be taken as the basement bed of the gault; — important 

 physical events having, as a rule, separated the two groups. 



The Downham coprolite bed being thus excluded we are met 

 with the demand — what then is the representative of the Upware 

 Nodule bed in the Downham Market section ? I should consider 

 that it very probably exists somewhere amongst the 20 feet of 

 sand beneath the rock bed or Carstone, or, may be, a little deeper. 

 These sands have not yielded any fossils, nor have I seen here any 

 evidence of a physical break between them and the gault, other 

 than that which is probably indicated by the Phosphatic nodule 

 bed itself. 



Passing northwards from Downham Market the Neocomian 

 sands swell out considerably in thickness and form the sandy 

 country about Sandringham warren. They vary somewhat in 

 character, being sometimes a pure white sand, more often yellowish 

 or fox coloured and frequently false bedded and obliquely lami- 

 nated ; while at Wolverton these sands "closely resemble those of 

 Woburn, Potton and Sandy" (Teall, Sedgwick Prize Essay, p. 19). 



In this country too the Carstone, " an indurated ferruginous 

 sandstone," notifies its better development in well-defined crests 

 and escarpments ; and beneath it a bed of clay comes in which is 

 worked for bricks and tiles at Heacham and Sandringham. 



The fossil remains in all these places are most scanty and 

 meagre, and I can only reproduce the records already published by 

 Mr Teall, who found at Lodge Hill, Snettisham, specimens of 

 Lacina and Pecten orbicularis, and at Heacham, in the stiff dark 

 blue clay, A mmonites Deshayesii, Pecten orbicularis and a Trigonia. 



Dr Fitton found the following fossils in some 'ferruginous 

 masses' in a brickfield near Ingoldsthorp, Norfolk, which he 

 records as follows 1 : 



Cinulia incrassata, Sby. ; Avicula ; Panojxea plicata, Sby. ; 

 Rostellaria calcarata, Sby. ; Turritella granulata, Sby. ; Venus 

 faba, Sby. 



We have now arrived at the well-known Ironsands and Car- 

 stone of Hunstanton, a set of ironsands and pebble beds with a 

 zone of nodules near the base of the series. Fossils occur rather 

 rarely in this bed, in the lines of nodules just referred to, and we 



1 Fitton, Strata below the Chalk, page 317. 



