184 PROCEEDINGS OE THE GEOLOGICAX SOCIETY. 



At Burgh, near the southern extremity of the "Wold, we are in- 

 formed by Mr. J. W. Judd, F.G.S., that several borings in the marsh 

 showed Boulder-clay to be present, but extending to very unequal 

 depths ; all of it appears to be the lead-coloured clay with a pro- 

 fusion of chalk, and to answer to the basement clay of Holdemess 

 and the ordinary Upper Glacial clay, which begins a few miles west 

 of this place and has a considerable extension over Central and South 

 Lincolnshire. 



It may be useful to those studying the Cretaceous formations to 

 add that a boring carried through the chalk at Hull into the blue 

 OoHtic clay gave 536 feet for the thickness of this formation there ; 

 while at Hornsea, a boring, after passing through 797 feet of it, 

 failed to pierce the chalk, some bands, described in the boring as 

 " fuller's earth," alternating with chalk in the lower part of the 

 boring. A band of red chalk occurred iu the white chalk a few feet 

 from the surface of that formation in one of the Grimsby-Dock 

 borings. 



