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Correspondence. 



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as Hatfield station ; some way north of whicli, and close by the 

 Lijton-line junction, there was some time ago well shewn, by the 

 removal of some of the material for ballast, the upper Drift for a 

 space of several yards faulted perpendicularly into the middle. The 

 ^ section, however, between Hitchin and Wymondley 



shews, not only that the Drift has been faulted 

 in the way seen at Hitchin station, but that the 

 whole mass of Chalk, through which Hitchin cut- 

 ting passes, has been forced up since the Drift 

 was deposited. The following is the section : — 

 (See Woodcut, Fig. 1.) 

 The faulting of the Drift is a common thing in 

 ^ the East of England, and one or other of the fol- 

 3 lowing instances may, perhaps, fall within the con- 

 \ venience of some of your readers to observe for 

 3 themselves. 



s In a pit in the N.E. portion of Ordnance Sheet 50, 

 : and adjoining the farmhouse, three furlongs S. E. 

 ' by E. of Bulchamp workhouse, and eleven furlongs 

 from Blythford church, the upper Drift occurs side 

 by side with sand ; the two standing against each 

 i other like a wall. This sand I believe to be that 

 5 which intervenes between the Crag and Chillesford 

 % beds, in which case the vertical drop of the upper 

 3 Drift cannot be less than forty to fifty feet. If, 

 "" however, it be the sand of the middle Drift, then 

 the drop is proportionately less. A pit marked 

 " Sandpit " in the S.E. corner of the same sheet, 

 \ nine furlongs S.S.E. of Chillesford church, and ad- 

 l joining the Butley Eiver, shews exactly the same 

 I thing in all respects. A pit in Sheet 49, marked 

 5 " clay and sandpit," four furlongs from the shore at 

 ° Sizewell Cap, shews the junction beds of the upper 

 and middle Drift, conformably to each other, but 

 tilted at an angle of about twenty degrees with 

 3 the horizon.^ A pit two miles S.W. by S. of the 

 i last pit, and one furlong South of Aldringham 

 * church, shews the same jimction beds arching (by 

 lateral pressure as I regard it) in a double curve, 

 like the letter w. laid horizontal, but less sharply 

 bent than the curves of that letter. The coast sec- 

 tion between Pakefield and Kessingland, and a little 

 north of the lighthouse, shews a small fault of 

 "S some six or eight feet ; and another between Corton 



J and Hopton of about equal extent that has 



^ caused a depression which has been filled with 



post glacial gravel ; both of these extend through the upper and 

 middle Drift. A third, between Hopton and Great Yarmouth, shews 



^ This -was shewn in the sections accompanying a paper on the crag and drift in 

 Ann. and Mag. of Nat. Hist, for March, 1864. 



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