234 On the Silica Strata of the Loicer Chalk. 



II. — Middle Section. 



From "Hook," in " DippenHall Farm," over a surface of about 200 yards, from 

 south-east to north-west. 



No. 







Silica. 



Carbonate 

 of Lime. 



Remarks. 



68 



13-41 





Very soft dirty-white " malm," near the gault. 



33 



18*07 







32 



15*98 





Ditto. 



53 



15-27 





Ditto, dug out 6 feet deeper than 32. 



31 



30-76 



28-09 



Hard rock, with blue marks, about 3 feet thick. The 

 only specimen in which a large quantity of carbonate 

 of lime is present in the middle part of the section. 



30 



38-31 





Soft rock. 



29 



40-16 





Harder rock. 



28 



49-81 





Still harder. 



28* 



29*67 





Soft marly stuff interspersed with the hard rock. 



27 



44-41 





Eather soft rock. 



62 



48-32 





Hard rock. 



11 



53*01 





Ditto. 



54 



43*83 





White building or " firestone."" 



These, like section I. to the grey marl. The vertical depth from Nos. 33 to 54 

 inclusive is about 70 feet. 



III. — North-East Section, in Crondall Lane. 



No. 



Silica. 



Carbonate 

 of Lime. 



Remarks. 



10 



6 



14 







Near the gault. 



59 



32 



20 







58 



35 



30 







Soft rocky texture. These are all similar in appearance 



50 



29 



24 







as well as in the analytical results. They constitute 



9 



27 



86 





^ a layer of about 40 feet in thickness. This also is 



9* 



30 



00 







the part that has been so extensively quarried for 



: 9** 



33 



88 







manure. 



51 



31 



04 









23 



23 



36 





Very soft stratum 3 feet thick. 



25 



59 



79 





This rock occupies a relative position to No. 39 and 

 No. 11 in the preceding sections; Nos. 39, 11, and 













25, being the respective culminating points. 

 The white building or " firestone." The blue limestone 

 is here absent. 



60 



54 



54 







Vertical depth of this whole Section about 60 feet. 



We believe tliat the above description will generally apply 

 to the district between Farnham and Petersfield, though the 

 whole strata and their subdivisions will vary considerably in 

 thickness. In many parts, too, of this district, the strata are 

 nearly horizontal, and in these cases when the rock is near the 

 surface the land requires drainage, as the rock acts like a pave- 

 ment to obstruct the water in its downward passage. This, 

 combined with many instances of careless farming, precludes 

 the development of the intrinsic fertility of this soil. 



