26 



ME. G. W. LAMPLrGII ON THE JUJSX'TIOX OF [vol. Ixxviii, 



and more or less influenced by ' creep ' and ' trail ' movements. 

 The Glacial deposits present many featm-es of interest, Avliich, 

 however, will be mentioned without discussion, as being beside our 

 present purpose. 



N, 



Fig. 15. — (Section at tlie southern end of tlie excavated ])l.atform 

 alove Claridge's 2^it ; SejJtemher 27tJi, 1920. Snrface, at 

 tlie northern end, ahout JflO feet O.D., rising a few feet 

 higher northwards and falling sharply soiithivards. 



S. 



z. 



Yc. 

 Yb.. 





^1 ,• 



'- V.A 







/? ^ '1 



-±^ -\r^y\X^^^^^J\J^^~^^^^'-^^^.J2 



Vertical Scale. Horizontal slight!) reduced 



Z. Claj'ej' soil and subsoil, witli flints, etc. : 

 f c. Pale gvej'ish Chalky Bouldev Cla.\ 



Y^ 



hill-wash 



; massive and blue-"^ 

 jointed : boulders, mainly clialk and large flints, with many ( 

 Jurassic rocks, including fossiliferous limestones, sandy C 

 limestones, claystones, etc., often well-glaciated. J 



b. Chalky gravel and sand streaked with loam : fairl^^ wellO 

 bedded, with some cross-bedding : pebbles, mainly chalk > 

 and mostly small, avd'aging about 1 inch in diameter. j 

 j a. Dark sandy greenish Boulder Clay, massive and jointed :"^ 

 I with fewer and smaller stones than in Yc , mostly flint | 



I chips and glaciated bits of chalk ; occasionallj^ a boulder; }■ 



I the matrix appears to include much loamj' Lower Green 



1^ sand material : rests with a sharp junction on Gault clay 



ThicJiness in feet. 

 4 to 2 



^.< 



to 10 



0to4 



to4 



1 



''Palish grey-blue Gault claj', showing a crumbly crushed^ 

 structure, but some traces of bedding : some smooth brown- | 

 coated phosphatic nodules, black internally (up to 3 inches ^2 

 in diameter): much 'race' in the iipper part, and some | 

 throughout : J 



passing down into — 

 Darker Gault clay; brovi'nish ferruginous weathering in Ihe"^ 

 upper part ; and Avith a gritty admixture in the lowest 2 or | I 



3 inches (4a) : structure more or less disintegrated, with a )>3 to 4 i 

 little 'race' to the bottom in places; but fairly definite | | 



bedding. J J 



l^ iSTo fosiils seen in the Gault. 



to 6 



