140 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



London Clay. < 



I. Basement-bed of 

 the London Clay} 

 <ofeet. 



Feet. 



Brought forward 16 



Blue clay 24 



Blue clay, mixed with dark sand 10 



Blue clay, lighter-coloured, and sand 

 Black pebl)les 



II. Woolwich and 



Reading Series, <{ 



h. 

 9- 

 f. 



blfeet. 



5 

 1 



Light green mottled sand 7 



White live sand 3 



Light green sand, slightly mottled 1 



Green sand, but darker 3 



Green sand, mixed with flint-pebbles ... 3 



Dark bay green sand 7 



Green sand and pebbles 1 



Green sand, getting darker 16 



Green sand, very little difference 10 



Chalk not reached. 



Well-section, Hoddesden Brewery. 

 (Mr, R. W. Mylne.) 



107 



Feet. 



Gravel > 20 



Lower part of the^X ^ j^oam and marly sands 45 



frrr",^^/''^U. White sand .. 24 



thenoohmchand ( ^^.^^^ j 



Reading i>eries. J 



Chalk 



90 

 4 



The sections in continuation northward of this Hne have been given 

 in a preceding part of this paper (p. 92). 



We will now take an East and West line, commencing near Esher 

 where the principal changes take place in the structure of the Lower 

 Tertiaries, and passing also through London to Chelmsford. 



Well-section, Claremont. 

 (J. Day.) 



Feet. 



Lower Bagshot Sands. Sand 50 



London Clay. Blue clay 450 



Woolwich and fc. Mottled clays 48 



Reading Series, < 5. Brown sand 10 



60feet. \_a. Green sand and flints 2 



To the Chalk 560 



Well-section, Isleuoorth. 



(Trans. Civ. Eng.) 



Feet. 



Gravel and sand 24 



London Clay. Blue clay 216 



Cf. Clay, mottled light red, becoming 



Woolwich and darker as it deepens 68 



Reading Series, < e. Blackish clay 3 



S7 feet. d. Yellow sand passing into light green 6 

 I.C. Dark green clay 10 



Chalk not reached. 327 



