PRESTWICH — WOOLWICH AND READING SERIES. 



149 



Feet. 



Brought forward 126 



II. Woolwich and r c. Dark sand 13 



Reading Series, I b. Mottled clay 30 



4S feet. [a. Clay, sand, and pebbles 5 



lu. Thanet Sands, \ b. Green sand 20 



44 /ee^. \a. Light black sand 24 



218 

 Chalk 76 



Well-section, Royal Mint, Tower Hill. (PI. I. Diag. A, 

 Loc. sect. 21, & C, Loc. sect. 7.) 



(Sect. Bor. by Metrop. Comm. of Sewers, 1849, Sheet 4, and from 

 examination of specimens.) 



Feet. 



Made gromid 11 



Gravel and sand 13 



London Clay. Blue clay 94 



f/.". Light sand i\ 



\ j. Light-coloured sand 14 



I i. Dark-coloured sand 4 



A. Mottled clay 5| 



II. Woolwich and \ g. Loamy dark sand and clay 5 



Reading Series, J^ f. Shelly blue clay (Cyreraa, Melania, Ostrea) 3 



hbfeet. e. White rocky soil, very hard 2^ 



I d. Green sand and pebbles, hard and dry 3^ 



I c. Loamy green sand and black pebbles 5 



I b. Green sand and pebbles 6 



[a. Green sand and shells {Ostrea) 4 



III. 7%aw«< &«&,? Dark sand 15 



20-i/ee^. LFlints .,. 5^ 



To the Chalk 195| 



Well-section, Truman, Hanbury and Co.'s, Shoreditch. 



(Mr. R. W. Mylne.) 



Feet. 



23-' 



IT. Woolwich and 

 Reading Series, - 

 53 Jeet. 



III. Thanet Sands. 



Made ground "1 



Clay I 



Gravel and sand [ 



Clay J 



London clay 79^ 



f »w. Light blue mottled 11 



I. Blue mottled 2 



k. Dark mottled 6 



j. Rock 1^ 



i. Bluish green 4 



h. Hard blue loam and sAe/& 6 



g. Hard yellow clay and pebbles 5 



/. Pebbles 4 



e. Green sand and black pebbles 2 



d. Shell rock \\ 



c. Green sand and pebbles 5 



b. Dark sand and pebbles 4 



a. Oyster-bed 1 



Dark grey sand and pebbles 43 



199 

 Chalk 201 



