104 



Figure "IX. — Two layers of Trail, Warp, &c., covering a very deep mass 

 of confusedly arranged pebbles (Tertiary) at x. These 

 latter are not disturbed so as to come under the classifica- 

 tion of T. or U.P., Kingsdovvn. 

 ,, X. — This section is taken from Longfield, Kent. The lowest 

 layer Ti. consists of almost clean flints,, slightly smeared 

 with clay, above is R.W., then T. of flint stones again with 

 R.W. again ; on the left is shewn a thick deposit of very 

 clean flints. The irregular lines shew the margins of 

 different colours caused by infiltration and peroxidation. 

 The two lowtst figures represent sections taken along the 

 crests of the North Downs, and the Lower Greensand 

 ridge. The Greensand ridge is somewhat misplaced, 

 having been shifted about one mile too much to the West. 

 But allowing for this, the figures shew the relative positions 

 of the river openings in the two ridges which are about 

 five miles apart, the one south of the other. 



