102 



EXPLANATION OF THE FIGURES. 



The figures are confined to West Kent. The scale (natural) is appended 

 ■ to each, every division being equal to one foot. 

 Abbreviations. 

 V.S. Vegetable soil or humus. 

 R.W. Old rain-warp or rain-wash. 

 T. Trail. 

 U.P. Underplight. 



Figure I. — At Milton Street, Swanscombe. 



„ II. — South of Dartford. The lower bands of fiint are distortions 



of the chalk itself, the upper those of the Bull-head. 

 „ III. — Festoons. At Slade's Green, Erith. 

 „ IV. — A section at right angles to the last — united at the line in 



the middle forming one section. 

 „ v.— South of Dartford. 

 „ VI. — At the junction of the loop and main lines of railway at 



Dartford. In the chalk. 

 „ VII. — The gravel at Dartford Heath, with brickearth lying in a 

 gully or channel, shewing the pressure exercised from the 

 higher ground on the left. The brickearth is that 

 belonging to the uppermost layers at Crayford. 

 „ VIII. and IX. — At Dartford Brent, sections at right angles at the 

 same spot, below is the gravel of the general spread of that 

 place, above disturbed layers of brickearth, then warp or 

 old rain wash which has been re-disturbed by trail, 

 undisturbed rain warp overlies it. 

 „ X. — Gravel of the South side of Dartford Brent, shewing a gall or 



pipe with disturbed seams and a cavity, taken in 1867. 

 „ XL and XII. — Two sections, one at Darenth and the other at 

 Gravesend. They are excavations in the chalk originally 

 shallow — perhaps made by small streams, over which fine 

 sand and pebbles lay, but the passage over them of ice and 

 trail has contracted and distorted them. The necklace-hke 

 spots are pebbles, the other parts sand, in chalk. In the 

 upper figure a band of chalk several inches thick is hardened 

 by pressure and infiltration, {x.) 



