146 



PEOF. TEESTWICII ON THE AGE, FORMATION, AND 



bed, but the two beds are nowhere seen in superposition. The 

 brick-earth attains its greatest height at Gibb's Farm and Trenchleys, 

 rising there above the 500-feet contour-liue, while it extends ^ mile 

 westward to Westheath at about the same level, but it is not worked 

 at these places. 



Fig. 7. — Section at the Briclc-earth pit, Limpsfield Common. 



c". Weathered surface, bleached 1 foot. 



c Disturbed brick-earth "[^ . 



c. Undisturbed brick-earth, mi stratified, ' 

 4. Lower Green sand — a soft loamy grit. 



ith angular debris... 8 to 10 feet. 



This brick-earth is very stony, and no fossils of any sort have 

 been found in it. Unlike the gravel, the rock-debris in it consists 

 in greater part of angular fragments of the Chert, Eagstone, and 

 Ironstone (with some of the latter subangular and of large size), 

 from the Lower Greensand to the south of the pit, mixed with 

 which are angular and subangular flints, and Tertiary flint-pebbles 

 derived from the gravel on the north. These are scattered irregu- 

 larly and at all angles through the brick-earth. The bed exhibits 

 possible glacial influences, not only in the irregular distribution of 

 the stony debris, but also in its indented surface, which shows dis- 

 turbance b}^ action from above (may be floating ice), causing 

 contortion of the bed, and which has tilted a number of the blocks 

 and pebbles upright on their longer axes. Occasionally a seam of 

 fine gravel has been caught up and dovetailed into the base of c', 

 so making the line of separation between c and c' more distinct. 



In this pit Mr. A. M. I5ell has discovered a few PaloDolithic flakes 

 and implements. He has also found a well-shaped flake at a 

 depth of 3 feet in undisturbed brick-earth on Gibb's Farm. The 

 brick-earth continues a short distance eastward, following the 

 course of the swale, which gradually eiilarges eastward towards the 

 Darent, and it is in a field on lledland's Farm, over which there are 

 traces of this brick-earth or of trail, that Mr. Bell has found the 

 greater number of the flint implements in his collection. These, in 

 his opinion, have been brought to the surface by the circumstance 

 of the ground having, a few years ago, been grubbed up and trenched 

 to the depth of 1 to 2 feet. 



Lower down the valley no brick-earth has lodged except in a few 

 sheltered places. There is a small bed worked at Covers, near 



