l62 



PLEISTOCENE DEPOSITS AT 



(3) Sandy gravel, with shingle 



beds, shghtly stained with 

 manganese in places . . . 6ft. 



(4) Sand, the upper part of which 



was ' iron-pan ' and with a 

 continuous seam of M anganese 

 at X in the section (Fig. i) . . i-2ft. 



(5) Layers of sand and small 



pebbles filling hollow in next 5ft. 6in. 



(6) Gravel, with lenticular patch of 



sand, up to ... ... 5ft. 



London Clay v."ith water. 



.V 





3 



Sketch Section of exposure in Pit N.W. of Wanstead Park 

 For explanations sec text. 



As will be seen by reference to Fig. i, the beds numbered 5 

 occupy a channel which has been cut out of bed 6. The direc- 

 tion of the axis of this channel is from west to east, a direction 

 which is approximately coincident with tliat of the Thames. 

 There can be no doubt that this ancient channel was eroded by 

 an under-current of the Pleistocene river. 



In the paper before referred to' an account of the High 

 Terrace Drift of Barkingside was given in which I recorded the 

 occurrence oi Bos 2^i'i>'iig£'i ins ? or Bison priscnsl and Eq mis caballus. 



