444 
SEWELL : NOTES ON GLACIAL DEPOSITS. 
AMiinstone. Two long rounded pieces noted, 8 or 10 inches 
by 4 inches. These were quite red, resembling tlie weatliered 
rock at the edge of the d^^ke ; the oxydised skin miglit be I of an. 
inch thick. They broke with a black heart. 
The most interesting find was, apparently, a rounded piece 
of dirty umber-coloured clay (18 inches by 10 inches). It liad 
probabty been lifted by hand out of the well, so may have been 
harder before being exposed to the air. Upon driving the hammer 
MAP OF THE IMCKEUINt; DJILTA. 
head into it I noticed tliat a piece came away wdth a clean break. 
a.nd on breaking it further found that the centre stiU showed tlie 
close black laminated lajws of either the Lias or Oolitic shale. 
Many other rocks not known to the writer, except as local 
types, were heaped together at the well mouth. 
Well No. 2 was situated about half a mile east of the one 
just mentioned and south-east from Pickering Station, sliowing 
