SEWELL : NOTES ON GLACIAL DEPOSITS. 445 
on the chart just outside the east edge of the " delta." It was 
only some eight feet deep, and intended to store the roof water 
of two cottages. 
The sand excavated was very earthy ; many fairly large 
water-worn boulders, but as far as could be seen all were local 
limestones. The surface of the well would probably be a few 
feet higlier than " Bever's," hence the digging would hardly 
reach the " delta," if the latter existed so far to the east. 
Midway between Bever's Mill and Pickering Station, a gang 
of men were laying a gas-main along a country lane leading 
towards the town. The excavation showed one continuous 
flooring of water- worn boulders, most of them being one to two 
feet in diameter ; the men used crowbars to lever them, and 
lifted them out of tlie trench by hand. The foreman stated 
that he had seen no granite, and only one black hard rock (whin- 
stone). I saw no rocks but of the Newton Dale formations ; 
they were very closely bedded and with little earth or sand 
covering. 
The " delta " must have been formed by a ver^^ different 
river from the stream now flowing through Newton Dale. 
We must also remember that there is no Lias or whinstone 
on the south, or Pickering, side of the present watershed. 
