COLE : DISTRIBUTION OF MOORLANDS IN EAST YORKSHIRE. 401 
north there is a dead level, to the south one somewhat similar. 
Really, he is on the terminal moraine of the Stainmoor glacier. 
AVhat has planed down the whole country northwards, and 
left so many places designated as moors ? This is the question ? 
I have little hesitation in answering, the glacier did it. It 
easily removed the surface soil ; and the subsoil, consisting of 
New Red Sandstone, offered no resistance. In the process little 
Boulder Clay was deposited, because the mud was constantly" 
carried away by the streams which flow under all glaciers, and 
there was nothing to check the escape of the muddy water. It 
seems to me that Boulder Clay can only, as a rule, accumulate 
in hollows, or where for some reason the mud cannot escape 
and has time to settle, as, for instance, in Eskdale and in all 
the pre-glacial valleys, in fact, on the coast facing the icewall 
which then existed, or between a moraine and a line of hills, 
as in the rear of Sheriff Hutton. The centre of the Vale of 
York to the north was washed clean, and nothing but sand left 
behind, which constituted a most unprofitable soil, whereas to 
the south, in front of the moraine, a good deal of mud was 
dropped and mixed with the soil, creating a sort of loam which 
was more productive. 
It is in this way that I venture to explain the presence 
of moors in the north, and their absence in the south, of the 
York moraine. 
List of Moors. 
1. North. — Heworth, Murton, Holtby, Huntingdon, Stockton,. 
Earswick, Common Moor, Haxby, Strensall, AVigginton, Thol- 
thorpe, Rawcliffe, Clifton, Skelton, Hall Moor, Sutton, Moxby, 
Brown Moor, Ox Moor, Helperby, Hag Moor, Myton, Aldwarke, 
Youlton, Newton, Marston, Poppleton, Acomb, Moor Monkton> 
and Scagglethorpe. 
2. South. — Barmby-on-the-Moor, Holme-on-Spalding Moor, 
Ross Moor, and Ox Moor. 
