sk(1m:taky s hkpoht. 
The main object of the meeting, as explained by the leader, 
was to study in the field the evidence which sliows that an ice- 
sheet surrounded the Cleveland Hills in the Ice Age, on the 
north, east, and west, which impounded the natural drainage 
of the interior ice-free region, so as to form a series of lakes. 
At the period of maximum extension the great ice-sheet, 
advancing on the Cleveland area from the north and north-east, 
abutted against the outer margin of the hills at elevations from 
1,000 feet near Stokesley to 600 feet near Scarborough. The 
interior of the Cleveland area at this time did not support anv 
native glaciers. The Vale of Pickering became a lake at an 
early stage of the Glacial Period, the outlet to the sea at Filey 
being closed. Newton Dale was then the overflow trench of 
the northern impounded waters, and a great delta of large cobbles, 
including specimens of the Cleveland dyke and other North 
Yorkshire rocks, was thrown down at its southern end : but 
at a subsequent date, when a cliannel gave egress to the northern 
waters by way of Scarborougli. this fine gorge (Newton Dale) 
was left vacant. 
After a short halt at (ioathland Church, the party were 
reinforced by several members who had travelled from Whitby, 
and, 19 strong, started for Mallyan Spout, a pretty little fall 
into the gorge of Wheeldale Beck. Following this gorge, which 
has been cut since the close of the Glacial Period, as far as the 
moor top, a notch was discovered called Moss Slack, which is 
considered to mark the extreme limit of the encroachment of 
the Scandinavian ice in this part of Cleveland. Ascending the 
opposite slope to Hazel Head, the party reached a shallow channel 
which marks the edge of the ice-sheet, the outfall of which is 
just at the level of the intake of Moss Slack, on the opposite 
side of the valley. 
Passing, down the hillside from Park Rigg, Purse ^loor 
Slack was entered, the higher of the two channels from Eskdale 
Lake. Randay Mere is the lower channel, a fine valley now 
utiUsed for the reservoir of the Whitby waterworks. On the 
moor side above is another notch, which is the deserted oxbow 
