14 KENDALL : THE GLACIER LAKES OF CLEVELAND. 
part, and boulder clay along the mai'gins. The head of Kildale 
contracts in a marked fashion before the point of entry of the 
Leven is reached, and then expands to the watershed at West 
Bank. The watershed is broad and fiat, and is occupied by an 
extensive bed of peat. A great overflow into Eskdale must 
have taken place here in glacial times. At the higher levels, 
of Lake Eskdale (725 to 715 feet) there would be a depth of 150 
feet of Mater over the pass, and Kildale and Eskdale would form 
one long lake (Plate XIV.). As the eastern outlets of Lake 
Eskdale were opened one by one the level of the lake fell until 
a strong stream flowed through the channel at West Bank. 
The course of this overflow Mas at once checked by the tranquil 
M aters of Lake Eskdale and the coarse detritus was throMii doM n 
as a delta. This produced the mass of gravel stretching doMn 
into Commondale. and forming a M'ell-defined plateau at 550 
to 575 feet O.D.. corresponding Mith the Moss Swang outlet 
of Lake Eskdale. The gravel extends for tM'o miles doM^n Esk- 
dale to Hell Hole, where it forms a flattened mass at an altitude 
of betMcen 525 and 550 feet. This Mould indicate a further 
stage in the low^ering of Lake Eskdale, but this second delta 
is probably due to a redistribution of part of the Commondale 
delta, M'hen the loMcring of the lake alloM'ed a free stream to 
denude it. A third stage is, perhaps, represented by a gravel 
flat extending to the east of the Howe at Danby, at an altitude 
just above 500 feet. 
Bold Venture Lake. — East of Hutton, one of the heads of 
Sleddale, Bold Venture, has a flat gap, about a quarter of a 
mile M'ide, just beloM- the 800-foot contour (Plate XIV.). On 
the eastern side of the gap are abundant erratics, including 
Cheviot porplwrites, and the broad gap itself is encumbered 
with gravelly material cut into a close- set series of mounds. 
Mdth their long axes running doM^n the valley. To the south of 
this drift barrier there is a great tract of peat. Some overflow 
must have gone on here, both from the drainage of the ice and 
also from a temporary lake in its advance and retreat, but no 
definite channel can be traced. 
Moorsholm Lakes. — Above LockMOod and Moorsholm the 
ice-slieet impounded the drainage of a considerable area, and an 
