SEWELL : OVERFLOW CHANNEL IN NEWTON DALE. 449 
I think we are safe in believing that the three more northerly 
miles of the five miles of Xewton Dale, between Fen Bogs and 
Raindale, did not exist as a continued depression, unless that 
into each dale — Eskdale to the north, and Xewton Dale to the 
south — flowed the drainage stream from Lilla Cross and Salters- 
gate respectively. 
If this is so, the 800, or at that time possibly 900-foot contour 
line would be unbroken eastward from Wardell Rigg to the 
neighbourhood of Saltersgate. 
Mr. Kendall shows how at one period during the Ice Age 
the ice pressing upon the land caused the drainage to flow due 
south, as alread}^ stated, he using Xewton Dale as an example 
of one of these early overflow channels. My contention is that 
before the 800 feet contour line of Xewton Dale was pierced, the 
" Lake Eskdale," flowing into the " Lake Wheeldale," had its 
waters held up to such an extent by the ice-sheet covering Esk- 
daleside and Goathland, that its overflow would be through the 
old river vallej^ already described, and now known as Slavey 
Slack (820 feet O.D.), between Brown How and Wardell Rigg. 
This discharged into a lake covering the district around Raindale, 
the surface of which must have been above the 700-foot contour. 
The floor of this lake would correspond with the present Stony 
Moor (585-600 feet), which in all probability is now covered with 
the debris that has been carried by this early Glacial river. 1 have 
found a large boulder of whinstone, and ice-worn KeUaways 
rock similar to those that strew the old Hunt House and Goath- 
land valley, above the 700-foot contour line to the south of 
Wardell Rigg. The peat-fiUed channel in Slavey Slack dies out 
after a drop of about 100 feet from the intake, which may possibly 
be choked with 20 feet of peat and sand.* If Slavey Slack is the 
highest overflow channel, then the ice in Eskdalet must have 
stood above the 800 feet limit, or at the same height as Professor 
Kendall finds it attained in the Scugdale area to the north, and 
* Xo water now flowing through Slavey Slack. 
t Eskdale comprises the valley connecting Whitby and Goathland, 
and must not be confounded with the 'Lake Eskdale" of Kendall ! The 
latter is located as lying above the higher reaches of the River Esk to the 
Xorth. 
