498 MR. P. F, KENDALL ON A SYSTEM OF — [ Aug. 1902, 
The last of the great ice-flows to be considered is the Seandinavian 
ice-sheet. ‘The evidences of the approach of this great ice-sheet to 
the coast of Yorkshire are both direct and indirect. Scandinavian 
rocks of unmistakable character are found in Glacial deposits both 
on the coast-line and far inland. Mr. J. W. Stather found in my 
presence a beautiful specimen of rhomb-porphyry, in a deposit of 
Boulder-Clay at an altitude of 810 feet above sea-level, on the hills 
above Lockwood: this is both the greatest altitude and the most 
westerly situation in which these rocks have been found in the 
district. The augite-syenite of Laurvig I have found on the shore 
between Saltburn and Redcar: this is the northernmost known 
occurrence of a Scandinavian rock in Britain. 
Evidence is furnished by the consistent direction of the Glacial 
strize along the Yorkshire coast of the operation of an ice-sheet 
invading the country from the north-east, and the distribution of 
the Drift strongly reinforces this evidence. 
I must reserve for later discussion the question of the order in 
which these three ice-movements took place, but it will render my 
description of the special phenomena of the ice-margin more intel- 
ligible if I say at once that the general order appears to have been :— 
(1) the Teesdale Glacier’s unobstructed access to the coast; (2) the » 
arrival of the Scandinavian ice-sheet and diversion of the Teesdale 
Glacier into the Vale of York; and (8) the invasion of the 
Scottish ice. 
VII. Tae exrra-Morarnic Lakes, 
I have found it convenient to deal with the mass of complicated and 
mutually related detail by the adoption of an arrangement of the 
facts partly geographical and partly chronological. I shall describe 
first Lake Pickering—the lowest lake of the sequence, and the 
one which for a long period received practically the whole drainage 
of the northern, central, southern, and eastern parts of the area 
under consideration, leaving, perhaps, the western margin to drain 
independently. I shall then deal with its great affluent Newton 
Dale, and so pass up into the Eskdale drainage. Here it will be 
necessary to recognize and describe two distinct periods or phases. 
These two phases will be dealt with separately, and between them 
it will be convenient to treat of the lakes of the outer face of the 
Northern Cleveland Hills. The next area to be considered will be 
Iburndale and the Sneaton-Stainsacre recess, two indentations of 
the southern side of Eskdale, east of Goathland; then the coastal 
strip from Whitby to Filey, in order from north to south in four 
sections—Robin Hood’s Bay, Peak to Cloughton, Burniston to 
Scalby, Scalby to Filey. This arrangement will follow closely the 
actual course of the investigation, and, while the first portion, from 
the Vale of Pickering to the outer face of the Cleveland Hills, 
will ascend from lake to lake through a continuous system of 
drainage, the second portion, from Iburndale to Filey, will descend 
