no 
HOWAHTII : NOTICS OX HOl'LDKK MAKKIXUS. 
There are also records of certain Highland schists from as 
far north as the Ochill Hills in Pertlishire, identified by Messrs. 
Peach and Cunningham-Craig of the Geological Survey of 
Scotland. These are marked " H."" 
These rocks seem to have heeii first carried out to sea in 
south-east Scotland, eastern Xuitliiiinl)erland, and Durham, 
and to have been deflected southwards by the Scandinavian 
ice-sheet, as the Tees glacier and its contents were. 
Porphyrites of tlie Cheviot type are the most abundant, 
and are everywhere along the Yorkshire coast, and further south 
into Cambridgeshire. They are found also at many inland localities, 
including Barton-on-Humber. about Beverley, at Seamer. at 
Wykeham. in the Vale of Pickering, in Yedmandale, at Goath- 
land, at Carlton Bank. Bold Venture, and Scarth Nick. They 
range from sea-level up to 950 feet O.D. 
The fact tliat tliey are also found among the highest drift 
deposits along tlie northern face of tlie Cleveland Hills and on 
the eastern side of the Vale of York about Thirsk, seems to indi- 
cate that the Northumberland and Durham local glaciers were, 
like the Tees glacier, prevented from discharging seawards. 
They were thus compelled to turn southwards across the Tees, 
and were forced uji the northern slope of the Cleveland Hills 
by the Scandinavian ice on the one hand, and the Tees glacier 
(which similarly had to turn southwards down the Vale of York) 
on the other. 
The Eastern Grouf. 
Boulders of Scandinavian origin and marked " N " on the 
map are found in great numbers on the shore on the coast of 
Y'orkshire. in the clays and gravels forming the coast-hne, on 
the top of the coast cliffs at the Peak and Speeton, and at many 
places inland, both in drift material and on the surface. They 
range from Saltburn all along the coast to Redcliff and Ferriby 
on the Humber, and in vertical distribution from tlie sea -shore 
to 810 feet above sea-level. In a gravel pit at Burstwick in 
Holdei 'ness they were found 16 feet below the surface. 
