406 
THE LAST DECADE. 
winter, and in summer streaked and drenched with melting snow 
and muddy chalk detritus ; and of dales, sometimes ice-bound, 
sometimes held by rills and streams and floods of icy water, sweep- 
ing out into the low gi'ound with swift floe-laden currents. It is also 
stated in this paper that there is reason to believe the ice-flow during 
the glacial period did not wholly cover the Wolds. 
For the tine chalky low level gravels found on either side of the 
stream known as the G}q)sey Race, the term ' Gypsey Gravel' is pro- 
posed. These are supposed to have been formed as valley gravels of 
the Gypsey, at a period later than the deposition of the Bridlington 
Series. 
In the Proceedings issued in 1882, will be found a description 
of Thornwick Bay, Flambro', in explanation of the photograph issued 
by the Society. It includes some account of the drift deposits of 
that part of the coast, and also shows how much the shape of the 
coast is affected by the presence of a pre-glacial valley on the head- 
land running close to and nearly parallel with the coast line on the 
north side ; this valley by its influence on the erosive action of the 
sea, being the chief cause of the extremely jagged outline of the shore- 
line northwestward from the lighthouse. 
In 1885 Mr. Lamplugh contributed a paper ' On Icegroved 
Rock-surfaces near Victoria, Vancouver Island, with notes on the 
glacial phenomena of the neighbouring region, and on the Muir 
Glacier of Alaska,' in which he described observations made during 
a visit in 1884 to the Pacific Coast of North America. 
In the proceedings for 1887 are three papers by i\Ir. Lamplugli, 
one on the larger Boulders of Flambro' Head, is the first instalment 
of a study of the glacially-transported blocks to be found lying on 
the shore and elsewhere on the headland. This study, which was 
undertaken at the instigation of the Yorkshire Boulder Committee, 
aims, by cataloguing all the boulders within a given area that have 
any dimension exceeding twelve inches, to determine whether any of 
these may be localized, or whether the various rocks are evenly dif- 
fused over the whole area. One somewhat unexpected result has 
already been brought out, for it appears that, at any rate on the 
south side of the headland, somewhere between 60 and 80 per cent. 
