LAMPLUGH : SHELLY MORAINE OF THE SEFSTROM GLACIER. 239 
The general arrangement of the lateral moraines of the Von 
Post Glacier resembles in many respects that of the terminal 
moraine of the Sefstrom glacier ; they are heaped up in a 
similar though narrower plexus of ridges which on the north side 
of the bay (where I saw them best) rise sharply above lower 
ground that has lain be} ond reach of the glacier in its advance. 
The waters of the bay are deep, sinking so rapidly on the northern 
side that there are soundings of 200 feet within about 250 yards 
of the shore {fide Prof. De Geer's map), and it is surprising that so 
much of the bottom-moraine of the glacier should have been 
extruded above sea-level on its flanks. Apparently here, as on 
Cora Island, the ruling factor has been the rising slope upon which 
the ice impinged, in the one case laterally, in the other case 
frontally. In both cases the pressure of the glacier upon the 
slopes seems to have had the effect of squeezing upward and 
outward the moraine-laden layers from the lo\\'er part of the 
moving mass. 
The ridges of boulder-clay forming the northern moraine 
rise to 40 or 50 feet above the sea and run parallel to the shore, 
or, in other words, to the former flank of the glacier. This 
moraine varies in width ; I noted one spot where it was not more 
than 60 or 70 yards across. A longitudinal hollow occupied by 
a pond of water intervened between it and the steep mountain- 
side, but was being rapidly filled by detritus from the adjacent 
screes-slopes and by fluvio-glacial wash brought down from the 
ends of two smaU glaciers in tributary valleys. 
The corresponding moraine on the southern side of the bay 
is broader and higher, probably rismg to over 100 feet above 
sea, but I had not sufficient time to gauge its dimensions or to 
examine its landward edge. 
CONSIDERATIONS AFFECTING BRITISH DRIFTS 
Most of the facts that I have reviewed in the above pages 
were, as already acknowledged, previously known to glacialists, 
particularly to those of Scandinavia ; but they deserve to be 
restated for the purpose of emphasizing their application to some 
problems of our British drifts. It remains for me to summarise 
the points that, in my opinion, are most instructive in this con- 
nection. 
