THE KERGUELEN ISLES 
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■difficult of access, and afford breeding-places to the 
birds of the Antarctic regions. In the interior we find 
the valleys bounded by steep walls of basalt and dome¬ 
like summits, exhibiting in their bareness the appearance 
of a piece of geologic sculpture. Studer observed ex- 
Kerguelen Island: View from Royal Sound. 
tensive beds of trachyte which had been pierced by 
streams of basalt and overlaid by basaltic masses. The 
place of contact was marked by the occurrence of beauti¬ 
ful crystals of amethyst, white chabasite and zeolite. 
The beds of basalt, split into columns and disintegrated 
by the weather, form regular fields of ruins. The 
