MICACEOUS SCHISTS. 
135 
the foliation. Pebbles of fine-grained quartz-grits, obviously derived from granitic 
material, were obtained in the dredge off King Edward VII Land. 
From various localities come specimens of dark micaceous schists, which under the 
microscope have much the appearance of contact-metamorphosed sediments. 
One of these specimens (96) comes from Granite Harbour. It consists of sub- 
angular grains of quartz and some plagioclastic felspar, with strings of strongly 
pleochroic (from nearly colourless to deep reddish-brown) mica ; grains of sphene are 
also plentiful. A very similar rock (578), but of finer grain, was found near the 
contact of the kersantite (579) with the crystalline limestone (576) at the north-east 
end of the Blue Glacier. Somewhat similar rocks, but of still finer grain and more 
slaty in appearance, were found amongst the rock-fragments from the dredge, both oft' 
Balleny Islands (866) and off King Edward VII Land. 
Black shaly to slaty rocks (836, 496) were obtained from moraines on the Blue 
Glacier and at the south-east end of Black Island (525), and also from the dredge off 
Balleny Islands (866). 
