100 
characteristic Kakarsuak porphyrite to be described below. The 
nordmarkite exhibits here a well developed contact-facies with 
a fine-grained ground-mass and large felspar phenocrysts, which 
in places show rectangular, but more usually rhomboidai outline. 
This contact-modification has a breadth of some few meters. 
The same structure, though usually an even more fine-grained 
ground-mass, is shown in the numerous apophyses which enter 
the overlying rock. 
At the southern foot of Kakarsuak, the map would indicate 
that the nordmarkite borders upon sandstone, but the contact 
has not been observed here. 
Occurrence of fluorite at Panernak. — In the immediate 
vicinity of Narsak the land is very low and swampy, but about 
two kilometers N. N. W. of the town some low heights called 
Panernak (“the dry place”) rise over the marshy plain. The 
rock is a red granite, or facies of nordmarkite rich in quartz, 
and contains here a system of quartz veins running side by 
side as a rule, though branching, the main direction being 
Е. 10° N.—W. 10° S. There is a large number of veins, 10—20 
may be counted within a distance of ten meters; the veins vary 
in width from one to 30 centimeters. Besides quartz the veins 
contain fluorite in cubes and coarsely crystalline aggregates of a 
white or light greenish colour. The largest fluorite masses 
seen in 1908 had a length of 0'3 meters, but these are only 
the remains of originally much larger masses. The Greenlanders 
are very fond of the fluorite, which they use as snuff, and they 
have removed most of what could be got at easily; in conse- 
quence a hole has been made here about half a meter deep 
and three meters long. This is the most extensive occurrence 
of fluorite which has hitherto been found in Greenland; but it 
is not sufficiently large to be of economical importance; a brief 
account of it has first been given by Dr. Sreensrrur !. 
1 Meddelelser om Grenland II, p. 35 (1881). 
