or 
and are alternately white and black (or green). The white bands 
consist of a saccharoidal aggregate of felspar, sometimes with 
dots of green ægirine 2—5 millimeters in diameter. The colour 
of the black and green bands is due to arfvedsonite and egirine. 
At several places near the contact the lujavrite is traversed 
by pegmatitic veins, which consist mainly of large arfvedsonite 
prisms and felspar. The border-modification of the lujavrite 
sends out numerous apophyses, sometimes over 20 meters long, 
into the adjacent stratified rocks. 
The sandstone bordering on the lujavrite is white with a 
somewhat quartzitic appearance. The igneous sheet which covers 
this sandstone consists of a porphyrite with numerous pheno- 
crysts of felspar; the latter show distinct twin lamellation and 
appear in the form of plates about 1 millimeter thick by 1 or 2 
centimeters long. At many places the phenocrysts have a 
fluxionai arrangement, and the direction of the flow-structure 
is almost at right angles to the contact-plane with the nepheline- 
syenite. As shown in Fig. 12, several detached fragments of 
porphyrite, some hundreds of meters in length, are found in 
the nepheline-syenite; around these fragments the lujavrite 
shows the same contact-facies as described above. With regard 
to the exomorphic contact- effects in the porphyrite, these can 
hardly be seen with the naked eye where the adjacent lujavrite 
has a dense structure; only at a few places, where the lujavrite 
is fine-grained at the contact, the porphyrite is distinctly con- 
tact-metamorphosed and contains innumerable, small flakes of 
brown mica. 
NUNARSUATSIAK. 
The south-west point of Nunasarnak is separated from the 
llimausak Mountains by the Tunuarmiut Inlet. At the foot of 
Ilimausak, on the north shore of the inlet, lies the small iso- 
lated hill Nunarsuatsiak which reaches a height of about 160 
meters. This hill is seen in the photograph PI. ХУ. It consists 
