ON WSIS TAROWABIEIS, QCOQUIRINIZING’ Ole 2 LARGE 
AREA OF NEPHELINE-BEARING ROCKS ON WEEE 
INQURIN SSNS IE (COVMS I (OG ILS, SUIS IMO 
In a recent paper in this JouRNAL,’ Dr. Coleman has described, 
under the name of Hevonite, an interesting analcite-bearing rock 
from near Heron Bay, on the northeast shore of Lake Superior, 
and states that although the occurrence of a dike rock of this 
composition would indicate the presence of nepheline syenite in 
the vicinity, no area of this rock had as yet been discovered 
in that district. Many years ago, while looking over some of 
- the rock collections in the museum of the Canadian Geological 
Survey, at Ottawa, my attention was attracted by two specimens 
of a rather coarse-grained, red rock from Peninsula Harbor, 
Lake Superior, on account of the fact that their appearance sug- 
gested that they might belong to the class of nepheline syenites. 
Sections were made and examined at the time, but no nepheline 
was found, and the investigation was not carried further owing 
to lack of material and absence of information as to the exact 
mode of occurrence of the rock in question. 
In connection with Dr. Coleman’s paper, however, it may be 
well at this time to present a few notes concerning these rocks, 
as they indicate that the district in question affords a field of 
much interest for petrographical study. 
The first of the rocks in question was collected by Dr. Selwyn 
in 1882, and is labeled ‘‘ Peninsula Harbor,’ while the second 
was collected by Mr. Peter McKellar in 1870, and is labeled 
‘Mount Point, S.E. side, Peninsula Harbor.” They both come, 
therefore, from the same neighborhood, and probably from the 
same mass. Unfortunately, the specimens cannot at present be 
found, so that it is necessary to base the descriptions on the 
four thin sections in my collection. 
tJour. GEOL., Vol. VII, No. 5. 
322 
