GABBEOS OF EAST SOOKE AND EOCKY POINT. 
23 
abrupt, whereas on mount Maguire the changes are much less 
so. In two places, near Beechey head, the anorthosite was seen 
definitely to intrude the olivine gabbro, in the form of well- 
defined dykes. 
The granite on Possession point is distinctly intrusive into 
the augite gabbro, and forms an extensive contact breccia with 
it. However, Clapp found that in other bodies of the Sooke 
gabbro the granite portion is clearly gradational into the under- 
lying gabbro. It is assumed, therefore, that the granite of the 
East Sooke intrusive also once possessed a gradational relation 
to the basic rocks, and that this relation was obliterated by move- 
ments which, as will be shown, took place before solidification, 
as the gradational relations of the gabbros to each other were 
partly obliterated. 
The following quotation from a recent report by Clapp 1 
makes clearer the relations of the granite and gabbro as found 
by him in the other masses of the Sooke map-area : 
“ At several places, in fact along all of the exposed contacts 
between the two, the gabbro, which greatly predominates, and 
the granite may be seen to grade into one another within a dis- 
tance of one to three feet. At most places the two rocks main- 
tain their normal character to the narrow transitional zone, 
though usually the gabbro is more feldspathic near the transi- 
tional zone than is normal elsewhere. In a few places, as to the 
southeast of Empress mountain, the gabbro is fine-grained and 
porphyritic near the transition, and even the granite is fine- 
grained. In the vicinity of Empress mountain the granite clearly 
overlies the gabbro, and grades abruptly downward into it. . . 
. . . . The granite forms two or three small knolls about 
100 feet high surmounting the gabbro ridge; and a mile to the 
southeast of the summit of Empress mountain the granite occurs 
at the top of the intrusive stock, forming a zone or layer 100 feet 
or more in thickness capping the gabbro and immediately under- 
lying the apparently flat roof of Metchosin volcanics . . . . 
At several places the granite forms irregular masses, many of 
i Clapp, C. H., Geol. Surv., Can., Mem. 96, p. 298. 
