PF.XUOSE.] 
APATITES OF CANADA. 
25 
thirty-nine hundred feet. All the beds are more or less completely 
metamorphosed, being sometimes indistinctly stratified and at other 
times massive and with no traces of bedding. The rocks, often con- 
torted, all dip at a vertical or almost vertical angle. Sometimes the 
gneiss contains large quantities of mica and has a distinctly foli- 
ated structure. At other times it is impregnated with large quanti- 
ties of pyroxene, as in the Quebec district. In the Ontario district 
this pyroxene is often replaced by hornblende of a dark-green, lus- 
trous character. A highly garuetiferous gneiss is also often found 
in large quantities in some of the apatite localities. In the Que- 
bec district there is a series of trap dikes running in a general cast 
and west direction. By some they are supposed to be connected with 
the occurrence of the apatite. But the trap is; probably, of a later date 
than the apatite, as it is sometimes found passing through pockets of 
that mineral (Fig. 4). 
Fig. 3. Section on south side of hill on north side of Kbeaurao Lake, Templetou, Ottawa County, Que- 
bec, Canada. A, stratified rock; B, pyroxene; C, feldspar. Scale: 1 incb = 16 feet. 
The principal difference between the country rock of the Quebec dis- 
trict and that of the Ontario district is that the rocks in the latter re- 
gion are often muc h more hornblendic than those in the former, and 
are often found in the form of a more or less hornblendic gneiss. The 
country in. the Quebec apatite district is rough and mountainous. The 
hills are of a remarkably uniform height, rarely rising over five 
hundred to six hundred feet above the level of the neighboring Du 
Lievre River. In Ontario, on the other hand, the land in Leeds, 
Lanark, Frontenac, and Addington Counties* ia low, and sometimes 
shows a smooth, glaciated surface, covered by a thin layer of soil. 
In Renfrew County, however, the land is more hilly, and resembles 
that of the Ottawa district. As before remarked, the apatite occurs, 
almost without exception, in association with pyroxenic or hornblen- 
dic rocks. This rule holds especially true in the Quebec district, 
(499) 
