COLONEL WHITTLESEY’S REPORT. 
CHAPTER I. 
SECTION I. 
GENERAL GEOLOGY OF THE DISTRICT. 
THE accompanying map* and section are intended to represent, at one glance, 
the principal features in the geology of this region. The extent, elevation, and 
relative thickness of the various formations, as well of solid rock as the looser earthy 
deposits, will there appear in a more compact and intelligible form than I could 
give them by written descriptions, however elaborate. 
There are four formations or great classes of rocks shown on each section. These 
all appear in the same order of succession, reckoning from the Lake southerly, and 
may be grouped thus: 
1. SEDIMENTARY. 
a. Red sandstone. 
b. Black slate. 
Conglomerate. 
2. TrRappous Rocks, OR THOSE OF VOLCANIC ORIGIN. 
a. Black and red amygdaloid and greenstone trap. 
6. Augitic, hornblendic. and felspathic rocks, embracing syenite and granites 
of the same age. 
3. METAMORPHOSED Rooks. 
a. Hornblendic slates. 
b. Iron slates. 
c. Black slates, in large, thin, rectangular sheets. 
d. Talcose slates, with quartz. 
e. Slaty quartz. 
4. GRANITIC. 
a. Syenite, and 
6. Granite, occupying the country south of the mountain rangé or uplift, and 
are the oldest rocks seen. 
* The geological features of the map here alluded to have been transferred to the general Geological 
Map. The coloured sections accompanying this Report are Nos. 1 , 2, 3, and 4 W. 
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