MINERALS AND GEOLOGY OF CANADA. 435 
rence in those feldspathic beds. The Laurentian deposits of the 
counties of Montmorenci (below Quebec), Terrebonne, &c., afford 
good examples of Feldspar Rock. (See Analyses, &c., in Mr. Hunt’s 
Report for 1854.) 
Hornblende Rock.—This rock, frequently of a schistose structure, 
and then called ‘“‘ Hornblende Slate,” or ‘ Hornblende Schist,’’ is 
normally a compound of quartz and hornblende. Very often, how- 
ever, it is nothing more than a highly hornblendic variety of syenitic 
gneiss. It bas a dark-green or black colour, and frequently contains 
garnets in sharply-defined crystals. Hornblende rock occurs in some 
abundance amongst the Laurentian strata, as in the counties of Lanark, 
Frontenac, Lennox, &c. Also ix the valley of the Bonne-chére (Mr. 
Murray) ; on French River, Lake Huron; and at other localities in 
which these strata prevail. It occurs likewise amongst the more 
modern metamorphic series south of the St. Lawrence. In the 
latter district, a rock made up of greyish-green actynolite, in inter- 
lacing fibres, is found in Beauce County. (Mr. Hunt’s Report 
for 1856.) 
Wollastonite Rock.—Wollastonite, or tabular spar, is a mineral 
closely related to augite. (See its description in Part II. above, 
Vol. V. page 528.) Mixed with the latter species, it forms subordi- 
nate beds, associated with crystalline limestones, amongst the Lauren- 
tian strata of certain localities. 
Garnet Rock.-—Beds of light-coloured massive garnet occur amongst 
the metamorphic series of the Eastern Townships. (Mr. Hunt's 
Report for 1856.} Certain subordinate beds, made up in chief part 
of granular garnets of a red colour, are found likewise in connexion 
with crystalline limestone amongst the Laurentian strata, as in the 
County of Argenteuil, and elsewhere. (See Part II. Vol. V. p. 524; 
and Sir W. E. Logan’s Report for 1856.) Mr. Richardson, in his 
Report for 1857, describes also the occurrence of garnet rock in asso- 
ciation with micaceous schists, at Baie St. Paul. 
Chlorite Slate.—This rock, of a greenish colour, and normally of a 
schistose structure, occurs both amongst the Laurentian and Huronian 
series, and the more modern metamorphic strata of the Eastern 
Townships. All of these chlorite-slates contain a certain amount of 
water. In the Eastern Townships they pass into more or less compact 
“‘potstones.”’ (See Part II. above, page 160.) 
Tale Slate.—The rock thus named occurs principally in the Eastern 
