NOVA SCOTIAN GEOLOGY—HONEYMAN. 271 
ArT. VI—ARCHEZAN GNEISSES OF THE COBEQUID MOUNTAINS. 
—MacGnetitic.—By Rev. D. Honryman, D. C. L., 
F.S. A., &e. 
(Read March 14, 1881.) 
THE rocks to which attention is directed were first noticed in 
my second paper on the Geology of the Cobequid Mountains.— 
Tran. 1873-4, Vol. III, page 385. “South of the County line 
(Colchester and Cumberland) we have outcrops of the next band. 
These exposures exhibit much greater variety than was seen 
on the Intercolonial Railway. In one exposure the strata are 
beautifully banded. The dark green homogeneous (microscopi- 
cally) diorites having interbedded red and green gneissoid strata. 
These exposures show massive homogeneous (microscopically) 
Aiarvitase and athara chaw anaicenid and anartwita ctrata+ and the 
ERRATA. 
2? 
-Page 271: for “ microscopically ” read “ macroscopically. 
Page 273, 7th line from bottom of page, and in page 275: for 
“magnetite” read “magnetyte.” 
The special part of the rocks described in the quotation to 
whieh I intend to direct attention, is the “Interbedded red and 
green gneissoid strata.” Specimens of the “red” from a stratum 
four inches thick were closely examined with a view to satisfy- 
ing myself regarding the hornblendic character of the dark lines 
which pervade the red feldspar (orthoclase). Contrary to expec- 
tation I found the lines to consist of magnetite in grains. A little 
hornblende and mica also occur. Thinner red strata as well as 
the green associated, have also grains of magnetite in abundance. 
The magnet readily and beautifully separates the magnetite 
from the pulverized rock. 
The finding of magnetite in the gneisses in sitw, led me to. 
