14 
MUSEUM BULLETIN NO. 8. 
already described. It does, however, carry the succession found 
in these areas nearer to Sudbury district. There are two series 
of sediments resembling those in Whiskey Lake areas. The 
lower of these is composed, from the bottom upward, of quartz- 
ite, conglomerate, grey limestone, greywacke, impure red- 
weathering limestone and an upper quartzite formation and the 
upper series by a boulder conglomerate, which rests unconformably 
upon the lower series. These rocks are underlain by a greatly 
folded and extremely metamorphosed series of greywacke, slate, 
and quartzite, which is traceable fairly continuously into the 
Sudbury series of Sudbury district. The slate and greywacke 
are mostly recrystallized to mica-schist and hornblende-schist 
characterized by a vertical schistosity, and the quartzites also 
are more or less changed to sericitic schist or massive quartz- 
rock. The immediate contacts observed between these rocks 
and the younger sediments were all fault contacts, but at one 
point where they were exposed within 10 feet of each other the 
quartzite at the bottom of the lower of the two younger series is 
a peculiar arkose extremely rich in dark minerals which possibly 
originated from the underlying mica-schist of the Sudbury 
series by the same process of disintegration as that by which the 
basal arkose in Whiskey Lake and Blind River areas was derived 
from the granite beneath it. No granite occurs in Espanola 
area, but the highly metamorphosed sediments regarded as Sud- 
bury series continue westward along the Canadian Pacific rail- 
way where they are intruded by granite. 
Round Lake Area. 
Crystalline and sedimentary rocks similar to the above are 
present in this area also, but do not afford a good geological 
section. The chief feature of interest is a well exposed intrusive 
contact of batholithic granite with a thick, feldspathic quartzite 
formation which is in continuity with the Copper Cliff arkose 
member of the Sudbury series in Sudbury district, and is almost 
certainly its equivalent. 
