Canadian Taconic Eruptives. — Winchell. 359 
important, at least in its structural bearings.* In his first 
report on the eastern townships he gives a very full descrip- 
tion of them. The sedimentary beds are described thus: 
These rocks present a considerable variety of characters, embracing 
slates of various colors, purple, black, green and gray, along with sand- 
stones, often so highly quartzose as to form in places a hard quartzyte, 
quartziferous schists and conglomerates. The sandy and quartzose beds 
are very similar to some of the so-called Sillery sandstones of the Quebec 
group, and the few indistinct fossils that have been found in similar 
.slates elsewhere are considered by Prof. Lapworth to be of Cambrian 
age, while other parts of the series may perhaps represent some of the 
lowest members of the same system. 
The Sutton Mountain range, composed of gneissic mica 
schists, is the anticlinal on the flanks of which these volcanic 
rocks lie apparently non-conformably. They are at the same 
time non-conformable below the Silurian, i. e. the "Cambro- 
Silurian." A great variety of volcanic rocks belong to this 
system, as alread}'^ noted, f including diorj'^te, dioritic agglom- 
erate and breccia, dioritic schist, diabase and serpentine. 
"These form a well defined, elevated belt, extending from 
near the Vermont boundary, west of Memphremagog lake, 
with some interruptions for nearly or quite 150 miles." (Ells, 
Report for 1887, p. 28 J.) If these be not a part of the Ar- 
chean fundamental complex, comparable with the greenstones 
of Minnesota, they are a remarkable volcanic group of Ta- 
conic age, and can perhaps be compared with that series of 
Taconic volcanics lately discovered by Van Hise in the Peno- 
kee-Gogebic iron-bearing series of Wisconsin and Michigan.;]; 
From the region of the Taconic in the "eastern townships" 
and the Norian of the Ottawa valley, let the attention of the 
reader be given to that of the original Huronian. The rocks 
of this famous region, which are now well known to be the 
equivalent in the main of the Animikie rocks of the west side 
of lake Superior, consist of a series of slates, fine-grained 
graywackes, quartzytes and marble, interstratified and cut by 
irregular masses of basic irruptives. Structurally, strati- 
*Report on the geology of a portion of the eastern townships. Report 
of Progress, Can. Geol. Siir., New Series, vol. ii, 1887. 
Second report on the geolijgy of a portion of the pr()\ince of Quebec. 
Report of Progress, Geol. Sur. Can., New Series., vol. iii, 1888. 
fAMERicAN Geologist, March , 1895. 
:{:Hull. Geol. Soc. Am., vol. iv, p. 4:5.1. 
