60 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VoL. VI. 
Along the eastern part of the south shore of Lake Superior, glacial 
striz are not seen, the rocks being mostly buried under sand and other 
superficial deposits. The general trend of the striz is increasingly 
deflected to the westward of south as we proceed towards the western 
extremity of the lake. 
The drift or till which is very heavy towards the western part of the — 
south side of Lake Superior is all red, owing to the colour of the 
sandstones, marls, etc., from which it has been derived, to the east and in 
the bottom of the lake. Around Thunder Bay and at other places on 
the northwest side of the lake, the glacial grooving has a_ westerly 
course and the debris of the red marl of the lake-basin has been carried 
out west over the land for a distance of fifty miles or more. In many 
places on the east shore, the striza run up from beneath the water and 
continue inland with an easterly bearing. It is well known that the 
peculiar form of red jasper conglomerate, which, as far as we are aware, 
is found z7 szé# only at the north end of Goulais Bay and north of the 
St. Mary’s River, has been carried east with the drift all along the north 
shore of Lake Huron, from which it has been subsequently moved south 
and southwest by a more recent and probably lighter system of 
glaciation. Along the west side of Lake Michigan the striz are 
reported to have a course west of south. The ice-sheet which produced 
the striee either passed the side of the driftless area or did not extend to 
it. We may therefore conclude that to whatever extent the basin of 
Lake Superior was deepened or enlarged by glacial action the excavated 
material was carried mainly to the west and east and failed to reach the 
driftless area of Wisconsin. 
