
GLACIAL PHENOMENA AND SUPERFICIAL DEPOSITS. 209 
Woods, a few fossils were obtained. ‘They are not ina very good state of 
preservation, but the following genera are recognizable. Strophomena, 
Pentamerus, Leperditia, Favosites, Stromatopora ; also a few specimens 
of cyathophylloid corals, and discs of encrinal columns. Mr. Billings, 
of the Geological Survey, who has kindly examined these fossils, 
pronounces them to be Upper Silurian forms, though not sufficiently 
“distinct for specific determination. Dr. Bigsby gives the following list 
of fossils from the limestone, as determined for him by My. Salter. A 
small Phacops ; Orthoceras, Favosites Gothlandica, Cyathophyllum, Murchi- 
sonia, Pentamerus Knightii, Leptena, Avicula, <Atrypa, Spirifer. He 
probably enjoyed a better opportunity for the examination of the rocks, 
from the low stage of the water at the time of his visit, and speaks 
of masses ten to fifteen feet broad, and three deep, which though 
cracked and fissured, appear to him to be fixed.* 
475. Least in numerical importance, at the point above referred to, 
are the boulders of Huronian origin, from the region of Clear-Water 
Lake ; consisting of indurated slates, dioritic and epidotic rocks, and 
coarse greenstone-breccia of the kind already described, and with frag- 
ments from four to six inches in diameter. On the shore, in the wash of 
the waves, a fine yellow-white plastic clay is exposed, which may perhaps 
be the representative of the boulder-clay ofthe glacial period. It contains 
much calcareous matter, effervesing strongly with an acid. Some of the 
boulders in this locality show traces of glaciation. 
476. A mile south of Reed River, a second similar point occurs, 
where a ridge with an apparently southern course, comes out on the 
shore. It is covered with boulders in a similar way to the last, and they _ 
occur in about the same relative proportion. Off Buffalo point, which 
separates Reed River and Muskeg Bays, a good many large boulders 
stand up out of the water, and the shore is gravelly, and shows a con- 
siderable quantity of limestone debris. The north-east point of the 
southern promontory of the lake, is heavily glaciated, and shows many 
boulders of Laurentian, some of them forming fine perched blocks. One 
of these, of red granite, and actually lying in the grooves it had made, was 
found to to be eleven feet long by seven feet high. (Plate X., Fig. 2.) 
For several miles south-east of this place, sthe border of the lake is 
moderately high, and whenever exposed, shows whitish-yellow finely 
laminated clay, which contains many pebbles, especially of limestone, 
EES ESS REE he 
* Journ. Geol. Sov., vol. vill. p. 405, 
l4pbD 
