of Lake Superior. 2G 1 



extremity of the great peninsula of KewUweenon. In traversing 

 around this peninsula, they must pass a small bay and point of 

 rock, known among the Canadian boatmen by the name of ' La 

 Roche Verte,' which is, iu fact, the vein of copper ore, where it 

 juts abruptly upon the lake. The vein of ore is about one 

 fathom in width, rising with a broken surface out of the water, 

 and it extends in a direct line from the lake into the interior ; 

 its course being marked upon the bed of the lake, by a broad 

 green stripe, seen through the water, and upon the shore by pa- 

 rallel walls of the enclosing rock which constitutes the matrix to 

 the ore." 



From the west side of the Portage of Keewawoonan to the 

 Porcupine Mountains, the lake shore, excepting some red sand- 

 stone off the Iron River, and a few other limited spots, consists 

 of sand, here and there intermixed with clay and bowlders ; and 

 extending far into the interior, as is well-exemplified on the 

 upper parts of the Copper-Mine River. I have seen porphyritic 

 red granite with large plates of mica from the Porcupine Mountains. 

 Between the Black* and Montreal Rivers, and for four miles be- 

 yond the latter, there is an extensive range of cliffs of red vertical 

 sandstone, capped by a bed of red clay twenty-five feet thick, and 

 bearing poplars and birch. 



From the last-mentioned place the remainder of the coast to 

 the St. Louis, including Point Cheguimegon, the headland opposite 

 to the " Twelve Apostles," and the south shore of the Fond du 

 Lac, is wholly lined with sand which is often ferruginous ; and is 

 backed by hills of the older rocks. Mr. Thompson has remarked, 

 that the sands forming the beeches of the south shores of Lake 

 Superior, often stretch in rude terraces, and a sort of thinly- 

 wooded country, far into the interior ; and fur traders have stated 

 to me that many of the small lakes, an hundred miles or more on 

 the south, are surrounded by sandy barrens of irregular and great 

 extent. 



♦ Not named by Mr. Tliompson ; but Mr. Schoolcraft inakua it twenty-one 

 miles fast from Montreal River. 



