NE-SAW-JE-WON 



photo by Michigan Department of Conservation 



PLATE 4.— ARCH ROCK, MACKINAC ISLAND 



A SEA ARCH CUT IN LIMESTONE OF THE ALGONQUIN SHORE. THE 

 NIPISSING BEACH BELOW HAS BEEN DESTROYED BY MODERN WAVE ACTION. 



land route" of lakes and low portages between Cheboygan 

 and Petoskey is a channel of the Algonquin archipelago. The 

 interesting cliffed scenic beauty of Mackinac Island was pro- 

 duced by the work of the ancient lakes. During Algonquin 

 time Mackinac Island was triangular in shape and only about 

 three-fourths of a mile long, rising eighty feet above the lake 

 level. On its shores the beating waves of Lake Algonquin 

 carved Sugar Loaf and Arch Rock. From this small ancient 

 island Mackinac slopes by cliff and terrace to the present 

 lake level. Each terrace and its backing cliff represents a level 

 of the ancient lakes as well as a step in the slow uplift of the 

 continent. In places the waters of later lakes have cut into 



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