THl Rl C ORDS c)l ALGONQUIN T I M Iv 



photo by Michigan Depdrtmcnl of CoHtervtliom 



PLATE J.— SUGAR LOAF ROCK, MACKINAC ISLAND 



A LIMESTONE REMNANT OI THE ANCIENT ALGONQUIN SHORE, NOW FAR 

 INLAND AND ABOVE LAKE LEVEL. 



the beaches, so that the chffs now rise sheer from the Huron 

 to the old Algonquin shore, but the general view of the island 

 is of land rising by great steps from Lake Huron. 



Interesting and arresting are these raised beaches, with 

 their arched rocks, wave-cut cliffs, sea caves and grottos, and 

 shingle beaches high above lake level; they tell a story not only 

 of rising and falling water but of a rising land. If we sail 

 along the lakes we see the interesting rocks, like little ships, 

 cut from the mainland and jutting into the lake at the tip of 

 the Thumb of Michigan — at Pointe Aux Barques. They are 

 cut in the rocky shore cliff of Lake Algonquin, which at the 

 Pointe is only ten feet above the level of Lake Huron; but 

 when we reach Mackinac we find the same shore — which we 



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