GLACIAL LAKE ALGONQUIN. 427 



Leland the same condition is repeated, but the high ground is only a mile long. South and 

 southeast this small remnant is tied to the mainland by strong Algonquin bars. 



The Fox Islands, 15 miles northwest of Northport, have not been visited, but a distant 

 view indicates that they do not rise to the level of the highest Algonquin beach, except in dunes. 



North Manitou Island is a high morainic mass, nearly all of it rising above the upper Algon- 

 quin level. Only the southern end is below it. The Algonquin beach is well developed on the 

 southwest side. At the landing on the east side it is sandy and ill defined but has a low cliff 

 behind it. Toward the north it is gravelly and stronger and toward the south it is marked by a 

 high lake bluff. South Manitou Island is also nearly all above the Algonquin level and the 

 beaches are finely developed on the east side around the harbor. 



South of Good Harbor, on the mainland, the Algonquin beach runs over 4 miles inland 

 around the south side of Lime Lake and around Bass Lake, 2 miles to the northwest. Both 

 of these lakes were locked in by Algonquin barrier bars. 



The great headland at P3'ramid Point was an island in Lake Algonquin. The Algonquin 

 beach appears on its south and east sides, but has been entirely cut away on its west and north- 

 west fronts. Another island lay just south at Port Oneida and was cut off at its north end. 

 The beautiful Glen Lake is surrounded by the Algonquin beach quite distinctly developed. 

 At the north this lake was shut off in part by Algonquin bars, and a trough which runs northwest 

 from its western end is now buried under great dunes which extend northward to Sleeping 

 Bear Point. From the north side of Glen Lake a high ridge runs northwest past Glenhaven 

 to where it is cut off at the present shore and forms the foundation under the great dunes. The 

 Algonquin beach is a wave-cut bench and lake bluff on the north side of this ridge and projects 

 as a strong, high spit eastward from it. South of the west arm of Glen Lake another truncated 

 headland presents a high bluff for 2 miles. Then for 3 miles north of Empire the Algonquin beach 

 is finely developed at the back of a shallow embayment. For 2 miles south of this place the 

 Empire bluffs present another great truncated headland, where the beaches are all cut away. 



From Aral the Algonquin beach runs south about 8 miles on the east side of the Platte 

 Lake embayment, the head of which is a little west of Honor. Here it turns and runs west 

 about 8 miles to the present shore a mile north of the west end of Crystal Lake. The Algon- 

 quin beach is well developed on both sides of this embayment, especially in its outer parts 

 near Lake Michigan. Gravel ridges and bars are developed in fine forms westward from the 

 south side of Platte Lake. 



A high drift ridge on the south side of Crj^stal Lake and a lower one on the north side run 

 out to the present shore. Both were cut off by the Algonquin waves, and the north one has been 

 truncated by the present lake. At the east end of Crystal Lake the upper Algonquin appears 

 as a great, flat, barrier ridge spanning the head of the valley at Beulah. Evidently the west 

 end of Crystal Lake was not closed when this beach was made. 



At Frankfort the embayment entering from Lake Algonquin was small and narrow and 

 the beach is poorly formed, the highest being either absent or not clearly marked. 



At Northport and Leland the lower members of the upper Algonquin group are generally 

 represented by from one to three or four ridges below the highest. But the interval above the 

 Nipissing beach grows less toward the southwest and from the vicinity of Platte and Crystal 

 lakes south the exposures are poor and the upper group is represented by only one or two faint 

 ridges close below the highest; probably by only one, for the Battlefield and Fort Brady groups 

 are in all probability represented by the first and second ridges above the Nipissing. Farther 

 south the only strong Algonquin is the upper one, and this being only 10 to 12 feet above the 

 Nipissing leaves little room for the lower ridges of the upper group. 



Between Northport and Frankfort the headlands are still pronounced salients, though 

 truncated, and the shore lakes locked in by bars are relatively large. On this stretch of shore 

 the Algonquin, Nipissing, and modern lakes have done their shore work at distinctly separate 

 levels and the reduction of the shore to a nearly straight line has not been accomplished. 



Southward from Frankfort the conditions were somewhat different. The headlands were 

 not so long nor the embayments so deep. The nearness of deep water to the present shore 



