24 PROCEEDINGS OP BROOKLYN MEETING. 



about the south part of this bay, nearly at the level of lake Superior ; at Houghton, 

 on the Keweenaw peninsula, 410 feet ; Sault Ste. Marie, 414 feet ; North bay, 538 

 feet. 



McEwen Beach. — Named by Taylor near North Bay. At Duluth, 350 feet; 

 Schreiber and Terrace bay, 391-2 feet ; Sault Ste. Marie, 365 feet ; North Bay, 488 

 feet. 



ThibeauU Beach. — Named also by Taylor near North Bay. Great Northern rail- 

 way, about two and a half miles northeast of Foxboro, near the line between Min- 

 nesota and Wisconsin, 290-300 feet; mount Josephine, 313 feet; Mackenzie, 327 

 feet; Sault Ste. Marie, 311 feet. 



Double Bay Beach. — At Duluth, 255-260 feet; at Double bay, 279 feet; on Isle 

 Eoyale, about 270 feet ; Carp river, 288 feet. 



First Beaver Bay Beach. — At Duluth, 155-160 feet; at Beaver bay, 173 feet; east- 

 ward represented by two beaches: (a) at Grand Portage, 232 feet; at Carp river 

 and Pie island, 222 feet; at Terrace bay, 243 feet; at Sault Ste. Marie, 224 feet; 

 on the Keweenaw peninsula, 220 feet; (6) at Mazokamah, 214 feet; Terrace bay, 

 228 feet ; Dog river, 216 feet ; Sault Ste. Marie, 208 feet ; on the Keweenaw penin- 

 sula, about 200 feet. 



Second and third Beaver Bay Beaches. — Become three northeastward : At Duluth, 

 85-90 feet; Beaver bay, 126 and 115 feet; Pigeon river (third), 134 feet; Isle Roy- 

 ale, about 130 feet; shore above Carp river, 164, 128 and 122 feet; Port Arthur 

 (third), 149 feet; Silver islet, 168, 161 and 149 feet; Jackfish bay, 176 and 158 feet ; 

 Sault Ste. Marie, 150 feet; Keweenaw peninsula, 170, 150 and 145-125 feet (delta 

 of Huron creek, A. C. Lane). 



Chester Creek Beach.— At Duluth, 45-50 feet; Beaver bay, 80 feet; Isle Royale, 90 

 feet; McKellar's point, 101 feet; Port Arthur, 118 feet; Nipigon, 132 feet; Mon- 

 treal river, 135 feet; Mackenzie, 122 feet. 



BEACH OF THE GLACIAL LAKE ALGONQUIN AND ITS ALTITUDES 



Lake Algonquin, and its highest shoreline, the Algonquin beach, which is here 

 noted, were named by Professor J. W. Spencer.* At Duluth the Algonquin beach 

 is united with the present lake beaches ; at Beaver bay its height is 20 feet ; Good 

 Harbor bay, 27 feet ; Grand Portage, 38 feet ; McKellar's point, 48 feet; Carp river, 

 52 feet; Pie island, 43 feet; Port ArthmvNipigon and Montreal river, 61 feet; 

 Houghton and Marquette, about 25 feet ; Sault Ste. Marie, 49 feet ; near Algoma, 

 60-80 feet ; near North Bay, on lake Nipissing, 140 feet. The Nipissing beach of 

 Mr Taylor, but not his "Algonquin beach' ' on Mackinac island,! which is the highest 

 of the lake Warren shores, being apparently the compound representative of the 

 Belmore and Nelson beaches. 



Western Superior glacial Lake 



The front of the departing ice-sheet was the barrier of the Western Superior gla- 

 cial lake, while the one receded and the other advanced from Duluth northeast- 

 ward to mount Josephine and the most northeastern point of Minnesota and east- 

 ward to Marquette. When the farther glacial recession opened the space for this 

 lake and the similarly expanding lake Warren to be merged together above the 



* Proc. Am. Assoc. Adv. Sci., vol. xxxvii, 1888, p. 199. 

 t Am. Jour. Sei., Ill, vol. xliii, Marcli, 1892, pp. 210-218. 



