288 THE GLACIAL LAKE AGASSIZ. 



In the next 2 miles northwai-d, through sections 10 and 3, Humboldt, 

 the beach is nowhere well marked as a ridge, but is mainly a belt of gravel 

 and sand, lying on a slope of till, which gradually rises 30 or 40 feet higher 

 at the east. The lack of typical beach deposits on this shore through the 

 north half of this township is probably due to its sheltered situation in 

 the lee of islands on the northwest. The course of the shore currents, 

 determined by the prevailing winds, seems to have been southwai'd, as on 

 the shores of Lake Michigan. 



Highest part of southern island in the east edge of Lake Agassiz, in 

 the northeast quarter of section 5, Humboldt, extending northward into 

 Ski'ee, 1,117 to 1,122 feet. This island was about 1 mile long from south 

 to north. Crest of beach on its west side, a well-developed ridge of gravel 

 near the middle of the north line of section 5, 1,095 feet; and for a third of a 

 mile north-northwest from this, 1,094 to 1,096 feet. On the east side of 

 the beacli, as it continues northward, is a slough two-thirds of a mile long 

 from south to north and about 30 rods wide, 1,085 feet. This was evidently 

 filled by a lagoon, sheltered on the southeast by the island and separated 

 from the main lake by the beach. Toward the northeast it widened into a 

 shallow expanse of water 8 to 15 feet deep, about 1^. miles wide, divided 

 from the broad lake on the. west by two islands and this beach or bar which 

 connected them. Lake Agassiz here appears to have stood at the height of 

 1,090 to 1,095 feet. 



Top of the beach or bar in the north -paH of section 32, Skree, a broad 

 rounded ridge of gravel, with pebbles up to 3 or 4 inches in diameter, 1,103 

 feet, and through the next half mile, in the south half of section 29, 1,102 

 to 1,104 feet. Along part of this distance the beach ridge is bounded east- 

 ward by a steeper descent than usual, the land next east being 1,085 to 

 1,090 feet above the sea. This beach or bar continues northward in a 

 typical ridge tlu'ough sections 29 and 20, same township. 



Beach or bar at L. Williams's house, in the southeast quarter of section 

 20, Ski-ee, 1,101 feet; a quarter of a mile farther north, 1,106 feet; three- 

 quarters of a mile north of Mr. Williams's, near the middle of the north 

 line of section 20, 1,110 feet, continuing a veiy definite ridge through the 

 south half of section 17, 1,109 to 1,110 feet. 



