TINTAH BEACHES NEAK ItOSEAU LAKE. 401 



upper Tintali sliore wiis uot recognized, but three gravel ridges, succes- 

 sively crossed at 2 miles, 2^ miles, and 4i miles northeast from the 1,050- 

 foot beach, with their crests respectively at 1,08(J, 1,088, and 1,092 feet, 

 appear to be lower Norcross beaches. 



Farther to the north the Campbell shore-lines are the highest that have 

 been observed by me on the east side of Lake Agassiz ; but information from 

 others gives approximately the course of the Tintah shores to the interna- 

 tional boundary and the south and west sides of the Lake of the Woods. 



According to Mr. Charles Hallock, the road from Stephen to Roseau 

 Lake runs on a gravel ridge, apparently one of the Tintah beaches, in town- 

 ships 15!J and 160, range 45, passing close along the northwest side of two 

 lakes Crossing the South Fork of Two Rivers about 2 miles northeast of 

 these lakes, the road is described as continuing for the next 15 miles upon 

 this beach ridge or another closely associated with it, lying 5 to 8 miles 

 southeast of the Great Roseau Swamp The beach forms a massive, 

 smoothly rounded ridge of sand and gravel, with pebbles and cobbles up 

 to 4 inches or more in diameter. Its width is 20 to 40 rods, with crest 5 to 

 10 feet above the adjoining surface of till, and it is in many places bordered 

 on the side that was away from the lake by naiTOW swampy tracts. A trail 

 which leaves this road before reaching Roseau Lake and passes east to the 

 Lake of the Woods at the mouth of War Road River is said to lie for 

 considerable portions of its extent on a beach ridge. Tliis also doubtless 

 belongs to one of the Tintah stages, and is, indeed, quite likely the direct 

 continuation of the beach occupied by the Roseau road. 



Dr. George M. Dawson has kindly supplied a manuscript profile of the 

 international boundary from the Lake of the Woods to the Red River, as 

 surveyed by the British Boundary Commission, which shows four low ridges, 

 probably Tintah beaches. They are crossed successively at 12 miles, 22 

 miles, 24 miles, and 32 miles west of the Lake of the Woods, their crests 

 being, in the same order, 1,088 feet, 1,081 feet, again 1,081 feet, and 1,070 

 feet above the sea. The first and second of these ridges are respectively 

 about 5 miles east and 5 miles west of the crossing of the North Branch of 

 the Roseau River, and the fourth is 3 miles west of Pine River. The ele- 

 vation of the Lake of the Woods, varying at its stages of low and high 

 MON XXV 26 



