452 THE GLACIAL LAKE AGASSIZ. 



feet, and 1115 feet, represented successively liy the western escarpment of 

 silt, the eastern escarpment of till, and the shore deposit of sand and gravel 

 at Mr. Kingman's house. Elsewhere these stages seem to be united, unless 

 the lower one was also observed, as before noted, in Marshall Countv, Minn. 



Where it is crossed by the Great Northern Railway, 2 miles south of 

 Cummings, the Hillsboro shore is an eroded escarpment of till, ascending- 

 somewhat steeply 8 or 10 feet, with no considerable beach deposits. Con- 

 tinuing thence on the east side of the railway for 12 miles northward by 

 Cummings and Buxton, it is marked through nearK^ the entire distance by a 

 conspicuous beach ridge of gravel and sand, bordered on each side by till. 

 The crest of this beach is 925 to 930 feet above the sea, with an average 

 descent of 10 feet to the east and 5 feet to the west. At its next intersec- 

 tion by the railway, 1 ^ miles south of Reynolds, the gravel and sand of the 

 beach have been extensively excavated for railway ballast. The ridge 

 there is about 30 rods wide; the elevation of its crest is 928 feet, and its 

 slopes to the northeast and northAvest fall respectively about 8 and 6 feet. 



Through its further course of about 100 miles in North Dakota this 

 shore-line runs to the northwest and north-northwest, excepting that it 

 deviates to a north-northeastward course for 15 miles, between the North 

 Branch of Pai'k River and Tongue River, turning thus aside to pass by the 

 Pembina delta. In section 27, Michigan, about 3 miles northwest of Rey- 

 nolds, the crest of its beach ridge is 926 feet above the sea, having a descent 

 of 6 feet eastward and 3 feet westward. In section 1 6 of this township the 

 beach is a broad, flattened ridge of sand and fine gravel, about 40 rods 

 wide, with top at 923 to 926 feet. It slowly rises 10 feet above the flat 

 surface of till on the east, and descends 3 to 5 feet westward to a depression 

 which is partly a grassy slough mown for hay. Through its next mile 

 northwestward the shore is an escarpment of till, rising a few feet, with its 

 crest at 923 feet. 



No exact determination of the heig'ht of the IIillsl)oro shore was obtained 

 along its next 25 miles to the southeast part of section 25, township 153, 

 range 54, about 2 miles west of Beans station, on the Duluth and Manitoba 

 Railroad, where the crest of its gravel and sand ridge is very nearly 930 

 feet above the sea. Again, about 2 (J miles farther north the beach ridge 



