WESTERN BLANCIIARD BEACHES. 449 



the Canadian Pacific Railway a mile west of McGregor, where it forms a 

 slight swell on the gentle eastward slope of the Assiniboine delta. On the 

 Manitoba and Northwestern Railway three Blanchard beaches appear to be 

 identifiable, being crossed snccessively 2 miles and three-fourths of a mile 

 west and 1 nnle east of Midway. The upper two are nearly flat tracts 

 of fine gravel and snnd, an eighth to a quarter of a mile wide, at 994 and 

 979 feet above the sea, each being bordered on the west by a depression of 

 about 2 feet and on the east by a gentle slope descending 4 or 5 feet. The 

 third and lowest is a beach ridge of the usual form, about 30 rods wide, 

 with a descent of 5 feet both to the east and west from its crest, which is 

 at 969 feet. After crossing the McCauleyville beaches on the way from 

 Arden to Gladstone the surface is wholly silt and sand, with fine gravel, 

 very flat, excepting these slight ridges and others at lower levels. In their 

 continuation northward, portions of the Blanchard beaches are noted on the 

 plats of the Dominion Land Surveys through townships 15 to 20, range 13. 

 The highest of the Blanchard shores is probably represented on Mr. 

 Tyrrell's map of the Riding and Duck mountains by two observations of 

 beach ridges, namely, on the Oclu-e River, about 8 miles south of Lake 

 Dauphin, at 1,025 feet above the sea; and on latitude 52°, close south of 

 the Duck River, at 1,151 feet. A few miles north of the Duck River the 

 second Blanchard beach, according to my correlation, is shown at the height 

 of 1,135 feet; and the third and lowest beach formed during these stages 

 appears to be represented on the north side of Swan River, nearly 25 miles 

 farther west, by a beach approximately at 1,070 feet, being 100 feet higher 

 than near Midwa}-, on the latitude of Gladstone, about 160 miles distant to 

 the south-southeast. 



THE IIILLSBORO BEACH, 



My only observations of the shore-line in Minnesota which seems ref- 

 erable to the Hillsboro stage of Lake Agassiz, excepting- as already noted 

 with the descriptions of the Blanchard beaches, were in Alma and Wanger 

 townships, Marshall County. 



A somewhat broad beach ridge, 915 to 923 feet above the sea, consist- 

 ing of gravel and sand on an area of till, extends from a cemetery in the 

 HON XXV 29 



