408 THE GLACIAL LAKE AGASSIZ. 



PROM LAKE TRAVERSE AND CAMPBELL NORTH TO THE TAMARACK RIVER, IN 



MINNESOTA. 

 (PLATES xxin-xxvi.) 



For a distance of aljoiit 18 miles north from the mouth of Lake Agassiz 

 the Campbell shore-line is within a half mile to 1 mile east of the marsh 

 with lakelets and of the Bois des Sioux River, tlu-ough which Lake Trav- 

 erse outflows. Perhaps, however, it would be better, at this stage of the 

 decrease of Lake Agassiz in area and depth, to regard its mouth and 

 the beginning of the River Warren as transferred from Lake Traverse 12 

 miles north to the vicinity of White Rock. 



Parting company with the Bois des Sioux 5 or 6 miles nortli of White 

 Ruck, the Campbell shore runs northeastward across Campbell Township, 

 passing less than a mile north of Tenney station, on the Minneapolis and 

 Pacific Railway, and crossing the Breckenridge line of the Great Northern 

 Railway at Campl^ell. Near the center of section 31, Campbell, it is recog- 

 nized by a lieach ridge which has been excavated for masons' sand. On the 

 Minneapolis and Pacific Railway the crests of its scanty gravel and sand 

 deposits are 980 to 983 feet above the sea; and on the Aberdeen Branch of 

 the Great Northern Railway the top of the beach is at 989 feet, with 

 adjoining- land on the northwest 5 feet lower. The vicinity of the town of 

 Campbell, however, has no definite ridge. A half mile to 1 mile north 

 of Campbell the beach is dimly traceable, with crest at 984 to 986 feet, 

 rising only 2 to 3 feet above the general surface; and it has the same 

 inconspicuous development in its course thence nearly due north to the 

 Red River. 



In the northeast part of Richardson this shore bears a well-defined 

 ridge of gravel and sn.nd, which runs through the center of section 14 and 

 the east part of sections 11 and 2. It has been excavated in the southeast 

 qimrter of section 11, showing pebbles up to li inches in diameter. The 

 crest of the beach ranges in height from 987 to 995 feet, from which there 

 is commonly a descent of 2 to 5 feet on the east and twice as much on the 

 west to the general surface of till. This beach, about 30 rods wide and 5 

 feet high, with its top at 992 to 995 feet, is crossed by the Noi'thern Pacific, 



