MISSISSINAWA MORAINE. 507 



Near Lagro, on the south side of the Wabash Rivei", remnants of a 

 terrace, standing 50 to 60 feet above the present stream, were noted on each 

 side of the mouth of the Salamonie River. Their altitude seems to be too 

 low to permit connecting them with the terrace at Wabash, yet no evidence 

 of terraces at higher altitudes was found. It is possible that these terraces 

 represent the stage of water in the valley at the time the Salamonie moraine 

 was foi'ming, and that the terrace at Wabash was formed by a stream whose 

 head was below Lagro, since the outer border of the Mississinawa moraine 

 crosses the Wabash River between Lagro and Wabash. A more detailed 

 examination will, however, be necessary to determine the relationship of 

 these terraces to each other and to the ice margins. Very little terrace 

 material remains above Lagro, the valley having been swept clean by the 

 waters of the lake outlet. 



The Mississinawa River was very favorably situated to be an outlet 

 for glacial waters from the Mississinawa moraine, its course being along the 

 outer face of the moraine for many miles, and its discharge being unob- 

 structed by the ice sheet or otherwise hindered. It does not, however, 

 carry evidence of vigorous g-lacial drainage. Its valley, throughout much 

 of the distance from the State line to southern Wabash County, follows 

 closely the outer border of the moraine and occasionally enters it sufficiently 

 for morainic knolls to appear on its southwest bluff. No gravel apron was 

 found between the moraine and the river, and the river bluffs are, as a rule, 

 composed of till from top to bottom. From the point where the river leaves 

 the moraine, in southern Wabash County, to its mouth gravel deposits are 

 more abundant than above that point, but no well-defined gravel apron or 

 moi-aine-headed terrace was noted at the point of departure from the 

 moraine. It seems necessary, therefore, to assume either that there was 

 but little discharge of waters, or that there was such a balancing between 

 the material contributed and the carrying power of the stream that but little 

 material was deposited along its course. The valley is not large and may 

 well be the product of a postglacial stream, a fact which goes to indicate 

 that the discharge of glacial waters was light. 



In the Ohio portion of the outer border district a broad swampy plain 

 is found along the headwai ers of Stillwater River, a stream which for several 

 miles follows the outer border of the moraine. Tlie plain carries no decisive 

 evidence of vigorous glacial drainage. It is covered to a depth of 2 to 6 

 feet witli a silty deposit, but does not appear to be underlain extensively 



