BEACHES OF LAKE MAUMEE. 715 



the beaches differ but a few feet m altitude (10 to 25 feet), and as topo- 

 graphic maps of the region they traverse have not been made, it will easily 

 be seen that some uncertainty in identification is likely to be felt at points 

 where but one beach is present. It is now known that considerable error 

 of identification has appeared in publications already made by the writer 

 as well as by others. Portions of what was supposed to be the first beach 

 have, upon further examination, proved to belong to the second beach, the 

 first beach having been found in faint form outside of and above the level 

 of the second beach. The first beach has also in one case been taken for 

 the second, and this has led the writer to a serious error of interpretation in 

 the part of the lake border in Ohio between Findlay and Cleveland.^ Rail- 

 way altitudes have been pressed into service wherever obtainable, and these, 

 together with a reexamination of much of the shore since the first publica- 

 tion (in 1892), enable the writer to correct some errors and to understand 

 more fully the difiiculties of correlation. 



The Maumee beaches have been traced eastwai-d from the Fort Wayne 

 outlet to their termini on the south border of the Lake Erie Basin, as 

 described below. They have been traced northward no farther than the 

 Imlay outlet, in Lapeer County, Mich. On the west border of the lake only 

 incidental notice was taken of the second beach, the writer's attention being 

 concentrated on the determination of the extent of the lake and the position 

 and character of its highest shore. 



It was found that the border of the lake is usuall)^ marked by a cut 

 bank or a gravelly ridge, and that the surface inside the lake border is 

 perceptibly smoother than that outside. There are, however, a few places 

 where the waters were too shallow to permit strong wave action, and at 

 such places the margin can be only approximately determined. The extent 

 of the lake is indicated in PI. XXI, but as the scale of the map is small and 

 the variations in the beach are of considerable interest, a somewhat detailed 

 outline of the position and character of the beach will be given. 



DETAILED DESCRIPTION. 



At the point where the upper beach turns into the Fort Wayne outlet, 

 IJ miles northwest of New Haven, Ind., it stands 15 to 20 feet above the 

 floor of the outlet and several feet above the plain back of it. It presents a 



'Am. Jour. Sci., 3d series, Vol. XLIII, 1892, pp. 287, 291-296. 



