Some Pro-Glacial Lake Shorelines 
235 
In the table given below, the lake stages are named in chrono- 
logical order; but their shorelines do not have a corresponding 
altitudinal sequence, for the reason that a readvance of the glacier 
covered the overflow channel last in use, and forced the water 
to seek a higher outlet, the lake becoming deeper and submerging 
the shoreline formed when the buried overflow channel was in 
use. The drowned beach would be altered: if not covered by 
a great depth of water, the waves and currents would make it 
^ Taint and fragmentary in any event, the beach would be 
made ^Ttiffer and more firm than ordinary beach soil .... 
by the infiltration of clay.^^^ 
LAKE STAGES IN CHRONOLOGICAL ORDER 
LOCATION OF OUTLET 
ALTITUDE OF 
SHORELINE IN 
NORTHERN 
OHIO 
Highest Maumee, “first” beach . . 
Fort Wayne, Ind 
feet 
790 =t 
Lower Maumee, “third” beach 
(submerged)^® 
Presumably across the Thumb 
of Michigan 
760 
Upper Maumee “second” beach.. 
Fort Wayne, Ind.; Imlay, Mich. 
780 
Arkona (submerged) 
Whittlesey^^ 
Grand River, Michigan 
Ubley, Mich 
700 
735 
Wayne (submerged)^® 
Near Syracuse, N. Y 
660 
Warren^^ 
Grand River, Mich 
680 
Grassmere*^® 
Near Syracuse, N. Y 
640 
Elktoni® 
Near Svracuse, N. Y 
620 
* Ihid., p. 33. 
® Ihid., p. 33. 
Mr. Leverett first called my attention to this interpretation of the “third’’ 
Maumee beach. 
Mr. Taylor first called attention to the Arkona as a submerged beach, and 
showed its time relation to the Whittlesey lake; loc. cit. 
F. B. Taylor, Bull. Geol. Soc. America, vol. VIII, p. 39, proposed this name. 
This was formerly called the Lower Warren beach. Mr. Taylor finds it to 
be older than Lake Warren, by which it was submerged; his interpretation of 
this episode in pro-glacial lake history will appear shortly in Monograph No . — , 
“The Pleistocene Deposits and Glacial Lakes of Indiana and Michigan,” by 
Leverett and Taylor, U. S. Geol. Survey, part II, chapter XVIII. 
The present restriction in the use of the term Warren was proposed by Taylor, 
Bull. GeoL Soc. America, vol. VIII, pp. 56-57, 1897. 
This designation was proposed by Mr. A. C. Lane, Ann. Kept. Geol. Surv. 
of Michigan, 1907, p. 131. 
Also proposed by Mr. Lane, ibid., p. 132. 
