The Second Lake Ahjon<jinii. — Taiilor. 107 
around the northern shore of Green bay. But it was not found 
south of Escanaba. From Sault Ste. Marie to the vicinity of 
Old Munising, the Nipissing beach on the Superior shore de- 
clines about 25 feet. Supposing it to have the same declina- 
tion on the south side of the peninsula, and starting at 45 
feet at Mackinac, it ought to appear at the north end of 
Green ba.y at an altitude of about 20 feet, und there is a 
strong shore line there approximately at that hight. It is the 
wide flat upon which the higher parts of the towns of Glad- 
stone and Escanaba are built. Back of the former place its 
upper mark is strong and plain against the foot of a high 
steep bluif. The blutf was described in the third paper of the 
above list, but b}'- an oversight the lower wide terrace at its 
fo©t was not mentioned. It was at this time also that the 
spit at Fayette on the Garden peninsula was made. The 
heavy beach gravels of the low Nahma peninsula opposite 
Gladstone probably belong to the same time. The upper 
beach, which is also a strong one, descends gradually south- 
ward on both sides of lake Michigan and lies only 50 to 75 
feet above the Nipissing beach where the latter was last seen 
toward the south. The declivity of the upper beach grows 
less toward the south and it there forms a plane nearly paral- 
lel with that of the Nipissing. Possibly the earlier observa- 
tions of Dr. Andrews and Mr. Bannister carry the identity of 
some of these beaches farther south. But although 1 have 
not yet seen their papers, it seems improbable that such is the 
case. For, as is stated in the third paper, the upper beach 
passes under lake Michigan on the west side at Two Rivers. 
On the east side it is estimated to pass under the lake at a 
point about 60 or 70 miles south of Traverse City, probably 
near Ludington or Pentwater. The higher 1)eaches described 
by these observers and by Mr. Leverett* at points farther 
south, certainly have no extension in the north. They are 
probably fragmentar}^ and mark the shores of a lake of the 
glacial recession which had its outlet at ('hicago. It is esti- 
mated that the Nipissing beach passes untler the present lake 
at points about 80 miles north of Menomiiu'c and 15 miles 
north of Traverse City. Neither the Nipissi ng nor the upper 
*'-Rai,swl Hcachcs of l.akt," Michi<ran," by Frank l.oviTelt. Wisconsin 
Acad. Sci. Trans., vol. 7, p. 177-lifi. ISSi). 
