THE 
AMERICAN GEOLOGIST 
Vol. XIII. JUNE, L894. No. 6. 
A RECONNAISSANCE OF THE ABANDONED 
SHORE LINES OF THE SOUTH COAST 
OF LAKE SUPERIOR. 
By F. B. Taylor. Fort Wayne, Ind. 
(Plate IX.) 
The places described in this paper were visited during -Inly 
and September of L893. With the exception of the localities 
at Sault Ste. Marie and those between Duluth and the Portage 
lake canal, I was accompanied throughout by Dr. Pearce. As 
in the exploration of other regions, including- that of Green 
bay described in the preceding number of the Am. Geologist, 
the particular object of these excursions was to locate, if pos- 
sible, the highest shore line of postglacial submergence. Al- 
though this object was held distinctly in view, our first trip 
was not successful in this particular. The highest shore line 
was not recognized at that time, although it was found later 
that it had been crossed twice. 
Besides other fragmentary shore lines at intermediate lev- 
els, two very strongly developed beaches were found along 
this coast, which mark the most Important epoehsof its recent 
history. One of these is at a low level, not more than fifty 
feet above the present level of the lake at any point observed. 
The other, which marks the upper limit of postglacial sub- 
mergence, is at a somewhat higher level than was anticipated, 
ranging between 535 and 590 feet above lake Superior. The 
lower of these beaches is so favorably situated for observation 
that it was traced continuously for many miles, hut the upper 
one is in a rough and heavily timbered country and was seen 
only in a few places. The development of the latter, however, 
