37'J The American Geologist. June, lvu 
const of lake Superior. It is of this sort south of Harvey P.O., 
when- we reached ;t hight at Frazer's Mill of 115 feet, and 
above An Train lake and also on the hills between Munising 
station and Old Munising'. which we saw up to 325 feet. No 
doubt there are shore line forms at intermediate levels in this 
region, but we did not see any very clearly defined. Sonic 
rather doubtful terraces were observed on the steep hillside 
back of the charcoal kilns at Onota, but we did not have op- 
portunity to examine them closely. Seen from the lake, the 
coast at Old Munising looked as though it had been sub- 
merged up to 80 or 90 feet. On the hill about a mile and a 
half south of this place we found washed gravel at about ~"><l 
feet forming a low ridge facing northwest, but could not see 
whether it was continuous. On the top of the cliffs at the 
Pictured Rocks gravelly clay was seen capped by wind-blown 
sand. In Marquette at Seventh and Superior streets there 
are dunes about 150 feet above the lake. 
Five miles west of Marquette on the Negaunee road in Sec- 
tion 30 a very heavily developed shore line was found at an 
altitude of about 590 feet above lake Superior. It is com- 
posed of a series of massive, low beach ridges of sand, gravel 
and shingle making a beach plain about 200 yards wide. The 
ridges are not very clearly defined where we saw them, but 
there is a lagoon behind the upper one along the base of some 
rocky knobs which were formerly sea-cliffs. This great 
beach marks the upper limit of postglacial submergence on 
this coast. About a mile and a half to the east and 160 feet 
lower is another irregular, but heavily developed beach, most- 
ly of sand, which encloses a swampy tract about a mile long. 
There is an old abandoned railroad grade which ascends to 
the level of this beach from the north, and, turning toward 
the west, crosses the swamp. The road from Marquette to 
Negaunee strikes the old grade and follows it across the 
swamp. At the back of the swamp and in front of the upper 
beach there are some coarse gravel mounds which appear to 
be of glacial origin. They are in a rather protected place 
near the head of the swamp. About a mile east- southeast of 
the sea-cliff above referred to. and about a mile south of the 
place where the road crosses the lower beach, is an ancient 
delta of the north branch of Carp river, which flows eastward 
