Abandoned Shore Lines of Lake Superior, — Taylor. 373 
and, after joining the main river, empties into lake Superior 
south of Marquette. This delta is cleared and cultivated and 
has a farm house upon it. It was not examined closely, but 
its level is nearly that of the highest beach. 
Besides these positive evidences of submergence at this 
high level, we found equally impressive evidence that submer- 
gence .did not reach higher levels. Continuing on the same 
road towards Negaunee, we crossed a low divide about 80 
feet above the highest beach and found ourselves in the val- 
ley of the north branch of the Carp river about three miles 
east of Eagle Mill and ten feet above the beach. This valley 
is filled with terraces and gravel plains on a large scale. They 
may be seen to hest advantage about a mile and a half east 
of Eagle Mill near the site of an old abandoned iron furnace, 
where the road ascends to the upper level of the gravel plain. 
The plain has been partly cut away by the river, leaving bold 
terraces on both sides about 4() feet above it. On the south 
side the plain is wide and the road follows it continuously to 
Eagle Mill. This station is on the main stream of Carp river. 
but the gravel plain extends across from one stream to the 
other a distance of more than a mile. The plain is very 
sandy, but the sand is mixed with a considerable portion of 
gravel and pebbles with a few boulders, all waterworn. No 
doubt the gravel plain extends down the valley of the main 
stream to another delta, but we did not have time to visit it. 
The top of the gravel plain at the old furnace is about 50 
feet above the beach at the old sea cliff. There are immense 
glacial terraces at higher levels in the same vicinity; but 
they are not easily mistaken for those of later age. for their 
composition and position are (dearly glacial. We drove to 
the top of one of these about a quarter of a mile northwest 
of the station of Eagle Mill where, at an altitude of about 
110 feet above the station or TitO feet above the lake, we had 
a magnificent view eastward over the gravel plains and ter- 
races. Fragments of these gravel plains extend down to tin- 
head of the delta of the north branch of Carp river, already 
described, showing that the same conditions which led to tin- 
formation of tin- delta were also the cause of the gravel plains 
extending back to Eagle Mill. On tin- higher ground, above 
the level of the beach at 590 feet, we saw no trace of a shore 
