222 The American Geologist. April, ibos 
the Schroon drainage will be readily sviggested by inspection 
of the map. The sharp elbows and rectangular blocks are 
even more conspicuous upon the contoured sheet than in the 
accompanying map. The valley of New pond is practically 
continuous with that occupied by the upper transverse tribu- 
taries of Lindsay and West Mill brooks, and with the valley 
of Niagara brook. In a similar way the valley of Ash Craft 
brook continues southwest to Lindsay brook. Mill brook 
and Newport brook show a similar alignment with each other. 
It is quite possible that the Boquet has robbed some territory 
from the Schroon, because of its much more rapid descent and 
much shorter distance to the baselevel. 
If the northeast southwest valleys are due to faulting, the 
long, intervening mountain blocks may have been cut up into 
short rectangles chiefly by the northwest heading of trans- 
verse streams as above described. This work seems to have 
diverted and checked the growth of some streams along the 
great structural lines. Old as the region is, adjustment ap- 
pears to be by no means complete. 
SOME RESEMBLANCES BETWEEN TH E ARGHEAN 
OF MINNESOTA AND OF FINLAND.* 
By N. H. WiNCHELL, Minneapolis. 
In several of the reports of the Minnesota Survey some 
characters of the Archean have been described which have ap- 
peared to be unique, since they have not been mentioned else- 
where in the lake Superior region. The non-observance of 
these characters by other geologists has rendered it necessary 
to be cautious in drawing final conclusions as to their origin 
and significance. Hence some of the interesting localities 
have been examined several times, and additional details and 
sometimes new interpretations and new facts bearing on the 
genesis and succession of some of the parts of the Archean 
have been derived from these later visits. 
It was during the latter part of the summer of 1897 that 
*Read before the Minnesota Academy of Natural Sciences, Dec. 30th, 
1897. 
