. 
Y 
UNCONFORMITY ON KETTLE RIVER. 245 
in the bed of the stream, or in cliffs 20 to 75 feet high, on either side, for 
5 miles, to the north line of Sec. 35, T. 43, R. 20 W. Above this for 33 
miles the sandstone does not appear in the river, but is seen here and there 
ec. COT. 
on hillsides near the stream. Through 
sections 11 and 3, T. 43, R. 20 W. the 
sandstone reappears in the stream, the 
last exposure found lying 200 paces 
south of the north line of section 3. 
From this point up stream for 
some nine miles no exposures were 
found. Then, through sections 9 and 
4, of T. 45, R. 20 W., and 32, 29, and | 
28, of T. 46, R. 20 W., frequent out- eae 
crops of mica-schist are met with in, 
NRO W OSs 
ota, : 
the hillsides near the river. 
These briefly-stated facts with 
regard to the region of the Snake and 
Kettle rivers, further illustrated by 
the map of Plate XXIV, will serve to 
render certain three very important 
F, i 4 Scale 1)mile to 4. inches. 
conclusions, viz: (1) the diabases and Gh post ees 
diabase-amygdaloids and interbedded Fie. 8. —Map of Exposures on Kettle River, Sec. 
os . 22 teal wives CONN cs Minnesota. Scale 4 inches to 
porphyry-conglomerates Ou tMISMCIS= theme: 
trict are in all respects like those of Keweenaw Point; (2) the light-colored 
horizontal Cambrian sandstones overlie these beds unconformably; (3) these 
Keweenawan beds, with a trend but little east of north, present an easterly 
dip which at from 5 to 8 miles west of the Saint Croix reaches 50° to T° 
and which flattens rapidly eastward, becoming very low on the Saint Croix 
Fic. 9.—Section on line A B of Fig. 8. Scale, horizontal, 8 inches to the mile; vertical, 300 feet 
to the inch. 
itself. The first two of these conclusions are but confirmations of those 
reached farther down the Saint Croix, but the last is of the greatest interest 
