494 TERMINATING SECTIONS ON THE MINNESOTA. 
On the Lesueur River, the magnesian limestone is not visible, but the sandstone 
extends about two miles above its mouth, where it is sixty feet thick. On these 
streams, I’. 1 and F. 2 are lost to view under extensive drift deposits, which occupy 
a great area at the heads of these streams, beyond the limits of the District. No 
crystalline rocks or metamorphic beds were observed on these rivers. 
The table-land, which varies in height from one hundred to two hundred feet, is 
principally composed of an arable soil resting on drift. 
F. 1 and F. 2 of the St. Peter’s and its tributaries retain much the same litholo- 
gical characters which they possess on the Mississippi, many of the individual 
members being diminished in thickness, and even entirely wanting. None of the 
beds of either formation, in this part of the Chippewa Land District, have the 
appearance of being productive either in lead or copper. Section No. 4, 8, on Pl. 
3, N, gives a connected section of the formations on the St. Peter's, from its mouth 
to the granite uplift at Red Wood River. 
