134 Feather stonhaugWs Geological Report. 



miles, appearing like the remains of a castle, or a church with 

 a cupola. The total height is ninety feet, the lower part be 

 ing about sixty feet high and twenty-five feet in diameter : 

 the upper part is thirty feet high and varies from two and a 

 half feet to fifteen feet diameter. I had these particulars from 

 a gentleman who had visited the place and taken a drawing 

 of it, of which he presented me a copy. 



The banks of the river now gradually lose their escarped 

 character, the left bank especially being low and rolling, hav 

 ing generally a gentle slope of grass and trees to the water 

 side, and rarely exceeding one hundred feet high. About 

 forty miles from Lake Pepin, St. Croix river comes in from 

 the left bank, about 120 yards wide. This stream, after fol 

 lowing it north about two miles, expands into a small lake of 

 nearly the same breadth. Beyond the St. Croix the Missis 

 sippi becomes narrow, and at one place, where the limestone 

 beds on the right side come to the waters edge, is only about 

 one hundred yards wide, and winds very much. From thi& 

 place I could hear distinctly the noise of the falls of St. An 

 thony. Four or five miles before reaching trie village oi 

 Tchaypehahmonee, or Little Grow, the limestone on the left 

 bank becomes very tenacious and twisted -, the beds become 

 cavernous, are wavy, and large concentric masses are formed 

 resembling those at Prairie du Chien ; the whole mineral 

 substance appears to have had a tendency to resolve itself into 

 globular forms. The river is very beautiful about here : an 

 open stream, without islands, about 300 yards wide, flowing 

 between banks covered with handsome trees, vines, and 

 grass ; the soil is exceedingly rich, being composed of de 

 composed limestone, sand, and vegetable matter, black and 

 deep. A short distance beyond the village there is a bluff of 

 soft sandstone, in which the Indians say there is a cave, but 

 the rock from above has fallen down with hundreds of tons of 

 sandstone, and has concealed the entrance. Somewhat higher 

 up, and only a few miles from Fort Snelling, is another sand- 



