CLINTON IRON ORE DEPOSIT. 



333 



the wells of the place, with such observations as were possible, can be 

 trusted, much more uneven. The bed underlies the southeastern por- 

 tion of the village. In the southwestern portion, the denuding agen- 

 cies have swept away the overlying limestone and the ore, if it ever 

 existed there, and have substituted adrift deposit. On the north side 

 of the Rubicon, the horizon of the ore has been depressed by an ap- 

 parent fault, so as to occur at a considerable depth below the surface 

 of the river. There seerns good evidence that the deposit reaches ten 

 or twelve feet in thickness at some points, but rapidly thins out, so 

 that the average thickness for the area over which it occurs probably 

 does not exceed two feet. The accompanying section will show the 

 general nature of the deposit and its relations. 



FIG. 42. 



Jf.X. 



POSITION AND RELATIONS OP THE IRON ORE AT HARTFOKD. 

 N- L. Niagara Limestone. C. 8. Cincinnati Shale. 



Besides the deposits at Iron Ridge and Hartford, and their vicinity, 

 drift ore, of precisely similar nature, occurs in the town of Stockbridge. 

 The deposit is small and lies upon the west side of a ridge of moder- 

 ate height, the exterior of which, at least, is drift. A well in the 

 vicinity is said to have reached iron ore, eighteen inches in thickness, 

 beneath limestone. 



At the Cascade Falls, east of De Pere, the formation again appears. 

 Its situation beneath the Niagara limestone and above the Cincinnati 

 shales is shown in the accompanying figure. The fall 

 is caused by the fact that the iron ore is more easily 

 worn away by the action of the stream than the lime- 

 stone above. The shale is somewhat more resisting 

 than the ore. The maximum thickness of the ore is 

 five feet. On the east side of the gorge, its base was 

 c concealed at the time of examination, and it was only 

 at the fall, and to the west of it, that fnll measurements 

 _ a could be made. Just east of the fall, the thickness, 

 measured as accurately as the nature of the case 

 ADE FALLS, NEAR would admit, is four feet, eight and one-half inches. 

 Just west of the fall it is four feet nine inches. A 



a. Cincinnati shale. Viii it. \ 1 n j? ^i 



b. Clinton iron ore. httle farther on where the wall of the gorge curves 



c. Niagara limestone, toward the north, it reaches its maximum of five feet. 



FIG. 43. 



