22 GEOLOGICAL STRUCTURE OF THE 



vent us in a great measure from arriving at any very 

 satisfactory results, while pursuing our enquiries in 

 this direction. Before entering upon this part of the 

 subject, it is necessary to make some remarks upon 

 the anomalies which present themselves towards the 

 western and north-western confines of the calcareous 

 platform. Thus, on arriving at the banks of the 

 Ousiconsin, instead of an almost imperceptible cur- 

 rent, as that of Fox river and its lakes, we are car- 

 ried along at the rate of three or four miles per hour, 

 and have almost uninterrupted hills on either bank 

 of the river ; still there is no very considerable dip, 

 but sufficient to bring into view a considerably lower 

 portion of the stratum, in which veins of galena or 

 lead-ore begins to make their appearance. Captain 

 Carver, and afterwards Mr. Dicksou, received from 

 the Indians a grant of these lead-mines, which Mr. 

 Dickson informed me, promised to be no less pro- 

 ductive than those they gave to Monsieur Dubuque, 

 situated on the western side of the Mississippi, and 

 about 40 miles below the entrance of the Ouis- 

 consin. The same calcareous lead-hills are met 

 with dividing the branches of the Meremek, about 

 thirty miles below St. Louis, and continue in a south- 

 west direction to the sources of the river St. Francis. 

 They are again met with on the banks of White 

 River, and galena has also been found near the 

 banks of Grand river of the Arkansa. The first oc- 

 currence of secondary calcareous rock on the banks 

 of the Arkansa, is towards the base of the areuelitk 



