HOUSTON COUNTY, 1884. N. H. WINCHELL. 



are the Jordan sandstone and the Shakopee limestone. These occur under the loam 

 of the upland, but rarely appear in the main bluffs. Below the Lower Magnesian 

 limestone is sandstone (St. Croix). In the midst of this are a great-amount of shale 

 and a small amount of limestone. The last, which has been quarried at Hokah, is 

 the St. Lawrence limestone proper. This sandstone and shale continue to the river 



level - N. H. W. 



