LOESS IN THE IVISCONSIN DRIFT FORMATION 937 



the earlier epochs, though which one, it is, in the light of pres- 

 ent knowledge, impossible to say. 



Whether loess or anything genetically equivalent to it 

 extends over the elevations which rise above the dissected plain 

 has not yet been determined. The remnants of this earlier and 

 higher plain, so far as visited, were limited in extent, and any 

 loam which might once have covered them would be likely to 

 have disappeared. It is to be borne in mind, however, that 

 these elevations are lower than the Baraboo quartzite ranges, 

 over which clay loam has been deposited in recent time. 



There can be little doubt that loam, sometimes clayey 

 (especially over limestone), and sometimes sandy (especially 

 over sandstone), but in all probability genetically connected 

 with the loess, is widespread in the driftless area. 



RoLLiN D. Salisbury. 



