THE ILLINOIAN ICE INVASION 



319 



County 



Township 



Depth 



Character 



Marquette 



Westfield 



230 



Carbonaceous matter 





Montello 



20 



Logs 



Green Lake 



Brooklyn 



100 



Leaves 



Sauk 



Delton 



260-270 



Twigs 





Delton 



292 



Muck 





Greenfield 



190 



Muck 



Dane 



Middleton 



100 



Peat 





Middleton 



92 



Wood 





Middleton 



80 



Black material 





Madison 



240 



Wood 





Fitchburg 



112 



Peat 





Fitchburg 



135 



Muck and driftwood 





Dunkirk 



200 



Wood 



Rock 



Harmony 



40 



Blackish clay 





Harmony 



125 



Muck 





Johnston 



40 



Muck 



Walwoth 



Richmond 



230 



Black soil 



Jefferson 



Farmington 



60 



Wood 



Waukesha 



Summit 



60 



Muck 



Washington 



Hartford 



30 



Muck 





Addison 



30 



Soil, tamarack tree 



Fond du Lac 



Fond du Lac 



30-50 



Black dirt, wood 





Eden 



90 



Muck 



Walworth 



Lafayette 



180 



Muck 





Bloomfield 



98-141 



Wood 





East Troy 



60 



"Iron ore" 



Kenosha 



Salem 



50-60 



Gas 



Milwaukee 



Greenfield 



26 



Black sand 





Franklin 



24 



Black loam 





Oak Creek 



114 



"Dry turf" 



Waukesha 



Lisbon 



50 



Black soil 



Washington 



Polk 



180 



Muck or peat 



Washington 



Jackson 



250 



Black peat 



Sheboygan 



Holland 



60 



Muck 





Holland 



100 



Black muck and leaves 





Holland 



62 



Black muck 



Weidman 163 finds evidences of five drift sheets in Wisconsin — the pre- 

 Kansan, Kansan, Iowan, Early and Late Wisconsin. An interglacial interval 

 is noted between the second and third drifts, i.e. the Sangamon. The loess is 

 considered later than the third (Iowan) and older than the fourth (post-Iowan 

 or Peorian). Much interesting and valuable information awaits the student 



m Science, N. S., XXXVTI, p. 456. 



