313 LIFE OF THE PLEISTOCENE 



amples of the strata in which the forest is found. Some of these are noted be- 

 low: 



Town of Center Seven miles north of Appleton 



Red clay 15 feet Clay 7 feet 



Sand 80 " Sand 15 " 



Blue clay 25 " Red clay 40 " 



Wood, leaves, stumps 2 " Gravel 12 



Gravel x " Red clay 6 " 



Trees, leaves, stumps 2 " 



Depth of well 122 " Gravel 10 " 



Rock x 



Depth of well 92 " 



Whittlesey 160 many years ago referred to the same deposit when he des- 

 cribed the buried forest of Green Bay at 24 and 50 feet below the surface. 

 Some wood examined was determined as cedar. 



A number of instances are on record of the occurrence of wood and old 

 soils beneath Wisconsin till in southern Wisconsin. Both Winchell 161 and 

 Newberry 162 have reported wood "resembling white cedar" from a well 18 

 feet deep in Walworth County. Winchell reports a "tamarack" log from a 

 depth of 25 feet, with clay above and gravel below, the locality being five miles 

 east of Geneva. At Appleton, Outagamie County, red cedar is reported 

 from 30 feet, also in red clay. In Brown County, wood, apparently willow, 

 was found in red clay, 50 feet below the surface. 



The variation in the depth below the surface of these deposits indicates 

 either a great variation in the thickness of the Wisconsin till, or that several 

 horizons are represented. It may also be true that the Wisconsin till contains 

 many sticks and logs at various depths which were picked up by the ice sheet 

 from the Sangamon or Peorian surface and incorporated with the Wisconsin 

 till. 



Alden 162a lists a number of records of vegetal remains from deposits thot to 

 lie between the Illinoian and Wisconsin tills, in southeastern Wisconsin. The 

 variation in depth indicates probably that several drift sheets have been pene- 

 trated. The shallower depths evidently record the stage preceding the re- 

 advance of the Lake Michigan glacier. For convenience these records are 

 tabulated below: 



110 Foster and Whitney's report, p. 394. 



"» Proc. Amer. Assoc. Ad. Sci., XXIV, pp. 54-55. 



182 Geol. Ohio, II, p. 31. 



tea p ro fe SS i nal paper 106, U. S. G. S., pp. 177-179. 





