Ash

• Preboreal forest bed 
• Early Holocene wetlands in west-central IL

Samples from the Markman peat mine in Whiteside Co., IL, were collected for us by Prof. A.E. Bettis of the University of Iowa in 2004 (his original field designation was "IL-MP"). Collected specimens had less than 50 rings and were so badly decayed that they could not be crossdated. However, there could be more and better-preserved wood at that location. 

• Mid Holocene riparian forest

• Younger Dryas riparian forest

• No-analog vegetation from central Illinois

• Post-glacial wetlands of southern Lake Superior from 8200 to 6250 cal Yrs BP

• The Houghton Low Stage of the Lake Superior