Similarity in the properties of diamictons in a single till sheet
separated by over 150 km suggests that provenance and genetic processes were the same on both sides of Lake Michigan.
The till sheet
averages 3 m in thickness but can be up to 20 m thick in drumlins.
Ballantyne and Matthews (1983) documented polygonal fracture development on a newly exposed till sheet
in the periglacial environment in front of a retreating glacier where the mean annual temperature was -1 [degrees] to -2 [degrees] C (30-28 [degrees] F).
The Wisconsinan till sheet
of central and western Ohio south of the Powell and Union City moraines is considered relatively uniform in chemical and physical properties.
"It was costing us 40 hours of management time a week auditing it, counting it, banking it, doing all the cash sheets and till sheets
As many as eight or nine distinct till sheets
overlap in western Indiana.