Was eastern Iowa ever covered by glaciers?

Question

Was eastern Iowa ever covered by glaciers?

Answer 1

yes, all the way down to Crowley's ridge in Arkansas

Answer 2

Yes, most of it was, except for a small unglaciated area near the Mississippi River in NE Iowa, SW Wisconsin, SE Minnesota and NW Illinois.  This area is referred to as a "driftless area".  Read more about it here:

http://www.iadriftless.org/

http://www.lwcd.org/driftless_area.htm