A recent geological discovery helps UW-Madison geologists refine the story of Wisconsin�s last ice age.
ââ?¬Å?Up until now, there have been no dates on when the last glaciation began in Wisconsin,ââ?¬Â said Dave Mickelson, UW-Madison professor emeritus of the department of geology and geophysics. Mickelson was one of three geologists who discovered and dated glacial lake sediments buried on UW-Madisonââ?¬â?¢s campus.