Geophysical Analysis of Wisconsin Episode Deposits in the Savanna Terrace Near Savanna, IL

Abstract

The Savanna Terrace can be traced for approximately 1,000 km along the Mississippi River from Pepin County, Wisconsin to Jackson County, Illinois. Deposition of the terrace began during Wisconsin Episode deglaciation of the Laurentide Ice Sheet (LIS). The units essential to this project consist of slackwater materials of clay-sized particles from the Equality Formation above glaciofluvial sands of the Henry Formation.