Ackmore to Zwingle Home Series Names Shallow to pre-Wisconsinan Till
- pre-Illinoian till occurs within 150 cm of the surface under
a surface mantle of hillslope or erosion surface sediments
- soils of these series form in pre-Wisconsinan hillslope and alluvial
sediments on uplands.
- NRCS Map Units for these series are on uplands and upland drainageways