Ackmore to Zwingle Home Series Names Mucks/Peats (cf. Woden Member): Sediments filling semi-closed and closed depressions(late Wisconsinan through Holocene in Age)
- Alternating zones of fine-grained colluvium, peat, and muck.
- Organic sediments (peat and muck) are common, capping depositional units.
- Can be buried by lighter-colored Camp Creek colluvium
- Mineral sediment is usually a reduced light gray color at base, grading
upward to black, organic-coated sediment
- Base dates from 14,000 RCYBP in central Iowa to 12,000 RCYBP in
northern Iowa
- NRCS Map Units for these series are in concave depressions on glacial lake and
till plains, upland drainageways, floodplains