Loamy Plains and Hills, Eastern Part. The Munising soil
series is shown in Fig. 5.8a.
The sixth segment along Lake Superior is in MLRA 92,
the Lake Superior Lake Plain, and extends from Marquette
around the Keweenaw Peninsula to Superior, Wisconsin.
This segment is composed largely of wave-washed clayey
and sandy loam till and sandy dune and beach deposits.
Clay-rich till and lacustrine deposits contain Glossudalfs
(Big Iron, Flintsteel, and Miskoaki soil series), Glossaqualfs
(Cuttre), and Fragiorthods (Munising, and Yalmer soil series). The Yalmer soil series is a bisequal soil derived from
outwash over till (Fig. 6.4). The upper sequum contains a
black A horizon (cut off from top of photo), a reddish ray E
horizon to 12 in. (30 cm), a dark reddish brown Bhs horizon
to 24 in. (60 cm), and yellowish red Bs horizons to 30 in.
(76 cm). The lower sequum contains a fragipan and glossic
horizon (2(E/B)x and 2(B/Ex) with a mixture of reddish gray
and dark reddish brown colors that is underlain by a reddish
brown argillic horizon (2Bt).
Areas of wave-washed sandy till in Segment 6 contain
Haplorthods (Keweenaw soil series) and Fragiorthods
(Gogebic soil series) (Fig. 6.5). Sandy sediments feature
Haplorthods (Kello, Rubicon, Kalkaska, and Croswell soil
series), Udipsamments (Deer Park) and Psammaquents
Fig. 6.3 Parent materials, landforms, and soil series in segment 5 of Lake Superior (MLRA 93B). The soils are on a wave-washed sandstone
bench from the Nipissing period. Source Soil survey of Marquette County, Michigan (Schwenner 2007)
94
6 Soils of the Lake Superior Coastal Zone