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Anderson, A. C. (Alfred Conrad), 1887-, et al. / Soil survey of Manitowoc County, Wisconsin

Soils,   pp. 8-28 PDF (7.7 MB)

Page 26

dunes. The soil is not utilized for farming, but the larger areas sup-
port a fair growth of timber.
                       RODMAN GRAVELLY LOA-M
  The 2-inch surface layer of Rodman gravelly loam is grayish-
brown loam containing considerable gravel and grass roots and
some leaf mold. This is underlain by an 8-inch layer of reddish-
brown gravelly clay loam, beneath which is a 30-inch layer of grayish-
yellow loose sand and gravel. Most of the gravel is limestone but
some is crystalline. Many waterworn bowlders from 6 to 12 inches in
diameter occur, and some stones are on the surface and through the
soil. The soil material is calcareous,
  This is an inextensive and unimportant soil. It occurs chiefly in
the Kettle Range region, as kames and eskers, largely in Mishicott
and Liberty Towns but to a smaller extent in several other towns.
Areas are irregular, lumpy, and choppy, and natural drainage is
  This land is utilized chiefly for grazing, but as the pasture dries
up in summer and early fall it is of small value even for that pur-
pose. Some efforts are made at cultivation, but results are generally
  High-grade commercial gravel and sand occur under most of this
                   ORGANIC SOIS (MUCK AND M&T)
  The organic soils are composed dominantly of plant remains and
in this respect constitute a distinct class in comparison with soils
which are composed principally of mineral or inorganic matter. In
this region the organic soils occur in swamps and marshes. The
deposits have accumulated in permanently wet situations such as
swales and flat valley floors, on slopes permanently wet from seepage
water, and in certain kinds of lakes, some of which have been com-
pletely filled by plant remains. The organic deposits from which
these soils have been derived range in thickness from 1 foot to as
much as 40 feet. Organic soils differ in the nature of the mineral
substrata (whether marl, sand, or clay), in the average depth to the
water table, in the age and stage of decomposition of the plant mat-
ter, in the ash content, and in the quantity of mixed foreign mineral
material present. The organic soils comprise 12.4 per cent of the
total area of the county.
  Carlisle muck.-Carlisle muck is black or very dark-brown well-
disintegrated muck to an average depth of 36 or more inches. In
most places the surface layer, which is about 3 inches thick, is un-
decayed organic matter consisting of leaves, grass, and moss. Plant
roots give the material a slightly fibrous appearance to a depth of
6 inches. Most of the material is so finely divided and well disin-
tegrated that its source is not easily determined, but it appears to be
derived largely from wood, sedges, and reeds. At a depth of 18 or
more inches alternate layers of more brownish fine fibrous material
may be seen. Areas along streams may contain considerable mineral
matter which has been carried in and deposited as alluvium. The
larger areas away from streams contain very little mineral matter.
The muck averages about 5 feet in thickness but may extend 20 or
more feet. It is underlain mainly by mottled gray, blue, or pinkish-
red calcareous clay. The mucky layer is neutral or calcareous.

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