|This subaqueous soil is on lake beds
and shorelines of freshwater lakes, ponds, and reservoirs. Shannock
soils are formed in recent lacustrine sediments over glacial lacustrine
or glacial fluvial material. Mapped areas are irregular in shape and
range from 1 to 140 hectares (2 to 350 acres). Slope ranges from 0 to 3
Typically, this soil has a black or dark gray sand or sandy
loam surface layer, 20 to 80 cm thick. The substratum is very dark gray,
gray, or grayish brown silt loam, sandy loam, loamy sand, or sandy
This soil is permanently submerged with up to 3 meters of fresh
water. All horizons have a pH of less than 6.0. Phosphorus concentration
in the upper 10 cm ranges from 39.2 to 309.4 ppm with a mean of 180.8
ppm. Carbon pools in the upper meter of Shannock soils range from 57 to
352 Mg C ha-¹with a mean of 206 Mg C ha-¹.
Included with this soil in mapping are small areas of Aquapaug and
Burlingame soils in areas with less organic matter in the surface
layers. Small areas of Wickford and Tuckertown soils may also be
included in areas where organic layers overlie glacial parent materials
below. Included areas make up about 15 percent of this map unit.
Fishing and recreational boating are common in the areas within this
map unit. Most areas are vegetated with native and invasive submerged
aquatic vegetation including white pond lily, yellow pond lily,
bladderwort, floating hearts, variable pondweed, and variable milfoil.
Right: Profile of a Shannock Soil
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