The Soils of The Regional Municipality of Ottawa=Carleton

with wetland vegetation . The organic soils of these units were
not characterized and may vary widely in material composition,
depth, and degree of decomposition . Sedges, reeds, leaf
and needle fragments, grasses, woody fragments and stumps
may all constitutemarshland organic materials .
Marshland units primarily occur in low lying depressional
areas and may overlay various types of mineral materials
which were not differentiated . Occasionally thin layers ofmineral
material underlain by bedrock may occur.
Standing water at the surface and very poor drainage conditions
are due to both precipitation and groundwater discharge
from adjacent areas, and the lack of adequate natural
drainageoutletsto remove such additions .
Vegetation found in marshland areas varies, but most
oftenconsists ofrushes, reeds, grasses or sedges which occur in
combination with lesser amounts of birch, alders, or maples .
The latter woody species usually can be found in perimeter
areas which border better drained mineral soils . Some recent
marshland areas, which once had fluctuating water tables,
may have a significant number of dead or dying tree species
occurring within them .
Land Altered by Man - Disturbed Land (DL), Landfill Site
(LF), Sewage Lagoon (SL), Topsoil
Removed (TR), Urban Land (U) .
Land areas which were altered by man and, therefore, did
not occur naturally in the landscape were delineated and
shown separatelyon the soil maps . Thetypes of land occurring
in these areas can be inferred from the designation given in
each delineation . Undisturbed soils may occur within each
type of unit which could not be shown separately at the map
scale.