|
LABEL |
NAME |
DESCRIPTIONS FOR STANDARD LANDFORM AND MISCELLANEOUS SURFACE
FEATURES |
|
BLO |
Blowout |
A small saucer, cup, or through-shaped
hollow or depression formed by wind erosion, on a pre-existing sand deposit. Typically
___ to ___ acres. |
|
BPI |
Burrow pit |
An open excavation from which soil and
underlying material have been removed, usually for construction purposes.
Typically ___ to ___ acres. |
|
CLA |
Clay spot |
A spot where the surface texture is silty clay
or clay in areas where the surface layer is sandy loam, loam, silt loam, or
coarser. Typically ___ to ___ acres. |
|
DEP |
Depression, closed |
A shallow, saucer-shaped area that is slightly
lower on the landscape than the surrounding area and is without a natural
outlet for surface drainage. Typically ___ to ___ acres. |
|
ESB |
Escarpment, bedrock |
A relatively continuous and steep slope or
cliff, which was produced by erosion or faulting, that breaks the general
continuity of more gently sloping land surfaces. Exposed material is hard or
soft bedrock. |
|
ESO |
Escarpment, nonbedrock |
A relatively continuous and steep slope or cliff,
which generally is produced by erosion but can be produced by faulting, that
breaks the continuity of more gently sloping land surfaces. Exposed earthy
material is nonsoil or very shallow soil. |
|
GPI |
Gravel pit |
An open excavation from which soil and
underlying material have been removed and used, without crushing, as a source
of sand or gravel. Typically ___ to ___ acres. |
|
GRA |
Gravelly spot |
A spot where the surface layer has more than
35 percent, by volume, rock fragments that are mostly less than 3 inches in
diameter in an area with less than 15 percent fragments. Typically ___ to ___
acres. |
|
GUL |
Gully |
A small channel with steep sides cut by
running water through which water ordinarily runs only after a rain, or after
ice or snow melts. It generally is an obstacle to wheeled vehicles and is too
deep to be obliterated by ordinary tillage. |
|
LDF |
Landfill |
An area of accumulated waste products of
human habitation that can be above or below natural ground level. Typically
___ to ___ acres. |
|
LAV |
Lava flow |
A solidified body of rock formed through
lateral, surface outpouring of molten lava from a vent or fissure. Often lobate in shape. Typically ___ to ___ acres. |
|
LVS |
Levee |
An embankment that confines or controls
water, especially one built along the banks of a river to prevent overflow of
lowlands. |
|
MAR |
Marsh or swamp |
A water saturated, very
poorly drained area, intermittently or permanently covered by water. Sedges, cattails,
and rushes dominate marsh areas. Trees or shrubs dominate swamps. Not used in
map units where the named components are poorly or very poorly drained.
Typically ___ to ___ acres. |
|
MPI |
Mine or quarry |
An open excavation
from which soil and underlying material are removed and bedrock
is exposed. Also denotes surface openings to underground mines. Typically ___
to ___ acres. |
|
MIS |
Miscellaneous water |
Small, constructed water area that is used
for industrial, sanitary, or mining applications and
contains water most of the year. Typically ___ to ___ acres. |
|
WAT |
Perennial water |
Small, natural or constructed lake, pond, or
pit that contains water most of the year. Typically ___ to ___ acres. |
|
ROC |
Rock outcrop |
An exposure of bedrock at the surface of the
earth. Not used where the named soils of the surrounding map unit are shallow
over bedrock, or where "Rock outcrop" is a named component of the
map unit. Typically ___ to ___ acres. |
|
SAL |
Saline spot |
An area where the surface layer has an
electrical conductivity of 8 mmhos cm -1 more than
the surface layer of the named soils in the surrounding map unit, which has
an EC of 2 mmhos cm -1 or less. Typically ___ to
___ acres. |
|
SAN |
|
A spot where the surface layer is a
loamy fine sand or coarser in areas where the surface layer of the named
soils in the surrounding map unit is very fine sandy loam or finer. Typically
___ to ___ acres. |
|
ERO |
Severely eroded spot |
An area where on the average 75 percent or
more of the original surface layer has been lost because of accelerated
erosion. Not used in map units that are named
severely eroded, very severely eroded, or gullied. Typically ___ to ___
acres. |
|
SLP |
Short, steep slope |
Narrow soil area that has slopes that are at
least two slope classes steeper than the slope class of the surrounding map
unit. |
|
SNK |
Sinkhole |
A closed depression formed either by
solution of the surficial rock or by collapse of
underlying caves. Typically ___ to ___ acres. |
|
SLI |
Slide or slip |
A prominent landform scar or ridge caused by
fairly recent mass movement or descent of earthy material resulting from
failure of earth or rock under shear stress along one or several faces. Typically
___ to ___ acres. |
|
SOD |
Sodic spot |
An area where the surface layer has a sodium
absorption ratio that is at least 10 more than the surface layer of the named
soils in the surrounding map unit which have sodium absorption ratio of 5 or
less. Typically ___ to ___ acres. |
|
SPO |
Spoil area |
A pile of earthy materials, either smoothed or uneven, resulting from human activity.
Typically ___ to ___ acres. |
|
STN |
Stony spot |
A spot where 0.01 to 0.1 percent of the surface
cover is rock fragments that are greater than 10 inches in diameter in areas
where the surrounding soil has no surface stones. Typically ___ to ___ acres. |
|
STV |
Very stony spot |
A spot where 0.1 to 3 percent of the surface cover is rock fragments that are greater than 10
inches in diameter where the surrounding soil has less than 0.1 percent of
the surface cover of stones. Typically ___ to ___ acres. |
|
WET |
Wet spot |
A somewhat poorly drained to very poorly drained
area that is at least two drainage classes wetter than the named soils in the
surrounding map unit. Typically ___ to ___ acres. |
|
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DESCRIPTION FOR AD HOC FEATURES |
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