LOCATION PERRINE FL
Established Series
Rev. SHM-MFV-AMS
12/2025
PERRINE SERIES
MLRA(s): 156A
Depth Class: Moderately deep
Drainage Class: Very poorly drained
Saturated Hydraulic Conductivity: Moderately high to high in the limnic material and negligible in the rock material
Parent Material: calcareous freshwater silty marl deposits over oolitic limestone bedrock
Slope: 0 to 1 percent
Elevation: 0 to 1 meter above mean sea level.
Mean Annual Air Temperature: 24 degrees C (75 degrees F)
Mean Annual Precipitation: 1345 millimeters (53 inches)
TAXONOMIC CLASS: Coarse-silty, carbonatic, isohyperthermic Typic Fluvaquents
TYPICAL PEDON: Perrine marly silt loam in freshwater swamp. (Colors are for moist soil unless otherwise stated.)
Lma1--0 to 28 centimeters (0 to 11 inches); grayish brown (10YR 5/2) marly silt loam, light gray (10YR 7/2), dry; moderate medium granular structure; very friable, soft, slightly sticky, nonplastic; many fine and few medium roots throughout; few fine tubular pores; 10 percent shell fragments; strong effervescence with 1N HC l; neutral (pH 7.2); abrupt smooth boundary. (8 to 30 centimeters thick)
Lma2--28 to 41 centimeters (11 to 16 inches); light brownish gray (10YR 6/2) marly silt loam; moderate medium angular blocky structure; very friable, soft, slightly sticky, nonplastic; many fine and few medium roots throughout; many fine tubular pores; 10 percent shell fragments; strong effervescence with 1N HCl ; slightly alkaline (pH 7.6); clear smooth boundary.
Lma3--41 to 66 centimeters (16 to 26 inches); light gray (10YR 7/2) marly silt loam; moderate medium angular blocky structure; very friable, soft, slightly sticky, nonplastic; many fine and few medium roots throughout; 10 percent shell fragments; strong effervescence with 1N HCl ; slightly alkaline (pH 7.7); abrupt smooth boundary. (Combined thickness of the Lma horizons is 50 to 100 centimeters)
2R--66 centimeters (26inches); weakly to strongly cemented oolitic limestone bedrock; solution holes up to 100 centimeters or more deep can be filled with sandy and/or loamy material.
TYPE LOCATION: Miami-Dade County, Florida; Arsenicker Keys, FL.
Latitude-- 25.4641667
Longitude-- -80.3730556
Datum--WGS84
RANGE IN CHARACTERISTICS:
Solum thickness: 50 to 100 centimeters (20 to 40 inches)
Depth of ochric epipedon: 8 to 30 centimeters (4 to 12 inches)
Depth to limestone bedrock: 50 to 100 centimeters (20 to 40 inches)
Reaction: slightly to moderately alkaline (pH 7.4 to 8.4) throughout
EC (mmhos/cm): 4 to 32 or more
Sodium Absorption Ratio: 5 to 15 percent or more
Exchangeable Sodium Percent: 0 to 13 percent or more
Calcium carbonate equivalence: 70 percent or more
Particle-size control section (weighted averages):
Clay content: 7 to 34 percent
Carbonate Clay content: 5 to 25 percent
Silt content: 70 to 95 percent
Oa horizon, where present:
Hue: 5YR, 7.5YR, 10YR, or Neutral
Value: 2 to 4
Chroma: 1 or 2
Texture: muck
von Post: H7 to H9
EC (mmhos/cm): 0 to 4
Exchangeable Sodium Percent: 0 to 5 percent
Sodium Absorption Ratio: 0 to 5 percent
Lmap horizon, where present:
Hue: 10YR or 2.5Y
Value: 3 to 6 moist, 3 to 8 dry
Chroma: 2 or less
Texture: marly silt loam, marly silty clay loam, or marly silt
Redoximorphic features: depletions or concentrations, 0 to 20 percent, and fine or medium in size
Lma horizon(s):
Hue: 10YR or 2.5Y
Value: 4 to 7 moist, 5 to 8 dry
Chroma: 1 to 4
Texture: marly silt loam, marly silt, or marly silty clay loam
Redoximorphic features: depletions or concentrations, 0 to 20 percent, and fine or medium in size
2Ckg horizon, where present:
Hue: 10YR
Value: 2 to 5
Chroma: 2 or less
Texture: fine sand, sand, loamy fine sand, or loamy sand
Reaction: neutral to moderately alkaline (pH 6.6 to 8.4)
EC (mmhos/cm): 0 to 4
Exchangeable Sodium Percent: 0 to 8 percent or more
Sodium Absorption Ratio: 0 to 4 percent
2R horizon: weakly to strongly cemented porous rippable oolitic limestone.
Solution holes several inches to several feet in width, and up to 1 meter in depth can occur. They are filled with sand, silt loam, or soft carbonatic material.
COMPETING SERIES: These are the
Lignumvitae and
Pennsuco series.
Lignumvitae soils: have limestone bedrock at similar soil depths of less than 100 centimeters but are subjected to flooding by tides, storm surges, and hurricanes, and occur in low broad tidal flats.
Pennsuco soils: have bedrock at depths greater than 100 centimeters and are on similar landform positions.
GEOGRAPHIC SETTING:
Parent material: calcareous freshwater silty marl deposits over oolithic limestone bedrock
Landscape: Lower Coastal Plain
Landform(s): freshwater marshes, swamps, and low broad coastal flats on marine terraces
Mean annual temperature: 23 to 27 degrees C (73 to 81 degrees F)
Mean annual precipitation: 940 to 1570 millimeters (37 to 62 inches)
Frost-free period: 365 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are
Dade and
Pennsuco soils.
Dade soils have a sandy particle-sized control section, have weakly expressed spodic horizons, have bedrock at depths less than 100 centimeters, are better drained, and occur on slightly higher landform positions.
Pennsuco soils have bedrock at depths greater than 102 centimeters (40 inches) and are on similar landform positions.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: very poorly drained
Saturated hydraulic conductivity (KSAT): moderately high to high
Runoff: moderately high to high
Depth to seasonal high-water table: 0 to 15 centimeters (0 to 6 inches)
Ponding frequency and duration: in natural areas, frequent with duration of very long, depth of 0 to 61 centimeters (0 to 24 inches)
Hydric Indicators: F10 Marl
USE AND VEGETATION:
Major uses: wildlife habitat, water quality, inland areas have been drained for truck crops and ornamental nursey stock.
Dominant vegetation: in undrained areas consists of sawgrass, reeds, sedges, grasses, and scattered cabbage palm.
DISTRIBUTION AND EXTENT:
General area: Florida Everglades and associated areas
Land Resource Region: U - Florida Subtropical Fruit, Truck Crop, and Range Region
Major Land Resource Area: 156A
Extent: moderate
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Auburn, Alabama
SERIES ESTABLISHED: Everglades Project Area, Florida, 1945.
REMARKS: Diagnostic horizons and features in this pedon:
Particle-size control section: 25 to 100 centimeters
Limnic soil material: 0 to 66 centimeters (Lmap and Lma horizons)
Lithic contact: 66 centimeters (2R horizon)
Aquic conditions: Endosaturation - 0 to 66 centimeters (0 to 26 inches)
Calcium carbonate equivalence: greater than 70 percent throughout
ADDITIONAL DATA:
Laboratory data is available on the National Soil Survey website at: http://ncsslabdatamart.sc.egov.usda.gov/querypage.aspx
OSD User Site ID: S1985FL025004
OSD User Pedon ID: S1985FL025004
National Cooperative Soil Survey
U.S.A.