LOCATION TAMIAMI                 FL

Established Series
Rev. CN-MFV-AMS
12/2025

TAMIAMI SERIES

MLRA(s): 156A
Soil Survey Regional Office (SSRO) Responsible: Auburn, Alabama
Depth Class: Moderately deep
Drainage Class: Very poorly drained
Saturated Hydraulic Conductivity: High to very high in the Oa horizons, moderately high in the limnic material
Parent Material: Organic materials stratified with freshwater silty marl deposits over oolitic limestone bedrock
Slope: 0 to 1 percent
Elevation: 1 to7 meters above mean sea level.
Mean Annual Air Temperature: 24 degrees C (75 degrees F)
Mean Annual Precipitation: 1345 centimeters (53 inches)

TAXONOMIC CLASS: Euic, isohyperthermic Lithic Haplosaprists

TYPICAL PEDON: Tamiami muck, on a rise in a freshwater marsh. (Colors are for moist soil unless otherwise stated.)

Oa--0 to 10 centimeters (0 to 4 inches); black (10YR 2/1) muck, dark gray (10YR 4/1), dry; 30 percent unrubbed fiber, 5 percent rubbed fiber; von post humification scale H8; moderately medium subangular blocky structure; many very fine and fine roots throughout; sodium pyrophosphate extract is dark brown (10YR 3/3); slightly alkaline (pH 7.8); abrupt smooth boundary. [5 to 61 centimeters (3 to 24 inches) thick]

Lma--10 to 30 centimeters (4 to 12 inches); gray (10YR 6/1) marly silt loam; moderate medium subangular blocky structure; very friable, soft; slightly sticky, nonplastic; many very fine and fine roots throughout; common fine pores throughout; 10 percent shell fragments; strongly effervescent with 1N HCl; slightly alkaline (pH 7.8); abrupt smooth boundary. [10 to 28 centimeters (4 to 11 inches) thick]

O'a--30 to 79 centimeters (12 to 31 inches); very dark gray (5YR 3/1) muck; 30 percent unrubbed fiber, 5 percent rubbed fiber; von post humification scale H8; moderately medium subangular blocky structure; few fine roots throughout; sodium pyrophosphate extract is yellowish brown (10YR 5/4); slightly alkaline (pH 7.6); abrupt irregular boundary. [28 to 100centimeters (11 to 39 inches) thick]

2R--79 centimeters (31 inches); weakly to strongly cemented oolitic limestone bedrock; solution holes up to 100 centimeters (40 inches) or deeper can be filled with sandy and/or loamy material.

TYPE LOCATION: Miami-Dade County, Florida; USGS quadrangle Hialeah, FL.
Latitude: 25.7529361
Longitude: -80.4824611
Datum: WGS84
Estimated from other source

RANGE IN CHARACTERISTICS:
Solum thickness: 50 to 100 centimeters (20 to 40 inches)
Depth to seasonally high-water table: 0 to 15 centimeters (0 to 6 inches)
Soil Reaction: Moderately acid to moderately alkaline (pH 5.6 to 8.4)
Depth to stratification: 5 to 76 centimeters (2 to 30 inches)
Depth to bedrock: 50 to 100 centimeters (20 to 40 inches)
One or more Lma horizon may occur, but the combined thickness is less than 1/3 the control section.
Fiber content: Unrubbed: 10 to 70 percent; rubbed: less than 17 percent

Particle-size control section of the Lma horizon (weighted averages):
Clay content: 5 to 20 percent
Silt content: 60 to 90 percent

Oa horizon:
Hue: 5YR to 2.5Y or Neutral
Value: 2 to 4
Chroma: 3 or less
Texture: muck
Von Post: H7 to H9
EC (mmhos/cm): 0 to 4
Exchangeable Sodium: 0 to 4 percent
Sodium Absorption Ratio: 0 to 4 percent
Sodium pyrophosphate extract color: Hue: 10YR, Value: 2 to 7, Chroma: 2 to 8
A thin paraphyton or marl layer may overlie the Oa horizon in some pedons.

Lma horizon(s):
Hue: 10YR to 5Y
Value: 4 to 8
Chroma: 2 or less
Texture: marly silt loam, marly silt, or marly loam
Calcium carbonate equivalence: 40 to 80 percent or more
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
Shell fragments: 0 to 25 percent

O'a horizon(s):
Hue: 5YR to 2.5Y or Neutral
Value: 2 to 4
Chroma: 3 or less
Texture: muck
Von Post: H7 to H9
EC (mmhos/cm): 0 to 4
Exchangeable Sodiuum: 0 to 4 percent
Sodium Absorption Ratio: 0 to 4 percent
Sodium pyrophosphate extract color: Hue: 10YR, Value: 2 to 7, Chroma: 2 to 8

2R horizon: weakly to strongly cemented oolitic limestone bedrock, with solution holes filled with sandy and/or marly materials. Solution holes can be up to 100 centimeters (40 inches) or deeper.

COMPETING SERIES: These are Cooper Town, Gator Lake, Macks Camp, and Shark Valley soils.
Cooper Town soils: lack stratification of marly materials and are shallow to limestone bedrock
Gator Lake soils: lack stratification of marly materials and are very shallow to limestone bedrock
Macks Camp soils: have bedrock at depths of 100 to 150 centimeters, lack stratification of marly materials within the control section, and occur in similar landform positions
Shark Valley soils: have bedrock at similar depths of 50 to 100 centimeters, occur on similar landform positions, but lack stratification of marly materials within the control section

GEOGRAPHIC SETTING:
Landscape: Lower Coastal Plain
Landform(s): Talfs, rises, and/or dips on freshwater marshes, swamps, or low broad flats
Parent material: well decomposed organic materials stratified with silty marl deposits over oolitic limestone bedrock
Mean annual air temperature: 23 to 27 degrees C (73 to 81 degrees F)
Mean annual precipitation: 940 to 1570millimeters (37 to 62 inches)
Frost free duration: 365 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Buffalo Tiger, Loxahatche, and Plantation soils.
Buffalo Tiger soils have limestone bedrock at depths greater than 150 centimeters (60 inches), lack stratification of marly deposits and occur in similar landform positions.
Loxahatche soils are very deep, lack limestone bedrock within 200 centimeters (80 inches) and are in similar landform positions.
Plantation soils have sandy layers below organic materials that are 25 to 40 centimeters thick above the limestone bedrock.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Very poorly drained
Saturated hydraulic conductivity (Ksat): high to very high in the Oa horizons, moderately high in the limnic materials
Surface runoff: negligible
Depth to seasonal high water table: Under natural conditions the water table is within 15 centimeters (6 inches) of the surface for 9 to 11 months during most years, except during extended dry periods; currently the water table is controlled by anthropogenic activities.
Ponding frequency and duration: Frequent for very long durations
Hydric Indicators: A1 Histosol, A8 Muck Presence, and F10 Marl

USE AND VEGETATION:
Major uses: wildlife habitat, water quality, water storage, and recreation.
Dominant vegetation: sawgrass on rises and talfs, sedges and other water tolerant plants in dips, and willow and Melaleuca are common tree species near built up areas.

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: Miami-Dade County, Florida; 1990.

REMARKS: Diagnostic horizons and features recognized in this pedon include:
Particle-size control section: 25 to 79 centimeters

Stratified control section - 10 to 79 centimeters (4 to 31 inches) - Lma and O'a horizons)
Lithic contact - 79 centimeters (31 inches) (2R horizon)
Peraquic conditions: Endosaturation - 0 to 79 centimeters (0 to 31 inches)

This soil was mapped as Everglades peat, shallow phase over shallow marl and Loxahatchee peat, shallow phase over shallow marl in the 1947 soil survey of Dade County.

ADDITIONAL DATA:
OSD User Site ID: 1987FL686003

OSD User Pedon ID: 1987FL686003

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National Cooperative Soil Survey
U.S.A.