LOCATION TARPANS                 FL

Established Series
Rev. CAP-MVF-AMS
11/2023

TARPANS SERIES

MLRA(s): 156A
Soil Survey Regional Office (SSRO) Responsible: Auburn, Alabama
Depth Class: Moderately deep
Drainage Class: Very poorly drained
Saturated Hydraulic Conductivity: Moderately high to high in A horizons and moderately slow in the Btg horizon
Index Surface Runoff: Negligible
Parent Material: Sandy and loamy marine sediments over a limestone
Slope: 0 to 2 percent
Elevation: 0 to 20 feet above mean sea level.
Mean Annual Air Temperature: 25 degrees C (77 degrees F.)
Mean Annual Precipitation: 1397 centimeters (55 inches)

TAXONOMIC CLASS: Fine-loamy, siliceous, superactive, isohyperthermic Typic Argiaquolls

TYPICAL PEDON: Tarpans fine sand is on a low broad flat in forested low density urban land. (Colors are for moist soil unless otherwise stated.)

A1--0 to 15 centimeters (0 to 6 inches); black (10YR 2/1) fine sand, dark gray (10YR 4/1), dry; weak fine granular structure; friable, soft; nonsticky, nonplastic; many fine and common medium roots throughout; slightly acid (pH 6.3); clear smooth boundary.

A2--15 to 36 centimeters (6 to 14 inches); very dark grayish brown (10YR 3/2) fine sand, grayish brown (10YR 5/2), dry; weak fine granular structure; friable, soft; nonsticky, nonplastic; common fine and medium roots throughout; slightly acid (pH 6.3); gradual wavy boundary. [Combined thickness of the A horizons ranges from 25 to 50 centimeters (10 to 20 inches)]

Eg--36 to 46 centimeters (14 to 18 inches); dark gray (10YR 4/1) fine sand; single grain; loose; nonsticky, nonplastic; common fine and medium roots throughout; slightly acid (pH 6.3); clear wavy boundary. [5 to 15 centimeters (2 to 6 inches thick)]

Btg--46 to 61 centimeters (18 to 24 inches); light gray (10YR 7/1) sandy clay loam; weak fine subangular blocky structure; friable; few fine roots; sand grains are coated and bridged with clay; few faint discontinuous clay flows in pores; few fine and medium distinct yellow (10YR 7/8) streaks and masses of iron accumulation; slightly alkaline; clear irregular boundary. [10 to 50 centimeters (4 to 20 inches thick)]

2Ck--61 to 76 centimeters (24 to 30 inches); light gray (10YR 7/2) marly silt loam; weak fine granular structure; friable, soft; nonsticky, nonplastic; about 75 percent of sand grains coated with carbonates; strongly effervescent; moderately alkaline (pH 8.4); clear irregular boundary. [15 to 20 centimeters (6 to 8 inches thick)]

3R--76 centimeters (30 inches); moderately cemented to indurated limestone bedrock, solution holes up to 102 centimeters (40 inches) or more deep can be filled with sandy and/or loamy material.

TYPE LOCATION: Collier County, Florida; about 1.4 miles south of Randall Blvd and 0.4 miles east of 16th Street NE; about 2,180 feet west and 1,390 feet south of the northeast corner of Sec. 35, T. 46 S., R. 28 E.; Latitude 26 degrees, 15 minutes, 29.96 seconds N, Longitude 81 degrees, 34 minutes, 4.00 seconds W; WGS84; USGS Corkscrew SE, FL quadrangle.

RANGE IN CHARACTERISTICS:
Solum thickness range: 51 to 102 centimeters (20 to 40 inches)
Aquic conditions: 0 to 15 centimeters (0 to 6 inches)
Depth to lithic contact: 51 to 102 centimeters (20 to 40 inches) solution holes in the limestone are common and can extend to 102 centimeters (40 inches) or more in some areas, soil material ranges from sandy to loamy.
Depth to redoximorphic features: 25 to 51 centimeters (10 to 20 inches)
Depth to endosaturation: 0 to 102 centimeters (0 to 40 inches)
Reaction: Slightly acid to moderately alkaline (pH 7.3 to 8.4)
Calcium carbonates: finely disseminated or as soft masses
Rock fragments: 0 to 35 percent, dominantly in the Btg horizon or below
EC (mmhos/cm): 0 to 2
Exchangeable Sodiuum: 0 to 4 percent
Sodium Absorption Ratio: 0 to 4 percent

Typically, the solum is 50 to 100 centimeters (20 to 40 inches) thick, but. Depth to hard limestone bedrock ranges from 50 to 100 centimeters (20 to 40 inches). Clay content ranges from 18 to 25 percent. Silt content is less than 15 percent. Soil reaction ranges from slightly acid to moderately alkaline throughout.

A or Ap horizon:
Hue: 10YR or 2.5Y
Value: 2 or 3
Chroma: 1 or 2
Texture: Fine sandy loam, sandy loam, loamy fine sand, loamy sand, fine sand, or sand
Reaction: Slightly acid to neutral (pH 6.1 to 7.3)
Clay content: 0 to 7 percent

E or Eg horizon:
Hue: 10YR, 2.5Y, or Neutral
Value: 4 or 5
Chroma: 1 or 2
Texture: fine sand, sand, loamy fine sand, or loamy sand
Reaction: Slightly acid to neutral (pH 6.1 to 7.3)
Redoximorphic features: depletions and/or concentration, 1 to 20 percent, and fine or medium in size
Clay content: 0 to 3 percent

Btg or Btkg horizons:
Hue: 10YR, 2.5Y, 5Y, or Neutral
Value: 4 to 7
Chroma: 1 or 2
Texture: fine sandy loam, sandy loam, or sandy clay loam, with pockets or lenses of sand or loamy sand
Reaction: slightly alkaline to moderately alkaline (pH 7.4 to 8.4)
Redoximorphic features: depletions and/or concentration, 1 to 20 percent, and fine or medium in size
Clay content: 15 to 35 percent

2Ck or 2Ckg horizons:
Hue: 10YR, 2.5Y, 5Y or Neutral
Value: 5 to 8
Chroma: 1 or 2
Texture: marly silt loam or marly loam
Rock fragments: 0 to 35 percent
Reaction: moderately alkaline (pH 7.9 to 8.4)
Clay content: 10 to 30 percent

3R horizons: moderately cemented to indurated limestone bedrock with solution holes. The solution holes contain sandy to loamy mineral soil.

COMPETING SERIES: There are no competing series. Closely related soil includes the Chobee (FL) series and Copeland (FL) series. Chobee soils is Hyperthermic, lack bedrock within depths of 203 centimeters (80 inches) and are on similar landform positions. Copeland soils is Hyperthermic and are moderately deep to limestone bedrock.

GEOGRAPHIC SETTING:
Parent material: Sandy and loamy marine sediments over limestone bedrock
Landscape: Lower Coastal Plain
Landform(s): low broad flats, drainageways, and depressions
Mean annual temperature: 22 to 25 degrees C. (72 to 77 degrees F.)
Mean annual precipitation: 1270 to 1524 millimeters (50 to 60 inches)
Frost-free period: 360 to 365 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Boca soils have bedrock at depths greater than 50 centimeters (20 inches), have argillic horizons (Bt), and occur in similar landform positions.
Gator soils lack bedrock within depths of 203 centimeters (80 inches), have 41 to 127 centimeters (16 to 50 inches) of organic materials over sandy and loamy materials, and occur on slightly lower landform positions.
Hallandale soils soils have bedrock at depths of less than 51 centimeters (20 inches), lack argillic horizons, and occur on slightly higher landform positions.
Lostmans soils have limestone bedrock at depths less than 51 centimeters (20 inches), lack argillic horizons, contain calcium carbonates, and occur on similar landform positions.
Goddens Strand soils have mollic epipedon at depths less than 81 centimeters (32 inches), have argillic horizon at depth of 81 to 137 centimeters (32 to 54 inches), and are on similar landform positions.
Big Cypress soils consists of gray sandy soil surface about 10 centimeters (4 inches) thick. The subsurface layer is sand about 25 centimeters (10 inches) thick. A sandy light gray albic horizon typically will occur about 10 centimeters (4 inches) below the surface. Thickness of the albic horizons ranges from 30 to 79 centimeters (12 to 31 inches). The subsoil, about 20 centimeters (8 inches) thick, is grayish brown to light gray sandy clay loam with yellowish brown masses and carbonate masses. At a depth of 147 centimeters (58 inches) is a layer of fractured limestone.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Very poorly drained
Saturated hydraulic conductivity (Ksat): Moderately high to high in A horizons and moderately low in the Btg horizon
Permeability: moderate to moderately rapid in the A and E horizons and slow in the Btg or Btkg horizons
Surface runoff: negligible to very low
Depth to seasonal high water table: 0 to 15 centimeters (0 to 6 inches) of the surface.
Surface Water: can range from 15 to 122 centimeters (6 to 48 inches) during the raining season (June to November). During the months of December and January surface water can range from 15 to 91 centimeters (6 to 36 inches). During the dry season February to May surface water ranges from 15 to 76 centimeters (6 to 30 inches).

USE AND VEGETATION:
Major uses: water quality, wildlife habitat, rangeland, farmland, and urban land.
Dominant vegetation: These include but are not limited to scattered cypress (Taxodium), scattered cabbage palmetto (Sabal palmetto), with an undergrowth of threeawns (Aristida), beaksedges (Rhynchospora), yelloweyed grass (Xyris), cordgrass (Spartina), maidencane (Panicum hemitomon), bladderworts (Utricularia), St. Johnswort (Hypericum), and wax myrtle (Morella cerifera). Deeper depressions can support the above species as well as Jamaica swamp sawgrass (Cladium mariscus ssp. jamaicense), pickerelweed (Pontederia cordata) bulltongue arrowhead (Sagittaria lancifolia), bent alligator-flag (Thalia geniculate), and waterlilies (Nymphaea).

DISTRIBUTION AND EXTENT: Everglades and Associated Areas (MLRA 156A)
Extent: limited

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Auburn, Alabama

SERIES ESTABLISHED: Collier County, Florida; 2023.

REMARKS: Diagnostic horizons and features featured in this pedon.

1. Mollic epipedon - 0 to 36 centimeters (0 to 14 inches) (A1 and A2 horizons)
2. Argillic horizon - 46 to 61 centimeters (18 to 24 inches) (Btg horizon)
3. Lithic contact - 76 to 102 centimeters (30 to 40 inches) (3R horizon)
4. Aquic conditions - 0 to 15 centimeters (0 to 6 inches)

This soil is recognized as Copeland in hyperthermic areas.

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: 1990FL621011

OSD Pedon Site ID: 1990FL621011

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National Cooperative Soil Survey
U.S.A.