LOCATION BROADAXE                FL

Established Series
RBT-ARW
09/2026

BROADAXE SERIES

MLRA(s)--152A, 155
Depth class--Very deep
Drainage class--Subaqueous
Water depth range--50 to 185 centimeters
Parent material--Sandy estuarine deposits over fluviomarine deposits
Geomorphic location--Submerged wave-cut platforms
Soil Organic Carbon Stock to 200 centimeters--20.8 kg m-2
Slope range--0 to 1 percent
Mean annual air temperature--22 degrees C (71.6 degrees F)
Mean annual water temperature--24.7 degrees C (76.6 degrees F)

TAXONOMIC CLASS: Siliceous, hyperthermic Fluventic Psammowassents

TYPICAL PEDON: Broadaxe fine sand on an east facing, 0.5 percent linear slope bare sand submerged wave-cut platform under 0.81 meters of estuarine water. Tidal range is 24 cm. (Colors are for moist soil unless otherwise noted).

Aseg--0 to 18 centimeters; olive gray (5Y 4/2) fine sand; structureless single grain; nonsticky, nonplastic; nonfluid; few very fine and fine and common medium roots throughout; 8 percent shell fragments; strong sulfurous odor; slight reaction 30 percent peroxide; moderately alkaline (pH 8.4); strongly alkaline (pH 8.5) oxidized pH; 1.8 kg m-3 soil organic carbon; clear boundary. (0 to 18 centimeters)

Cseg--18 to 40 centimeters; dark gray (2.5Y 4/1) shelly fine sand; structureless single grain; nonsticky, nonplastic; nonfluid; 15 percent by volume shell fragments; slight sulfurous odor; slight reaction 30 percent peroxide; moderately alkaline (pH 8.0); strongly alkaline (pH 8.6) oxidized pH; 2.1 kg m-3 soil organic carbon; clear boundary. (20 to 164 centimeters thick)

2Aseb--40 to 113 centimeters; black (5YR 2.5/1) fine sand; structureless single grain; nonsticky, nonplastic; nonfluid; no sulfurous odor; slight reaction 30 percent peroxide; neutral (pH 7.2); moderately alkaline (pH 8.0) oxidized pH; 12.1 kg m-3 soil organic carbon; clear boundary. (0 to 41 centimeters thick)

2Bhsseb--113 to 156 centimeters; dark brown (10YR 3/3) fine sand; structureless single grain; nonsticky, nonplastic; nonfluid; no sulfurous odor; slight reaction 30 percent peroxide; slightly alkaline (pH 7.6); slightly alkaline (pH 7.5) oxidized pH; 2.2 kg m-3 soil organic carbon; gradual boundary.

2Bsseb--156 to 239 centimeters; light yellowish brown (2.5Y 6/3) fine sand; structureless single grain; nonsticky, nonplastic; nonfluid; no sulfurous odor; slight reaction 30 percent peroxide; slightly alkaline (pH 7.8); slightly alkaline (pH 7.6) oxidized pH; 2.5 kg m-3 soil organic carbon;. (0 to 131 centimeters thick)

TYPE LOCATION: Brevard County, Florida; approximately 507 meters (1,665 feet) northeast of the intersection 10th Street Southeast and Banana River Drive Northeast on the Kennedy Space Center property and approximately 1.63 kilometers (1.01 miles) west-southwest of the NASA Parkway East bridge navigation channel; USGS topographic quadrangle: Orsino, Florida.
Latitude--28.5103330
Longitude-- -80.6277670
Datum--WGS84
Coordinate source--Manually entered from GPS

RANGE IN CHARACTERISTICS:
Depth to bedrock--Greater than 200 centimeters
Depth to lithologic discontinuity--20 to 164 centimeters (commonly occurs within 1 meter of the soil surface)
Soil moisture--Continuously inundated
Reaction throughout--Slightly alkaline to strongly alkaline (pH 7.4 to 9.0)
Oxidized reaction--Neutral to strongly alkaline (pH 6.6 to 9.0)
Electrical conductivity (1:5 soil-water) throughout--0.6 dS/m or greater
Manner of failure--Nonfluid to slightly fluid
Particle-size control section (weighted average):
Shell fragments--0 to 30 percent in the estuarine deposits, but some thin horizons may have up to 90 percent
Sand--80 to 98 percent
Clay--2 to 10 percent
Total Soil Organic Carbon Stock to 200 centimeters--12.0 to 33.4 kg m-2

Aseg horizon-
Hue--10YR to 10Y or is neutral
Value--3 to 6
Chroma--2 or less
Texture--Fine sand, sand, loamy sand, loamy fine sand, or fine sandy loam
Organic carbon density--1.0 to 2.3 kg m-3

Cseg horizon-
Hue--10YR, 2.5Y, 5Y, 10Y, 5GY, 5G, 10GY, or is neutral
Value--4 to 7
Chroma--2 or less
Texture--Sand, fine sand, loamy sand, loamy fine sand, sandy loam, or fine sandy loam with shelly, very shelly, extremely shelly, or shell analogs
Organic carbon density--1.2 to 3.0 kg m-3

2Asegb horizon-
Hue--5YR to 10Y or is neutral
Value--2 to 5
Chroma--1 or less
Texture--Fine sand, loamy fine sand, loamy sand, or fine sandy loam
Organic carbon density--7.8 to 19.7 kg m-3

2Esegb horizon (where present)-
Hue--7.5YR to 10Y
Value--4 to 7
Chroma--2 or less
Texture--Fine sand, sand, or loamy fine sand
Organic carbon density--1.0 to 3.0 kg m-3

2Bhsseb horizon-
Hue--7.5YR to 2.5Y
Value--2 to 3
Chroma--1 to 3
Texture--Fine sand, loamy fine sand, or loamy sand
Organic carbon density--0.7 to 3.4 kg m-3

2Bsseb horizon-
Hue--7.5YR to 2.5Y
Value--3 to 6
Chroma--2 to 4
Texture-Fine sand, loamy fine sand, loamy sand, or fine sandy loam
Organic carbon density--1.4 to 4.9 kg m-3

2Cseg horizon-
Hue--2.5Y, 5Y, 10Y, 5G, 10GY or is neutral
Value--4 to 7
Chroma--2 or less
Texture--Sand, fine sand, loamy fine sand, loamy sand, sandy loam, fine sandy loam, or sandy clay loam (fine textures are often deeper than 100 centimeters)
Organic carbon density--0.7 to 3.0 kg m-3

COMPETING SERIES:
These are the Eastpoint, Lutz, McKissack, Mullet, Pelican Reef, Sandbank, and Thalinectes series.
Eastpoint soils--are on submerged wave-cut platforms and do not contain buried spodic horizons.
Lutz soils--are on flood-tidal deltas and do not contain buried spodic horizons.
McKissack soils--are on estuarine tidal streams and formed in from eroded, upland spodic material.
Mullet soils--are on washover-fan flats and do not contain buried spodic horizons.
Pelican Reef soils--are on relict flood-tidal deltas, do not contain buried spodic horizons, and have significantly higher soil organic carbon in the surface horizon.
Sandbank soils--are on estuarine tidal stream deltas, do not contain buried spodic horizons, and contain very fine mica flakes throughout the profile.
Thalinectes soils--are on washover-fan flats, do not contain buried spodic horizons, and have significantly higher soil organic carbon in the surface horizon.

GEOGRAPHIC SETTING:
Parent material--Sandy estuarine deposits over fluviomarine deposits
Landscape--Coastal lagoons
Landform--Submerged wave-cut platforms
Slope--0 to 1 percent
Mean annual precipitation--970 to 1570 millimeters (38 to 62 inches)
Mean annual air temperature--20 to 25 degrees C (69 to 77 degrees F)
Water salinity range--18 to 29 parts per thousand
Frost-free period--365 days

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Eastpoint, Endeavor, Ittsanapper, Mullet, and Tea Hammock soils.
Endeavor soils--are on relict flood-tidal delta sand flats and slopes and have considerable shell fragments throughout
Ittsanapper soils--are on lagoon bottom landforms, usually at deeper water depths, and have thicker finer textured materials
Tea Hammock soils--are also on nearby anthropogenic landforms consisting of dredge shoal deposits

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--Subaqueous
Saturated hydraulic conductivity--High or very high
Soil moisture regime--Peraquic
Soil is continuously inundated by saline and brackish water.

USE AND VEGETATION:
Major uses--Used for recreational boating, fishing, and swimming, marinas, mooring fields, and commercial shellfish harvesting; benthic species include tubeworms, clams, crabs, scallops and juvenile finfish.
Native vegetation--Dominant vegetation is driven by water quality and quantity within subaqueous systems. Under excellent water quality these soils support seagrass species including but not limited to shoal grass (Halodule wrightii), manatee grass (Syringodium filiforme), and star grass (Halophila engelmannii). Shallower areas may support widgeongrass (Ruppia maritima). Under degraded / poor water quality seagrass may be replaced by rooted eukaryotic macroalgae in the green (Chlorophyta), red (Rhodophyta), and brown (Phaeophyta) algae families. Caulerpa prolifera (Chlorophyta) is often dominant. Vegetative cover ranges from 0 through 80 percent."

DISTRIBUTION AND EXTENT:
General area--Located along the coasts of Indian River Lagoon, Florida and the Gulf coast
Land Resource Regions--T - Atlantic and Gulf Coast Lowland Forest and Crop Region and U - Florida Subtropical Fruit, Truck Crop, and Range Region
MLRA(s)--152A and 155
Extent--Small

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: SPECIAL PROJECTS OFFICE

SERIES ESTABLISHED: Brevard County, Florida, 2024

REMARKS:
Diagnostic horizons and features in this pedon include--
-Peraquic soil moisture regime--Positive soil water potential (permanently submerged) at the soil surface. (under 0.81 meters of salt water).
-Particle-size control section--The zone from 0 to 100 centimeters (0 to 40 inches).
-Ochric epipedon--the zone from 0 to 18 centimeters (Aseg horizon).
-Lithologic Discontinuity--40 to 239 centimeters (2Aseb, 2Bhsseb, and 2Bsseb horizons).
-Preserved spodic horizon / humilluvic materials--113 to 239 centimeters (2Bhsseb and 2Bsseb horizons).
-Taxonomic version--Keys to Soil Taxonomy, 13th edition (2022). The classification will need to be revised to a Thapto-Humic Psammowassents.

ADDITIONAL DATA:
Typical pedon S2023FL009003. Supporting pedons used to develop this series include: 2021FL009042, 2021FL009069, and 2020FL009010.

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National Cooperative Soil Survey
U.S.A.