LOCATION GRIST MILL VA
Tentative Series
Rev. AP/JK
11/2015
GRIST MILL SERIES
MLRA(s): 149A
Depth Class: Very deep
Drainage Class (Agricultural): Well drained
Landscape: Coastal Plain
Parent Material: Marine Sediments
Slope: 0 to 45 percent slopes
Mean Annual Air Temperature (type location): 12.4 degrees C. (54 degrees F.)
Mean Annual Precipitation (type location): 1062 mm (42 inches)
TAXONOMIC CLASS: Fine-loamy, mixed, semiactive, acid, mesic Typic Udorthents
TYPICAL PEDON: Grist Mill sandy loam . (Colors are for moist soil unless otherwise indicated.)
A1--0 to 15 cm (0 to 6 inch), very dark grayish brown (10YR 3/2) loam; strong fine granular structure; very friable; many fine and common medium roots; many fine and medium vesicular and tubular pores; 10 percent rounded quartz gravels; strongly acid; clear smooth boundary.
C1--15 to 43 cm (6 to 17 inches), strong brown (7.5YR 5/6) sandy clay loam; few fine distinct dark yellowish brown (10YR 3/4) mottles; massive structure; friable, moderately sticky, moderately plastic; common fine and very fine roots; 2 percent rounded quartz gravels; strongly acid; clear wavy boundary.
C2--43 to 102 cm (17 to 40 inches), yellowish brown (10YR 5/6) sandy clay loam; massive structure; firm, moderately sticky, very plastic; 10 percent rounded quartz gravels; strongly acid; clear smooth boundary.
C3--102 to 114cm (40 to 45 inches), dark yellowish brown (10YR 4/6) sandy clay loam; massive structure; friable, slightly sticky, slightly plastic; common medium prominent light brownish gray (10YR6/2), iron depletions; 2 percent rounded quartz gravels; strongly acid; clear smooth boundary.
2C4--114 to 132 cm (45 to 52 inches), gray (2.5Y 5/1) clay; common medium distinct yellowish brown (10YR5/6) mottles; massive structure; firm, slightly sticky, slightly palstic; 2 percent rounded quartz gravels; strongly acid; clear smooth boundary.
3C5--132 to 147 cm (52 to 58 inches), yellowish red (5YR 4/6) clay; massive structure; firm, moderately sicky, moderately plastic; 2 percent rounded quartz gravels; strongly acid; abrupt wavy boundary.
4C6--147 to 152 cm (58 to 60 inches), grayish brown (2.5Y 5/2) sandy loam; massive structure; very friable, nonsticky, nonplastic; 2 percent rounded quartz gravels; strongly acid.
TYPE LOCATION: Fairfax County, Virginia; located in Mason Neck West Area Park along the southeast edge of the tennis courts, 410 feet northwest of the park entrance on Old Colchester road and 530 feet north northeast of the intersection of Old Colchester road and Greene Dr. Latitude 38 degrees, 40 minutes, 32.2 seconds north and Longitude 77 degrees, 13 minutes, 36.8 seconds west
RANGE IN CHARACTERISTICS:
Depth to Bedrock: Greater than 183 cm (72 inches)
Depth to Seasonal High Water Table: 102cm (40 inches) to Greater than 183 cm (72 inches), November to May
Rock Fragment content: 0 to 35 percent, by volume, throughout.
Soil Reaction: moderately acid to very strongly acid, except where limed
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon (if it occurs):
Color--hue of 5YR to 10YR, value of 3 to 5, and chroma of 2 to 4
Texture (fine-earth fraction)loam, sandy loam or fine sandy loam
C horizon:
Color--hue of 5YR to 2.5Y, value of 4 to 8, and chroma of 1 to 8
Texture (fine-earth fraction)clay, clay loam, silt loam, sandy clay loam,loam, sandy loam, loamy sand, or fine sandy loam
COMPETING SERIES:
Kingstowne soils--are found on higher elevations in the coastal plain
Wheaton soils--are found on parent materials derived from phyllites, and mica schists.
GEOGRAPHIC SETTING:
Landscape: Coastal Plain
Landform: Uplands
Hillslope Profile Position: Summit, shoulder, and backslopes
Geomorphic Component: Interfluves
Parent Material: Marine sediments
Slope: 0 to 45 percent
Frost-free period: 150 to 194 days
Mean Annual Air Temperature: 6.2 to 18.7 degrees C. (43 to 65 degrees F.)
Mean Annual Precipitation: 904 to 1202 mm (37 to 47 inches)
GEOGRAPHICALLY ASSOCIATED SOILS:
Mattapex soil--are moderately well drained, and have an Argillic horizon
Matapeake soils--are well drained, and have an Argillic horizon
Elkton soils--are poorly drained, and have an Argillic horizon
Gunston soils--are somewhat poorly drained, and have an argillic horizon
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class (Agricultural): Well drained
Internal Free Water Occurrence: Deep (102cm) to very deep (greater than 150 cm)(highly variable)
Flooding Frequency and Duration: None
Ponding Frequency and Duration: None
Index Surface Runoff: moderate to very high
Saturated Hydraulic Conductivity: Moderately high to very slow
Permeability (obsolete): Moderate to slow
Shrink-swell Potential: Low to moderate
USE AND VEGETATION:
Major Uses: urban development
Dominant Vegetation: Where wooded--black oak, chestnut oak, red oak, white oak, hickory, yellow popular, red maple, shortleaf pine and Virginia pine.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: RALEIGH, NORTH CAROLINA
Distribution: Virginia
Extent: Small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES PROPOSED: Fairfax County, Virginia, 2006.
REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Ochric epipedon--the zone from 0 to 25 cm (0 to 10 inches) (Ap and C1 horizons)
ADDITIONAL DATA: S04-VA059-5-2
OSD Data Map Unit ID: To be developed
Typical Pedon Data Mapunit ID: To be developed
OSD User Pedon ID: Grist Mill S04-VA059-5-2
National Cooperative Soil Survey
U.S.A.