USDA - Soil Conservation Service
Pedon Narrative Description
DATE Sampled: 09/01/1992

Soil Series: SACO

Map Unit Name: Saco mucky silt loam, 0 to 3 percent slopes

Site Identification #: 92MA023012

Map Unit Symbol: 5A Note ID: Yield ID:

Laboratory Information

Lab Pedon #: 2300503 Source Lab Id:

Location Information

Soil Survey Area #: 023 MLRA: 144A

County FIPS Code:

County Name: Plymouth County, Massachusetts

Soil Survey Area Name: Plymouth County, Massachusetts

Location Description: Bridgewater Quad, town of Middleboro, 150 feet north of the Nemasket River 150 feet SW of where the Nemasket River joins the Taunton River, 300 feet east of the railroad tracks.

Quadrangle Name: Bridgewater Quad

Latitude: 41 degrees 56 minutes 5.0 seconds N

Longitude: 70 degrees 56 minutes 16.0 seconds W

UTM Zone: UTM Easting: UTM Northing:

Description Category: Full pedon description

Pedon Category:

Slope Characteristics Information
Slope: 0 percent
Horizontal Shape:
Vertical Shape: Convex

Elevation: 15.0 feet

Local: Flood Plain
Major: Glaciofluvial Landform *

Microrelief: mound , Elevation: 4.0 inches

Flooding Information
Frequency: Frequent

Type of Erosion: water erosion

Degree of Erosion: Class 1

Classification: ____ , ____ , ____ , ____ , ____ ____

Moisture Regime: Udic moisture regime

Landuse: Wetlands
Stoniness: 0.00 percent
Permeability: Very slow

Natural Drainage Class: VPD

Parent Material: Weathered alluvium from mixed-igneous-metamorphic & sedimentary

Vegetative Information
Plant Symbol:
Plant Name: Reed Canary Grass, Sedges

Described by: Jim Turenne, Judy Bartos, Nicky Shirt, Richard Bonner

Notes: Weather - sunny, dry, breezy, 70 degrees F., sampled by Judy Bartos, UMass, water table @ 80 cm, seepage at 46 cm.


Oi-- 1 to 0 inches; fibric material; abrupt smooth boundary. Undecomposed sedges & grasses.


Oe-- 0 to 3 inches; dark brown (7.5YR 3/2) and black (10YR 2/1), crushed, partially decomposed organic matter; very friable; common medium roots throughout and common very fine and fine throughout; 5.3 Bromcresol green; clear smooth boundary. 1st color (7.5YR 3/2) is unrubbed; 2nd color is rubbed color.


A-- 3 to 6.5 inches; black (10YR 2/1) mucky silt loam; weak fine granular structure; very friable, nonsticky and nonplastic; common very fine roots throughout and common fine throughout; 5.2 Bromcresol green; gradual smooth boundary.


Cg1--6.5 to 18 inches; dark gray (5Y 4/1) silt loam; common medium and coarse prominent dark olive brown (2.5Y 3/3) and common medium and coarse faint strong brown (7.5YR 5/8) mottles; massive; friable, nonsticky and nonplastic; common very fine roots throughout; 5.2 Bromcresol green; 1 percent rounded mixed gravel; gradual wavy boundary. Mottles are oxidized rhizospheres 1-2mm wide, greater than 5cm long.


Cg2--18 to 27 inches; very dark gray (5Y 3/1) silt loam and fine sand; common medium prominent dark gray (10YR 4/1) mottles; massive; friable, nonsticky and nonplastic; common very fine roots throughout; 5.6 Chlorophenol red; common coarse irregular soft dark masses; clear wavy boundary. Weak hydrogen sulfide odor in Cg2; few pockets of fine sand in Cg2; Cg2 - organic (charcoal) staining on ped faces 7.5YR 2/0 ~ 5% of horizon.


Ab--27 to 40 inches; very dark brown (10YR 2/2) and dark gray (5Y 4/1) mucky fine sand; massive; very friable; 5.6 Chlorophenol red; 1 percent rounded mixed gravel; abrupt smooth boundary. Moderate H2S odor in Ab horizon; few pockets of fine sand 5Y 4/1 in Ab; Ab horizon is an old surface layer - high percentage of fiberous organic matter intermixed with mineral sandy material - need lab data for organic carbon %.


Cg3--40 to 49 inches; dark gray (5Y 4/1) fine sand; single grain; loose; 6.4 Bromthymol blue; 1 percent rounded mixed gravel and 10 percent rounded; abrupt smooth boundary. 10% coarse woody fragments in Cg3 (twig & branch fragments).


Cg4--49 to 72 inches; dark gray (5Y 4/1) very gravelly sand; single grain; loose; 6.7 Bromthymol blue; 25 percent subrounded mixed gravel. Gravel content of lower Cg4 goes as high as 50-60% (25% is average).

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