LOCATION MOSESPRAIRIE WA

Established Series
Rev. EAB/TDT
02/2011

MOSESPRAIRIE SERIES

The Mosesprairie series consists of very deep, very poorly drained soils derived from organic material over glaciolacustrine deposits. Mosesprairie soils are on proglacial lakes on till plains with slopes of 0 to 2 percent. The mean annual precipitation is about 110 inches, the mean annual temperature is about 49 degrees F.

TAXONOMIC CLASS: Dysic, isomesic Sapric Haplohemists

TYPICAL PEDON: Mosesprairie peat on a 0 to 2 percent slope at an elevation of 92 feet. (Colors are for moist soil unless otherwise stated. All textures are apparent field textures.)

Oi--0 to 4 inches; black (7.5YR 2.5/1) rubbed, peat, very dark gray (7.5YR 3/1) exterior, dry; 90 percent unrubbed fiber, 75 percent rubbed; many very fine roots throughout and few medium roots throughout; extremely acid, (pH 4.0); clear smooth boundary. (4 to 8 inches thick)

Oe--4 to 26 inches; black (10YR 2/1) rubbed, mucky peat, very dark gray (10YR 3/1) exterior, dry; 55 percent unrubbed fiber, 20 percent rubbed; many very fine and fine roots throughout and few medium roots throughout; ultra acid, (pH 3.2); gradual smooth boundary. (18 to 27 inches thick)

Oa--26 to 55 inches; black (10YR 2/1) rubbed, muck, very dark gray (10YR 3/1) exterior, dry; 30 percent unrubbed fiber, 5 percent rubbed; common very fine, fine and medium roots throughout; very strongly acid, (pH 4.5); clear smooth boundary. (27 to 40 inches thick)

2Cg--55 to 65 inches; very dark gray (10YR 3/1) silt loam, gray (10YR 6/1) dry; massive; hard, firm and slightly sticky, slightly plastic; very strongly acid, (pH 4.6).

TYPE LOCATION: Grays Harbor County, Washington; about 3.5 miles southeast of Queets, [1 mile south of highway 101 (4600 Loop road)] on the Quinault Indian Reservation; about 915 feet north and 1,640 feet west of the southeast corner of Section 3, Township 23N, Range 13W; Latitude 47 degrees 30 minutes 26.6 seconds North and Longitude 124 degrees 19 minutes 0.4 seconds West.

RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 50 degrees F. The difference between mean summer and winter soil temperature is 5 to 7 degrees. These soils are always moist, and have a surplus of available water on a monthly basis throughout the year; peraquic moisture regime. Depth to the mineral material is 50 inches or more. Depth to sapric material is 24 to 35 inches.

The Oi horizon has hue of 7.5YR moist and dry, value of 2.5 moist and 3 dry, and chroma of 1 moist and dry, broken, rubbed, or pressed. Reaction is extremely acid or very strongly acid.

The Oe layer has hue of 10YR, value of 2 moist and 3 dry, and chroma of 1 moist and dry, broken, rubbed, or pressed. Reaction is ultra acid or extremely acid.

The Oa layer has a hue of 10YR, value of 2 moist and 3 dry, and chroma of 1 moist and dry, broken, rubbed, or pressed. Reaction is strongly acid or very strongly acid.

The 2Cg horizon has hue of 10YR, or 2.5Y, value of 3 or 4 moist, and 5 through 7 dry, and chroma of 1 or 2 moist and 1 dry. Texture is silt loam. Reaction is strongly acid or very strongly acid.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Mosesprairie soils are on proglacial lakes on till plains at elevations of 0 to 390 feet. Slopes are 0 to 2 percent. These soils formed in organic material over glaciolacustrine deposits. The soils are in a mild marine climate and have cool, moist summers and cool, wet winters. The mean annual precipitation is 90 to 120 inches. The average January temperature is about 40 degrees F.; the average July temperature is about 60 degrees F.; and the mean annual temperature is about 49 degrees F. The frost free season is 160 to 220 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aabab, Chowchow, Copalisrock, Kydaka, and Manorcreek soils. Aabab soils are poorly drained and lack a histic epipedon. Chowchow soils are 22 to 38 inches to mineral material. Copalisrock soils are 20 to 40 inches to dense glacial till. Kydaka soils are poorly drained, have a mucky surface horizon, and are 20 to 40 inches to dense glacial till. Manorcreek soils are isofrigid and depth to mineral material is 24 to 36 inches.

DRAINAGE AND PERMEABILITY: very poorly drained; very slow runoff; moderate over moderately slow in the substratum permeability.

USE AND VEGETATION: wildlife habitat and recreation.

DISTRIBUTION AND EXTENT: West side of the Olympic Peninsula in western Washington; MLRA 4A. Series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Grays Harbor County, Washington, 2007; Quinault Indian Reservation.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Organic soil material from 0 to 55 inches
0 to 4 inches fibric material
4 to 26 inches hemic material
26 to 55 inches sapric material

The subsurface tier (30 to 90 cm or 12 to 36 inches) has from 12 to 26 inches hemic material and from 26 to 36 inches sapric material. There is a greater thickness of hemic material within the subsurface tier than any other type of organic material, therefore, hemist.
The organic material contains a layer of sapric material from 26 to 55 inches, therefore, sapric subgroup.

National Cooperative Soil Survey
U.S.A.