LOCATION MARMOTLAKE WA
Tentative Series
IRD. MGR/AJF/MPR
01/2025
MARMOTLAKE SERIES
Landscape--mountains
Landform--ridges and glacial valley walls
Slope--15 to 100 percent
Parent material--residuum
Mean annual precipitation--about 2000 mm
Mean annual air temperature--about 2 degrees C
Depth class--moderately deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, isotic Typic Dystrocryepts
TYPICAL PEDON: Marmotlake very gravelly loam on an east-facing, forested ridge with a slope of 40 percent and an elevation of 1500 m. (The soil was moist throughout when described.)
Oi--0 to 2 cm; slightly decomposed plant material; abrupt wavy boundary
A--2 to 25 cm; yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) very gravelly loam; weak fine subangular blocky structure; soft, very friable, moderately sticky, moderately plastic; few very fine and fine and common medium and coarse and many very coarse roots; common fine irregular pores; 40 percent gravel; very strongly acid (pH 4.6); clear wavy boundary
Bw--25 to 57 cm; light yellowish brown (10YR 6/4) dry, yellowish brown (10YR 5/4) very gravelly loam; weak fine subangular blocky structure; soft, very friable, slightly sticky, moderately plastic; common very fine, fine, medium, and coarse and few very coarse roots; common medium interstitial and common fine irregular pores; 50 percent gravel, 5 percent cobbles; very strongly acid (pH 4.7); clear wavy boundary
C--57 to 84 cm; light yellowish brown (10YR 6/4) dry, yellowish brown (10YR 5/4) extremely gravelly loam; massive structure; loose, loose, slightly sticky, very plastic; common very fine, fine, medium, and coarse and few very coarse roots; common medium interstitial pores; 50 percent gravel, 20 percent cobbles; very strongly acid (pH 4.7); abrupt irregular boundary
R--84 cm; bedrock
TYPE LOCATION: Clallam County, Washington; near Deer Park campground in Olympic National Park
Latitude--47.9473595
Longitude-- -123.2698546
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--0 to 3 degrees C
Depth to restrictive layer--50 to 100 cm
Particle-size control section
*Clay content--8 to 25 percent
*Total rock fragment content--50 to 75 percent
*Gravel content--45 to 70 percent
*Cobble content--0 to 30 percent
*Stone content--0 to 15 percent
O horizon
Thickness--0 to 5 cm
A horizon
Value--3 to 5 dry or moist
Chroma--2 to 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Clay content--8 to 25 percent
Total rock fragment content--20 to 50 percent
Gravel content--20 to 50 percent
Cobble content--0 to 20 percent
Reaction--4.5 to 5.5
Thickness--20 to 30 cm
Bw horizon
Value--4 to 6 dry or moist
Chroma--3 or 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Clay content--8 to 25 percent
Total rock fragment content--50 to 75 percent
Gravel content--45 to 70 percent
Cobble content--0 to 30 percent
Stone content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--20 to 35 cm
C horizon
Value--4 to 6 dry or moist
Chroma--3 or 4 dry or moist
Fine-earth texture--silt loam, loam, sandy loam
Clay content--8 to 25 percent
Total rock fragment content--50 to 75 percent
Gravel content--45 to 70 percent
Cobble content--0 to 30 percent
Stone content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--20 to 30 cm
COMPETING SERIES:
Bensley,
Cascadecreek,
Fallriver,
Henson,
Kanguq,
Stuyahok,
Grandpass, and Mountstone --lithic contact below 150 cm from the soil surface
Golsovia--paralithic contact within 100 to 150 cm of the soil surface
Endlich--Bw horizon has 5YR and 7.5YR colors, and extremely hard consistence
Sharp--lithic contact within 100 to 150 cm of the soil surface
GEOGRAPHIC SETTING:
Elevation--1400 to 1900 m
Climate--cool, dry summers; cold, wet winters
Mean annual precipitation--1750 to 2500 mm
Mean annual air temperature--0 to 4 degrees C
Frost-free period--30 to 60 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Grandpass--no lithic contact; similar landforms
Allincreek--lithic contact within 25 to 50 cm, umbric epipedon; structural benches
Lakedilly--aquic conditions within 0 to 25 cm of the mineral soil surface; depressions on similar landforms
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat, recreation
Potential natural vegetation--subalpine fir, lodgepole pine, common juniper, Oregon boxleaf, broadleaf lupine
DISTRIBUTION AND EXTENT: Olympic Mountains, Washington; MLRA 1; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Clallam County, Washington 2023; name from Marmotlake in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon:
*Particle-size control section--zone from 27 to 84 cm
*Ochric epipedon
*Cambic horizon--zone from 25 to 57 cm
*Lithic contact--84 cm
National Cooperative Soil Survey
U.S.A.