LOCATION MARYMERE WA
Tentative Series
IRD. AJF/MGR/MPR
01/2025
MARYMERE SERIES
Landscape--river valleys
Landform--alluvial terraces
Slope--0 to 15 percent
Parent material--alluvium
Mean annual precipitation--about 2500 mm
Mean annual air temperature-- about 12 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--isomesic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, active, isomesic Typic Dystrudepts
TYPICAL PEDON: Marymere silt loam on a forested alluvial terrace with a slope of 7 percent and an elevation of 230 m. The soil was moist throughout when described.
Oi--0 to 5 cm; slightly decomposed plant material; clear smooth boundary
A--5 to 11; dark grayish brown (10YR 4/2) dry, very dark grayish brown (10YR 3/2); silt loam; weak medium granular structure; soft, very friable, slightly sticky, slightly plastic; weakly smeary; common very fine and fine, and few medium roots; common fine irregular and tubular pores; 10 percent gravel; very strongly acid (pH 4.9); clear smooth boundary
Bw1--11 to 31 cm; brown (10YR 4/3) dry, dark brown (10YR 3/3); gravelly loam; weak fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; common very fine and fine, and few medium roots; common fine irregular and tubular pores; very strongly acid (pH 5.1); 30 percent gravel; clear smooth boundary
Bw2--31 to 54 cm; brown (10YR 4/3) dry, dark brown (10YR 3/3); very gravelly loam; weak fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; common fine, and few medium roots; many medium tubular, and few fine irregular pores; 35 percent gravel, 5 percent cobbles; very strongly acid (pH 5.2); clear smooth boundary
Bw3--54 to 66 cm; brown (10YR 5/3) dry, brown (10YR 4/3); very gravelly sandy loam; weak very fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; few medium roots; common medium interstitial pores; 45 percent gravel, 5 percent cobbles; very strongly acid (pH 5.3); clear smooth boundary
BC--66 to 150 cm; brown (10YR 5/3) dry, brown (10YR 4/3); very gravelly sandy loam; weak very fine subangular blocky structure; soft, very friable, non-sticky, non-plastic; few medium roots; common medium interstitial pores; 50 percent gravel, 5 percent cobbles; very strongly acid (pH 5.4)
TYPE LOCATION: Olympic National Park, Clallam County, Washington; South Fork Hoh River Trail, approximately 1.5 miles from trailhead.
Latitude--47.789082
Longitude-- -123.927908
Datum--WGS84
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--10 to 15 degrees C
Mean summer soil temperature--12 to 17 degrees C
Particle-size control section
*Clay content--8 to 17 percent
*Total rock fragment content--35 to 60 percent
*Gravel content--35 to 60 percent
*Cobble content--0 to 15 percent
Oi horizon
Horizon thickness--2 to 10 cm
A horizon
Value--2 or 3 moist; 3 or 4 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--silt loam, loam
Clay content--8 to 17 percent
Gravel content--0 to 15 percent
Reaction--4.5 to 5.5
Thickness--5 to 15 cm
Bw horizons
Hue--10YR, 7.5YR, or 2.5Y
Value--3 to 5 moist or dry
Chroma--1 to 3 moist or dry
Fine-earth texture--loam, sandy loam
Clay content--8 to 17 percent
Total rock fragment content--35 to 60 percent
Gravel content--25 to 50 percent
Cobble content--0 to 15 percent
Reaction--4.5 to 5.5
Combined thickness--40 to 70 cm
BC or C horizon
Hue--10YR or 2.5Y
Value--3 to 5 moist or dry
Chroma--1 to 3 moist or dry
Fine-earth texture--sandy loam, loamy sand
Clay content--5 to 15 percent
Total rock fragment content--35 to 60 percent
Gravel content--35 to 60 percent
Cobble content--0 to 10 percent
Reaction--4.5 to 5.5
Thickness--50 to 100 cm
COMPETING SERIES:
Calfranch-Bw and C horizons within the particle size control section have greater than 60 percent channers and flagstones rock fragments
Capeblanco--has lithic contact within 100 cm of the soil surface
GEOGRAPHIC SETTING:
Elevation--50 to 300 m
Climate--warm, moist summers; mild, wet winters
Mean annual precipitation--2000 to 3000 mm
Mean annual air temperature--10 to 14 degrees C
Frost-free period--180 to 240 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Hatana--has cambic horizon; occurs on similar landforms with less frequent flooding interval
Muscott--somewhat excessively well drained; occurs on similar landforms
Rica--has aquic conditions within 50 cm of soil surface; occurs on depressions on similar landforms
Mountmeany--has umbric epipedon and coarse loamy particle size class; occurs on similar landforms with less frequent flooding
Cragcreek--has sandy-skeletal particle size class; occurs on similar landforms with more frequent flooding
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--very rare
Ponding--none
Saturated hydraulic conductivity (Ksat)--high or very high throughout
USE AND VEGETATION:
Use--wildlife habitat and recreation
Potential natural vegetation--Sitka spruce, western hemlock, vine maple, red huckleberry, oval-leaf huckleberry, western swordfern, salmonberry, Oregon oxalis, western cordilleran bunchberry
DISTRIBUTION AND EXTENT: Olympic Mountains and Coast, Washington; MLRA's 1 and 4a; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Olympic National Park, Clallam County, Washington 2023; name from Marymere Falls in Olympic National Park
REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 30 to 105 cm
*Ochric epipedon
*Cambic diagnostic horizon--zone from 11 to 66 cm
National Cooperative Soil Survey
U.S.A.