PEDON DESCRIPTION

Cont. Site ID: S2011WA041501

Pedon ID: S2011WA041501

Slope (%)	Elevation (meters)	Aspect (deg)	MAAT (C)	MSAT (C)	MWAT (C)	MAP (mm)	Frost-Free Days	Drainage Class	Slope Length (meters)	Upslope Length (meters)
25.0	1,567.0	295	3.9			2,769	90	well

Oi--0 to 1 centimeters (0.0 to 0.4 inches); slightly decomposed plant material; 80 percent sand; 18 percent silt; 2 percent clay; many fine high-continuity interstitial pores; abrupt wavy boundary. Thin discontinuous tephra between Oi and Oe horizons, likely Mt. St. Helens 1980 tephra.

Oe--1 to 3 centimeters (0.4 to 1.2 inches); moderately decomposed plant material; 80 percent sand; 18 percent silt; 2 percent clay; few very fine roots throughout and few fine roots throughout; many fine moderate-continuity interstitial pores; abrupt wavy boundary.

E--3 to 9 centimeters (1.2 to 3.5 inches); 70 percent very dark grayish brown (10YR 3/2) crushed and 30 percent light brownish gray (10YR 6/2) crushed medial loamy sand, light gray (10YR 7/2) crushed, dry; 80 percent sand; 18 percent silt; 2 percent clay; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; common very fine roots throughout and few medium roots throughout and common fine roots throughout; common very fine low-continuity interstitial and common fine low-continuity interstitial pores; , pH indicator strip; abrupt wavy boundary. Lab sample # 13N01068. Horizon likely Mt. St. Helens Wn tephra.

Bs1--9 to 25 centimeters (3.5 to 9.8 inches); dark brown (7.5YR 3/2) crushed medial sandy loam, brown (7.5YR 5/2) crushed, dry; 60 percent sand; 35 percent silt; 5 percent clay; moderate medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; many very fine roots throughout and common medium roots throughout and many fine roots throughout and common coarse roots throughout; common very fine low-continuity irregular and common fine low-continuity irregular pores; 5 percent nonflat subangular moderately coherent cemented 5 to 75-millimeter Pumice fragments and 5 percent nonflat subangular moderately coherent cemented 2 to 5-millimeter Pumice fragments, pH indicator strip; clear wavy boundary. Lab sample # 13N01069

Bs2--25 to 36 centimeters (9.8 to 14.2 inches); dark brown (10YR 3/3) crushed medial loamy sand, brown (10YR 5/3) crushed, dry; 80 percent sand; 18 percent silt; 2 percent clay; moderate medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; common very fine roots throughout and few medium roots throughout and common fine roots throughout and few coarse roots throughout; common very fine moderate-continuity irregular and common fine moderate-continuity irregular pores; 5 percent nonflat subrounded moderately coherent cemented 2 to 5-millimeter Pumice fragments and 5 percent nonflat subrounded moderately coherent cemented 5 to 75-millimeter Pumice fragments, pH indicator strip; clear wavy boundary. Lab sample # 13N01070. Horizon likely Mt. St. Helens Yn tephra. Fragments are pumice, 10YR 6/3 moist.

2Bs3--36 to 74 centimeters (14.2 to 29.1 inches); dark yellowish brown (10YR 4/4) crushed very cobbly medial sandy loam, light yellowish brown (10YR 6/4) crushed, dry; 70 percent sand; 26 percent silt; 4 percent clay; moderate medium subangular blocky structure; soft, very friable, nonsticky, nonplastic; few very fine roots throughout and few medium roots throughout and few fine roots throughout and few coarse roots throughout; common very fine moderate-continuity irregular and common fine moderate-continuity irregular pores; 10 percent nonflat subangular indurated 2 to 5-millimeter Andesite fragments and 15 percent nonflat subangular indurated 5 to 75-millimeter Andesite fragments and 20 percent nonflat subangular indurated 75 to 250-millimeter Andesite fragments, pH indicator strip; clear wavy boundary. Lab sample # 13N01071

2BC--74 to 110 centimeters (29.1 to 43.3 inches); yellowish brown (10YR 5/4) crushed very gravelly medial sandy loam, light yellowish brown (10YR 6/4) crushed, dry; 70 percent sand; 26 percent silt; 4 percent clay; moderate coarse subangular blocky structure; soft, very friable, nonsticky, nonplastic; few very fine roots throughout and few fine roots throughout; common very fine moderate-continuity irregular and common fine moderate-continuity irregular pores; 10 percent nonflat subangular indurated 2 to 5-millimeter Andesite fragments and 15 percent nonflat subangular indurated 75 to 250-millimeter Andesite fragments and 20 percent nonflat subangular indurated 5 to 75-millimeter Andesite fragments, pH indicator strip; abrupt irregular boundary. Lab sample # 13N01072

3R--110 to 150 centimeters (43.3 to 59.1 inches); indurated Andesite bedrock, fractured at intervals of 10 to less than 45 centimeters; .