LOCATION SAGAMORE CA

Tentative Series
IRD: GMW/LJL/CAH/ET
02/2025

SAGAMORE SERIES

The Sagamore series consists of shallow to a petrocalcic horizon, somewhat excessively drained soils that formed in alluvium derived from limestone. The Sagamore soils are on ballenas and fan remnants. Slopes range from 2 to 30 percent. The mean annual precipitation is about 200 mm and the mean annual temperature is about 15 degrees C.

TAXONOMIC CLASS: Loamy, carbonatic, thermic, shallow Calcic Petrocalcids

TYPICAL PEDON: Sagamore gravelly fine sandy loam, on an east facing, linear, 8 percent slope under rangeland at an elevation of 1389 meters. (Colors are for dry soils unless otherwise noted. 6/23/2011 actual site observation date.) The soil surface is covered by approximately 40 percent fine gravel, 25 percent medium and coarse gravel.

A--0 to 5 cm (0 to 2 inches); pale brown (10YR 6/3) gravelly fine sandy loam, brown (10YR 4/3) moist; weak medium subangular blocky structure; soft, very friable, noncoherent, nonsticky and nonplastic; many very fine roots throughout; common very fine irregular pores; 6 percent fine gravel, 5 percent medium petrocalcic gravel, 11 percent medium and coarse gravel; electrical conductivity is 0.2 dS/m; violent effervescence (30 percent calcium carbonate equivalent of the fine earth fraction); moderately alkaline (pH 8.1); clear smooth boundary. Lab sample # 13N05913 (3 to 5 cm, 1 to 2 inches thick)

Bk--5 to 17 cm (2 to 7 inches); pale brown (10YR 6/3) gravelly fine sandy loam, brown (10YR 4/3) moist; moderate coarse subangular blocky structure; soft, very friable, noncoherent, slightly sticky and nonplastic; common very fine roots throughout; common very fine irregular pores; 50 percent prominent white (10YR 8/1), dry, carbonate coats on bottom surfaces of rock fragments; 6 percent fine gravel, 3 percent medium petrocalcic gravel, 7 percent medium and coarse gravel; electrical conductivity is 0.2 dS/m; violent effervescence (35 percent calcium carbonate equivalent of the fine earth fraction); moderately alkaline (pH 8.3); clear smooth boundary. Lab sample # 13N05914 (0 to 13 cm, 0 to 5 inches thick)

Bkq--17 to 34 cm (7 to 13 inches); light yellowish brown (10YR 6/4) gravelly fine sandy loam, dark yellowish brown (10YR 4/4) moist; moderate coarse subangular blocky structure; soft, very friable, noncoherent, slightly sticky and nonplastic; common very fine roots throughout; common very fine irregular pores; 2 percent prominent very pale brown (10YR 7/3), dry, silica coats on concretions and 90 percent distinct white (10YR 8/1), dry, carbonate coats on bottom surfaces of rock fragments; 2 percent coarse prominent pendular strongly coherent cemented white (10YR 8/1) carbonate nodules with sharp boundaries on bottom of rock fragments and 3 percent coarse prominent irregular strongly coherent cemented white (10YR 8/1) carbonate nodules with sharp boundaries in matrix; 8 percent fine gravel, 10 percent medium petrocalcic gravel, 4 percent medium and coarse gravel, 2 percent cobbles; electrical conductivity is 0.2 dS/m; violent effervescence (45 percent calcium carbonate equivalent of the fine earth fraction); moderately alkaline (pH 8.2); abrupt smooth boundary. Lab sample # 13N05915 (15 to 23 cm, 6 to 9 inches thick)

Bkkqm1--34 to 84 cm (13 to 33 inches); white (10YR 8/1) cemented very gravelly coarse sandy loam, light gray (10YR 7/2) moist; weak very thick platy structure; extremely hard, extremely firm, moderately coherent by carbonates and silica, nonsticky and nonplastic; brittle; few fine roots in cracks and few very fine roots in cracks; common very fine interstitial pores; 2 percent prominent very pale brown (10YR 7/3), dry, silica coats on concretions; 9 percent fine gravel, 24 percent medium gravel, 1 percent coarse gravel, 8 percent cobbles, 2 percent stones; electrical conductivity is 0.1 dS/m; violent effervescence (55 percent calcium carbonate equivalent of the fine earth fraction); strongly alkaline (pH 8.5); clear smooth boundary. Lab sample # 13N05916 (10 to 50 cm, 4 to 20 inches thick)

Bkkqm2--84 to 120 cm (33 to 47 inches); white (10YR 8/1) cemented very gravelly sandy loam, light gray (10YR 7/2) moist; massive; very hard, very firm, weakly coherent by carbonates and silica, nonsticky and nonplastic; brittle; few fine roots in cracks and few very fine roots in cracks; common very fine interstitial pores; 2 percent prominent very pale brown (10YR 7/3), dry, silica coats on concretions; 13 percent fine gravel, 31 percent medium gravel, 1 percent coarse gravel, 5 percent cobbles, 1 percent stones; electrical conductivity is 0.1 dS/m; violent effervescence (60 percent calcium carbonate equivalent of the fine earth fraction); strongly alkaline (pH 8.5). Lab sample # 13N05917

TYPE LOCATION: San Bernardino County, California; approximately 2 miles north and 1 mile west of OX Ranch located in the northern part of Lanfair Valley; about 2,660 feet south and 280 feet west of the northeast corner of section 2, T. 13 N., R. 16 E., San Bernardino Baseline and Meridian; USGS Grotto Hills, California 7.5 minute topographic quadrangle; 35 degrees, 14 minutes, 12.29 seconds north latitude and 115 degrees, 13 minutes, 17.91 seconds west longitude; UTM zone 11 661818e, 3900748n, NAD83.

RANGE IN CHARACTERISTICS:
Soil moisture: usually dry, moist in some part from December to March and intermittently moist for 10 to 20 days during July to September following summer convection storms; aridic moisture regime that borders on ustic.

Soil temperature: 15 to 19 degrees C. (59 to 66 degrees F.)
Surface rock fragments: 65 to 70 percent with 40 to 65 percent gravel, 0 to 20 percent cobbles, 0 to 4 percent stones and 0 to 2 percent boulders.
Depth to calcic horizon: 3 to 17 cm.
Depth to petrocalcic horizon: 25 to 36 cm.

Control Section
Clay content: 7 to 12 percent.
Rock fragments: 15 to 35 percent including 0 to 15 percent petrocalcic fragments, and 0 to 10 percent cobbles and stones.
Calcium carbonate equivalence of the less than 20 millimeter fraction: 40 to 70 percent.

A horizon
Value: 5 or 6 dry.
Texture of the fine earth: sandy loam or fine sandy loam.
Clay content: 7 to 12 percent.
Rock fragments: 15 to 30 percent gravel.
Calcium carbonate equivalence of the fine earth fraction: 15 to 35 percent.
Reaction: slightly alkaline or moderately alkaline.

Bk horizon (when present)
Value: 5 or 6 dry.
Texture of the fine earth: sandy loam or fine sandy loam.
Clay content: 7 to 12 percent.
Rock fragments: 15 to 30 percent gravel and cobbles.
Calcium carbonate equivalence of the fine earth fraction: 15 to 40 percent.
Reaction: moderately alkaline or strongly alkaline.
Visible secondary carbonates: 0 to 3 percent, fine to coarse, weakly to very strongly cemented calcium carbonate nodules and 25 to 95 percent calcium carbonate coats on the bottom of rock fragments.

Bk/Bkq horizon(s)
Value: 5 or 6 dry.
Chroma: 3 or 4 dry or moist.
Texture: sandy loam or fine sandy loam.
Clay content: 8 to 14 percent.
Rock fragments: 15 to 35 percent gravel and cobbles.
Calcium carbonate equivalence of the fine earth fraction: 30 to 60 percent.
Visible secondary carbonates: 5 to 15 percent, fine to coarse, weakly to very strongly cemented calcium carbonate nodules and 90 to 100 percent calcium carbonate coats on rock fragments.

Bkkqm or Bkk horizon(s)
Hue: 10YR or 2.5Y, dry or moist.
Value: 7 or 8 dry, 5 to 7 moist.
Chroma: 1 or 2 dry, 2 or 3 moist.
Texture of the fine earth: sand, loamy sand, loamy coarse sand, coarse sandy loamy or sandy loam.
Clay content: 2 to 6 percent.
Rock fragments: 10 to 60 percent gravel.
Calcium carbonate equivalence of the fine earth fraction: 30 to 60 percent.
Reaction: moderately alkaline or strongly alkaline.
Cementation class: weakly to strongly cemented, 60 to 100 percent continuity.

COMPETING SERIES: These are the Bard, Crossen, Mormon Mesa, Upton, and Woda series. Bard, Mormon Mesa, and Woda soils have typic aridic soil moisture regimes. Bard soils are redder in the calcic horizon with 5YR or 7.5YR hues and have a petrocalcic horizon at a depth greater than 36 cm. Crossen and Upton soils have an indurated petrocalcic horizon.

GEOGRAPHIC SETTING: Sagamore soils are on ballenas and fan remnants. Slopes are 2 to 30 percent. These soils formed in alluvium derived from limestone. Elevation is 1,265 to 1,530 meters (4,150 to 5,020 feet). The climate is arid with cool, moist winters and warm, moist summers. Mean annual precipitation is 175 to 225 mm (7 to 9 inches). The mean annual air temperature is 13 to 17 degrees C (55 to 63 degrees F). Frost free season is 210 to 270 days.

GEOGRAPHICALLY ASSOCIATED SOILS: This is Stonekey (T) soils. The Stonekey soil is moderately deep to a petrocalcic horizon.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat excessively drained; very high runoff; high saturated hydraulic conductivity above the petrocalcic horizon and low within the petrocalcic horizon.

USE AND VEGETATION: Sagamore soils are used for recreation and wildlife habitat. Native vegetation is black grama, galleta, Joshua tree, banana yucca, and Nevada jointfir.

DISTRIBUTION AND EXTENT: Mojave Desert of southeastern California; MLRA 30. These soils are of small extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Davis, California.

SERIES PROPOSED: San Bernardino County, California; Soil Survey of Mojave National Preserve Area, California, 2011.The name is coined from Sagamore Canyon located within the survey area.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - the zone from 0 to 17 cm (A and Bk horizons)
Calcic horizon - the zone from 17 to 34 cm (Bkq horizon)
Petrocalcic horizon - the zone from 34 to 120 cm (Bkkqm1 and Bkkqm2 horizons)
Particle size control section - the zone from 0 to 34 cm (A, Bk, and Bkq horizons)

ADDITIONAL DATA: NASIS User Site/Pedon ID: S2013CA071005Lab. Originally setup on pedon 2011CA071251 in map unit 4300. Type location was moved to pedon S2013CA071005Lab (formerly 2011CA071044) in map unit 4305 after being sampled by the NSSL.

National Cooperative Soil Survey
U.S.A.