LOCATION GRANDEPOSIT NV
Established Series
Rev. CWL/PWB/JBF
11/2016
GRANDEPOSIT SERIES
The Grandeposit series consists of shallow, well drained soils that formed in colluvium over residuum from quartzite and slate. The Grandeposit soils are on backslopes of mountains. Slopes are 15 to 50 percent. The mean annual precipitation is about 450 mm and the mean annual temperature is about 5 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Lithic Argixerolls
TYPICAL PEDON: Grandeposit gravelly loam--forestland. (Colors are for dry soil unless otherwise noted.) The soil surface is partially covered with approximately 40 percent gravel, 15 percent cobbles, and 2 percent stones.
A1--0 to 5 cm; grayish brown (10YR 5/2) gravelly loam, very dark grayish brown (10YR 3/2) moist; weak coarse subangular blocky structure parting to strong medium granular; soft, very friable, slightly sticky and nonplastic; common very fine and fine, and few medium roots; common very fine and fine, and few medium interstitial and tubular pores; 20 percent gravel and 5 percent cobbles; neutral (pH 6.9); clear smooth boundary. (3 to 15 cm thick)
A2--5 to 18 cm; brown (10YR 5/3) very gravelly loam, dark brown (10YR 3/3) moist; moderate coarse subangular blocky structure parting to moderate medium subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; common very fine and fine, and few medium roots; common very fine, fine and medium interstitial and tubular pores; 35 percent gravel and 10 percent cobbles; neutral (pH 7.2); clear smooth boundary. (5 to 15 cm thick)
Bt1--18 to 33 cm; yellowish brown (10YR 5/4) very gravelly clay loam, brown (10YR 4/3) moist; strong medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few very fine, medium, and very coarse, and common fine and coarse roots; few very fine and fine, and common medium interstitial and tubular pores; common distinct clay films on faces of peds; 40 percent gravel and 10 percent cobbles; slightly alkaline (pH 7.6); clear smooth boundary. (8 to 20 cm thick)
Bt2--33 to 48 cm; light yellowish brown (10YR 6/4) extremely gravelly clay loam, dark yellowish brown (10YR 4/4) moist; moderate medium subangular blocky structure; hard, firm, very sticky and moderately plastic; few very fine, medium, and coarse, and common fine roots; few very fine, fine, and medium interstitial pores; few faint clay films on faces of peds; 50 percent gravel and 15 percent cobbles; slightly alkaline (pH 7.7); abrupt smooth boundary. (8 to 20 cm thick)
R--48 cm; indurated quartzite bedrock.
TYPE LOCATION: White Pine County, Nevada; about 1 miles west of Piermont Mine and about 0.25 miles north of Piermont Creek on hillside; USGS North Schell Peak 7.5 minute topographic quadrangle; latitude 39 degrees 29 minutes 4.4 seconds N and longitude 114 degrees 33 minutes 58.4 seconds W; WGS84 Decimal Degrees 39.4845556 latitude, -114.5662222 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Usually dry; moist in winter and spring, dry in all parts at least 45 consecutive days following the summer solstice (July and August); Xeric soil moisture regime bordering on aridic.
Soil temperature: 5.5 to 8 degrees C.
Mollic epipedon thickness: 18 to 30 cm, and may include the upper part of the Bt horizon.
Argillic horizon thickness: 13 to 30 cm.
Depth to Lithic contact: 36 to 50 cm.
Particle-size control section - Clay content: Averages 27 to 35 percent.
Rock fragment content: Averages 35 to 60 percent, mainly gravel. Lithology of the fragments is quartzite and slate.
A horizons
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Organic matter: 2 to 4 percent.
Reaction: Neutral or slightly alkaline.
Bt horizons
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 3 or 4, dry or moist.
Clay content: 27 to 35 percent.
Rock fragments: 35 to 65 percent.
Reaction: Slightly alkaline or moderately alkaline.
COMPETING SERIES: These are the
Anaud,
Bellenmine,
Celeridge,
Cleavage,
Cleavmor,
Cropper,
Gabica,
Gaciba,
Genoa,
Gerdog,
Gidwin,
Granquin,
Grosschat,
Hawkridge,
Hutchley,
Loope,
Majorsplace,
Mascamp,
Melling,
Pernog,
Pernty,
Rozara,
Shalcleav,
Shalper,
Slatter,
Tractuff, and
Tweener series.
Anaud and
Granquin soils have 15 to 30 percent volcanic glass in the 0.02 mm to 2.0 mm fraction.
Bellenmine soils are slightly acid or neutral throughout the profile.
Celeridge soils have mollic epipedon that are 36 to 50 cm thick.
Cleavage soils are derived from rhyolite, welded tuff, chert, and shale.
Cleavmor soils have mollic epipedons 36 to 50 cm thick and have Btk horizons.
Cropper soils have 60 to 75 percent rock fragments in the particle-size control section.
Gabica soils are derived from volcanic rocks and are slightly acid or neutral throughout the profile.
Gaciba soils have less than 27 percent clay in their Bt horizons.
Genoa soils are derived from granitic rocks.
Gerdog soils are 18 to 36 cm deep to a lithic contact, have rock fragments that are derived from volcanic rocks.
Gidwin soils have less than 27 percent clay in their control section and mollic epipedons 36 to 50 cm thick.
Grosschat soils are 25 to 36 cm to bedrock.
Hawkridge soils are 18 to 36 cm deep to a lithic contact.
Hutchley soils have mollic epipedons that include all of their Bt horizons.
Loope soils have 14 to 18 percent clay in the particle-size control section and are 25 to 36 cm deep to bedrock.
Mascamp soils are dominated by stones and cobbles in the control section, are influenced by volcanic glass and have secondary carbonate coating on bedrock.
Majorsplace soils have secondary calcium carbonates.
Melling soils are derived from intermediate and basic igneous rocks.
Pernog soils have a particle size control section dominated by stones.
Pernty soils are derived from volcanic rocks such as rhyolite or metamorphic rocks such as chert.
Rozara,
Shalper,
Slatter and
Tweener soils are less than 36 cm to bedrock. In addition, Rozara soils contain less than 18 percent clay and Tweener soils have control sections dominated by cobbles and stones.
Shalcleav soils are 10 to 30 cm deep to a lithic contact.
Tractuff soils are moist for 10 to 20 days cumulative due to convection storms between July and October and have 18 to 27 percent clay in the control section.
GEOGRAPHIC SETTING: Grandeposit soils are on backslopes of mountains.
These soils formed in colluvium over residuum from quartzite and slate. Slopes are 15 to 50 percent.
Elevations are 2,010 to 2,500 meters. The climate is dry-subhumid with cool moist winters and warm dry summers. The mean annual precipitation is 400 to 500 mm. The mean annual temperature is 4 to 6 degrees C. The frost-free period is 40 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Checkett,
Grube, and the competing
Majorsplace series.
Checkett soils have a mean annual soil temperature of 8.3 to 11.7 degrees
Grube soils are very deep and have identifiable secondary calcium carbonate at 50 to 76 cm and the mollic epipedon is 25 to 38 cm thick.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; medium or high runoff; moderately low or moderately high saturated hydraulic conductivity.
USE AND VEGETATION: Grandeposit soils are used for livestock grazing and wildlife habitat. The potential native vegetation is mainly, Indian ricegrass, bluebunch wheatgrass, black sagebrush, and old singleleaf pinyon. This site is correlated to Ecological Site F28BY076NV, PIMO/ARTRV/PSSPS-POFE
DISTRIBUTION AND EXTENT: East central Nevada. These soils are not extensive. MLRA 28B.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: White Pine County, Humboldt-Toiyabe National Forest, South Part, Nevada, 2013. The name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 18 cm (A1 and A2 horizons).
Argillic horizon - The zone from 18 to 48 cm (Bt1 and Bt2 horizons).
Lithic contact - The boundary at 48 cm (R layer).
Particle-size control section - The zone from 18 to 48 cm (Bt1 and Bt2 horizons).
ADDITIONAL DATA:
User Pedon ID - 08NV778076-CWL
National Cooperative Soil Survey
U.S.A.