LOCATION EGANROC                 NV

Established Series
Rev. PWB-WED-RLB-JVC
11/2016

EGANROC SERIES

The Eganroc series consists of moderately deep, well drained soils that formed in residuum and colluvium derived from limestone and dolomite. Eganroc soils are on mountains. Slopes are 30 to 75 percent. The mean annual precipitation is about 760 mm and the mean annual temperature is about 5 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Calcic Pachic Haplocryolls

TYPICAL PEDON: Eganroc very stony loam--forestland. (Colors are for dry soil unless otherwise noted). The soil surface is partially covered with approximately 30 percent gravel, 30 percent cobbles, and 15 percent stones.

A1--0 to 5 cm; grayish brown (10YR 5/2) very stony loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine roots; many very fine tubular and interstitial pores; 30 percent gravel, 10 percent cobbles, and 15 percent stones; slightly alkaline (pH 7.8); abrupt smooth boundary. (3 to 13 cm thick)

A2--5 to 13 cm; grayish brown (10YR 5/2) very gravelly loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and few fine and medium roots; many very fine tubular pores; common faint secondary calcium carbonate concretions on bottoms of rock fragments; 45 percent gravel; slightly alkaline (pH 7.8); clear smooth boundary. (5 to 20 cm thick)

A3--13 to 23 cm; grayish brown (10YR 5/2) very gravelly loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, moderately sticky and moderately plastic; many very fine and few fine, medium, and coarse roots; many very fine tubular and interstitial pores; common faint secondary calcium carbonate concretions on bottom of rock fragments; 40 percent gravel and 10 percent cobbles; slightly alkaline (pH 7.8); gradual smooth boundary. (0 to 15 cm thick)

2Bk1--23 to 56 cm; grayish brown (10YR 5/2) extremely gravelly loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine and common fine, medium, and coarse roots; many very fine interstitial pores; many distinct secondary calcium carbonate concretions on bottom of rock fragments; 65 percent gravel and 5 percent cobbles; slightly effervescent; slightly alkaline (pH 7.8); clear wavy boundary. (15 to 41 cm thick)

2Bk2--56 to 86 cm; brown (10YR 5/3) extremely gravelly loam, dark grayish brown (10YR 4/2) moist; moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine, and common fine, medium, and coarse roots; many very fine tubular pores; many distinct secondary calcium carbonate concretions on bottom of rock fragments with common distinct secondary calcium carbonate pendants; 65 percent gravel and 10 percent cobbles; slightly effervescent; moderately alkaline (pH 8.0); abrupt irregular boundary. (15 to 41 cm thick)

3R--86 cm; dolomite bedrock; slightly effervescent.

TYPE LOCATION: White Pine County, Nevada; about 4 miles north-northwest of Cherry Creek; approximately 1,300 feet east and 1,300 feet north of the southwest corner of section 7, T. 24 N., R. 63 E.; USGS Cherry Creek 7.5 minute topographic quadrangle; latitude 39 degrees 57 minutes 37.8 seconds N and longitude 114 degrees 53 minutes 51.1 seconds W; WGS84 Decimal Degrees 39.9605000 latitude, -114.8975278 longitude.

RANGE IN CHARACTERISTICS:
Soil moisture: Usually moist, moist late fall through early summer, dry mid-summer through early fall; xeric soil moisture regime.
Mean annual soil temperature: 5 to 7 degrees C.
Mean summer soil temperature: 12 to 15 degrees C.
Mollic epipedon thickness: 40 to 64 cm; includes upper part of 2Bk horizon in some pedons.
Depth to calcic horizon: 23 to 38 cm.
Depth to bedrock: 76 to 100 cm to a lithic contact.

Particle-size control section - Clay content: 16 to 27 percent.
Rock fragments: 35 to 70 percent, including 5 to 15 percent cobbles.

A horizons
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Calcium carbonate equivalent: 0 to 2 percent.

2Bk1 horizon
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3, dry or moist.
Structure: Subangular blocky or massive.
Texture: Very gravelly loam, extremely gravelly loam.
Reaction: Slightly alkaline or moderately alkaline.
Consistence: Soft or slightly hard.
Calcium carbonate equivalent: 15 to 25 percent.

2Bk2 horizon
Value: 5 or 6 dry, 4 or 5 moist.
Chroma: 2 or 3, dry or moist.
Structure: Subangular blocky or massive.
Texture: Very gravelly loam, extremely gravelly loam.
Consistence: Soft or slightly hard.
Reaction: Slightly alkaline or moderately alkaline.
Calcium carbonate equivalent: 15 to 25 percent.

COMPETING SERIES: These are the Firading, Levengood, Meegernot, Polumar, Raynoldson, Spearhead, and Stoneman series.

Firading soils have a Bw horizon and lack a discontinuity above the calcic horizon. Levengood, Meegernot, Spearhead, and Stoneman soils are greater than 150 cm deep to bedrock. Polumar soils have a lithic contact at depths of 100 to 150 cm. Raynoldson soils have 4 to 12 percent clay in the particle-size control section.

GEOGRAPHIC SETTING: Eganroc soils are on mountains. They typically occur on backslope and footslope positions. These soils formed in residuum and colluvium from limestone and dolomite. Slopes are 30 to 75 percent. Elevations are 2,430 to 3,110 meters. The climate is semi-arid with cold, wet winters and cool, dry summers. The mean annual precipitation is 600 to 900 mm, the mean annual temperature is 4 to 6 degrees C, and the frost-free period is 50 to 70 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hardzem, Haunchee and Hyzen soils. Haunchee and Hyzen soils are less than 50 cm deep to a lithic contact. Hardzem soils have argillic horizons and ochric epipedons.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: Eganroc soils are used for woodland and wildlife habitat. The present vegetation is mainly white fir and bristlecone pine.

DISTRIBUTION AND EXTENT: East-central Nevada. These soils are moderately extensive. MLRAs 28B, 28A, and 29.

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

SERIES ESTABLISHED: White Pine County, Nevada, West Part, 1990.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface to 56 cm (A1, A2, A3, and 2Bk1 horizons).
Calcic horizon - The zone from 23 to 86 cm (2Bk1 and 2Bk2 horizons).
Lithic contact - The boundary at 86 cm to underlying, hard, unweathered bedrock (3R layer).
Particle-size control section - The zone from 25 to 86 cm (part of the 2Bk1 horizon and the 2Bk2 horizon).

---

National Cooperative Soil Survey
U.S.A.