LOCATION EAGLEROCK NV
Established Series
Rev. TEB/DLJ/RLB/JBF
05/2016
EAGLEROCK SERIES
The Eaglerock series consists of moderately deep, well drained soils that formed in residuum and colluvium derived from granitic rocks. The Eaglerock soils are on concave mountain side slopes. Slopes are 15 to 50 percent. The mean annual precipitation is about 300 mm and the mean annual temperature is about 8 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Aridic Argixerolls
TYPICAL PEDON: Eaglerock gravelly coarse sandy loam, 30 to 50 percent slopes, extremely bouldery, rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is partially covered with 25 percent gravel, 15 percent cobbles and 15 percent boulders.
A1--0 to 5 cm; grayish brown (10YR 5/2) gravelly coarse sandy loam, very dark grayish brown (10YR 3/2) moist; moderate thin platy structure; slightly hard, very friable, nonsticky and slightly plastic; common very fine roots; many very fine vesicular and common very fine tubular pores; 20 percent gravel; neutral (pH 7.0); clear smooth boundary. (3 to 10 cm thick)
A2--5 to 13 cm; grayish brown (10YR 5/2) sandy loam, very dark grayish brown (10YR 3/2) moist; weak very thin platy structure; soft, very friable, slightly sticky and slightly plastic; many very fine, few fine and medium roots; many very fine tubular pores; 12 percent gravel; neutral (pH 7.0); clear smooth boundary. (5 to 13 cm thick)
Bt1--13 to 30 cm; grayish brown (10YR 5/2) very gravelly loam, dark brown (10YR 3/3) moist; weak fine and medium subangular blocky structure; slightly hard, very friable, sticky and plastic; many very fine, few fine and medium roots; many very fine tubular pores; few thin clay films lining pores and bridging sand grains; 35 percent gravel, 3 percent cobbles; neutral (pH 7.0); gradual smooth boundary. (13 to 30 cm thick)
Bt2--30 to 48 cm; grayish brown (10YR 5/2) very gravelly sandy clay loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; slightly hard, very friable, sticky and plastic; common very fine, few fine and medium roots; common very fine tubular pores; few thin clay films lining pores and bridging sand grains; 40 percent gravel, 5 percent cobbles; neutral (pH 6.8); abrupt smooth boundary. (10 to 25 cm thick)
Bt3--48 to 79 cm; yellowish brown (10YR 5/4) very gravelly sandy clay loam, brown (10YR 4/3) moist; moderate fine subangular blocky structure; slightly hard, very friable, sticky and plastic; common very fine, few fine and medium roots; common very fine tubular pores; few thin clay films lining pores and bridging sand grains; 40 percent gravel, 3 percent cobbles; neutral (pH 6.8); abrupt wavy boundary. (0 to 38 cm thick)
2Cr--79 to 152 cm; soft, weathered granitic grus with few very fine roots along weak fractures.
TYPE LOCATION: Pershing County, Nevada, approximately 40 miles northwest of Lovelock near the lava beds in an unsurveyed area about 13,300 feet north and 1,400 feet east of the northwest corner of section 5, T. 30 N., R. 27 E., 40 degrees, latitude 32 minutes, 15.8 seconds N and longitude 118 degrees, 58 minutes, 47.7 seconds W; WGS84 Decimal Degrees 40.5377222 latitude, -118.979917 longitude.
RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring, dry from June through October; aridic soil moisture regime bordering on xeric.
Mean annual soil temperature: 8 to 10 degrees C.
Mollic epipedon thickness: 30 to 50 cm and includes the upper part of the argillic horizon.
Depth to the paralithic contact: 50 to 100 cm.
Reaction: Slightly acid or neutral.
Particle-size control section - Clay content: 18 to 27 percent.
Rock fragments: 35 to 50 percent, mainly fine gravel.
A and AB horizon (when present)
Value: 4 or 5 dry.
Chroma: 2 or 3.
Bt horizons
Hue: 10YR or 7.5YR.
Value: 4 through 6 dry, 3 or 4 moist.
Chroma: 2 through 4.
Texture: Very gravelly loam, very gravelly sandy loam, very gravelly sandy clay loam.
Consistence: Slightly hard or hard dry, very friable or friable moist; slightly sticky or sticky and slightly plastic or plastic, wet.
COMPETING SERIES: These are the
Ashue,
Badena,
Badenaugh,
Gitabyte,
Grinrod,
Ister,
Lemm,
Leviathan,
Nosrac ,
Oest,
Searles,
Searvar,
Shawmount,
Shree,
Shroe,
Tollgate,
Trid and
Tristan series.
Ashue,
Badena,
Badenaugh,
Lemm,
Leviathan,
Nosrac,
Oest,
Shawmount,
Shree,
Shroe and
Tollgate soils do not have bedrock within 100 cm.
Gitabyte,
Grinrod,
Ister,
Searles soils have a lithic contact at 50 to 100 cm.
Searvar soils have rock fragments consisting mainly of cobble size.
Trid soils have a mollic epipedon that is 20 to 30 cm thick and 55 to 75 percent rock fragments in the argillic horizon.
Tristan soils are 100 to 150 cm to bedrock.
GEOGRAPHIC SETTING: Eaglerock soils are on concave mountain side slopes. These soils formed in residuum and colluvium derived from granitic rocks. Slopes are 15 to 50 percent. Elevations are 1,460 to 2,380 meters. The climate is cool, semiarid with cool, moist winters and warm, dry summers. The mean annual precipitation is 250 to 350 mm; mean annual temperature is 7 to 9 degrees C, and the frost-free season is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Acrelane,
Arclay and
Say soils. Acrelane and Arclay soils are shallow to a paralithic contact. Say soils are fine-loamy.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; rapid runoff; moderately low saturated hydraulic conductivity.
USE AND VEGETATION: Rangeland and wildlife habitat. The present vegetation is mainly mountain big sagebrush, green ephedra, arrowleaf balsamroot and gooseberry currant.
DISTRIBUTION AND EXTENT: Northwestern Nevada. MLRA 27, 23. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Davis, California
SERIES ESTABLISHED: Pershing County, Nevada, West Part, 1988.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - The zone from the soil surface 0 to 48 cm (A1, A2, Bt1 and Bt2 horizons).
Argillic horizon - The zone from 13 to 79 cm (Bt1, Bt2 and Bt3 horizons).
Pralithic contact - The boundary at 79 cm (2Cr layer).
Aridic feature - Aridic soil moisture regime bordering on xeric.
Particle-size control section - The zone from 13 to 63 cm (Bt1, Bt2 and part of the Bt3 horizons).
ADDITIONAL DATA: NASIS pedon and site ID 07NV761Y019jbf.
National Cooperative Soil Survey
U.S.A.