LOCATION JADESTORM               CA

Established Series
Rev: CAH/PBF/ET
04/2015

JADESTORM SERIES

The Jadestorm series consists of very shallow and shallow, somewhat excessively drained soils that formed in residuum and colluvium from gneissic and granitoid rocks. Jadestorm soils are on hills and mountains. Slope ranges from 15 to 75 percent. The mean annual precipitation is about 100 millimeters (4 inches) and the mean annual air temperature is about 21.5 degrees C (71 degrees F).

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, calcareous, hyperthermic, shallow Typic Torriorthents

TYPICAL PEDON: Jadestorm cobbles, on a linear 32 percent slope under desert shrubs at an elevation of 655 meters (2,150 feet). (Colors are for dry soil unless otherwise noted.)

C -- 0 to 6 centimeters (0 to 2.5 inches) cobbles; 40 percent gravel, 30 percent cobbles, 5 percent stones and 1 percent boulders. (2 to 10 centimeters thick)

A -- 6 to 8 centimeters (2.5 to 3 inches); pale brown (10YR 6/3) very gravelly sandy loam, dark grayish brown (10YR 4/2) moist; weak thin platy structure; soft, very friable, slightly sticky and slightly plastic; common very fine roots; few fine tubular pores; 50 percent gravel and 5 percent cobbles; strongly effervescent; slightly alkaline (pH 7.6); clear wavy boundary. (2 to 11 centimeters thick)

Bw -- 8 to 25 centimeters (3 to 10 inches); pale brown (10YR 6/3) very gravelly sandy loam, brown (10YR 4/3) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; many very fine and fine, common medium roots; few fine tubular pores; 50 percent gravel and 5 percent cobbles; strongly effervescent; moderately alkaline (pH 8.2); abrupt irregular boundary. (3 to 25 centimeters thick)

Cr -- 25 to 42 centimeters (10 to 16 inches); weathered gneissic bedrock material; gradual irregular boundary. (5 to 17 centimeters thick)

R -- 42 centimeters (16 inches); unweathered, fractured gneissic bedrock material of high to very high excavation difficulty.

TYPE LOCATION: Riverside County, California; 3 kilometers east and 1 kilometer south of the SE corner of sec. 35, T. 4 S., R. 13 E., San Bernardino Base and Meridian; 33 degrees, 54 minutes and 45 seconds north latitude and 115 degrees, 38 minutes and 57 seconds west longitude; USGS Conejo Well 7.5 minute topographic quadrangle; UTM 11S 624980e 3745877n (DTM: NAD83).

RANGE IN CHARACTERISTICS:

Soil moisture control section: usually dry, moist in some parts for short
periods during winter and early spring and for 10 to 20 days cumulative
between July and September following convection storms. The soils have a
typic-aridic soil moisture regime.

Soil temperature: 22 to 25 degrees C (72 to 77 degrees F).
Surface rock fragments: 80 to 95 percent; with 5 to 20 percent fine gravel,
40 to 70 percent medium and coarse gravel, 10 to 45 percent cobbles, 0 to
12 percent stones and 0 to 5 percent boulders.
Organic matter: 0 to 0.5 percent.
Depth to a paralithic contact: 10 to 36 centimeters.
Depth to a lithic contact: 15 to 65 centimeters.

C horizon
80 to 95 percent; with 5 to 20 percent fine gravel, 40 to 70 percent medium and coarse gravel, 10 to 45 percent cobbles, 0 to 12 percent stones and 0 to 5 percent boulders.

A horizon
Value: 5 or 6 dry, and 3 to 5 moist.
Chroma: 2 to 4, dry or moist.
Texture of the fine earth: loamy sand or sandy loam.
Clay content: 4 to 12 percent.
Rock fragments: 25 to 70 percent; with 25 to 60 percent gravel, 0 to 15
percent cobbles, and 0 to 2 percent stones.
Effervescence: slightly to violently effervescent.
Reaction: neutral to moderately alkaline.

Bw or Bk horizon
Value: 5 or 6 dry, and 3 to 5 moist.
Chroma: 3 or 4 dry, and 2 to 6 moist.
Texture of the fine earth: sandy loam or loam.
Clay content: 6 to 16 percent.
Rock fragments: 35 to 75 percent, 0 to 60 percent gravel, 0 to 30 percent cobbles and 0 to 2 percent stones.
Effervescence: strongly or violently effervescent.
Reaction: slightly or moderately alkaline.

COMPETING SERIES: These are the Ramshead (NV), Schenco (AZ) and Stormjade (CA) series. Ramshead soils are formed from sedimentary rocks and have flagstones and channers in the profile. Schenco soils are dominated by channers and have schist lithology. Stormjade soils do not receive appreciable summer precipitation, are generally dry throughout the moisture control section for most of the year and have mean annual soil temperatures (MAST) from 25 to 28 degrees C (77 to 82 degrees F).

GEOGRAPHIC SETTING: Jadestorm soils are on hills and mountains. Slopes range from 15 to 75 percent. These soils formed in residuum and colluvium, from gneissic and granitoid rocks. Elevations range from 425 to 1128 meters (1,395 to 3,700 feet). The climate is arid with hot, dry summers and warm, moist winters. The mean annual precipitation is 75 to 125 millimeters (3 to 5 inches) and the mean annual air temperature is 20 to 23 degrees C (68 to 72 degrees F). The frost-free season is 300 to 340 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blackeagle and Meccapass soils. Blackeagle and Meccapass soils are on similar landscape positions and have diagnostic cambic horizons. Blackeagle soils have a lithic contact beginning between 36 and 50 centimeters below the mineral soil surface and Meccapass soils are moderately deep to a paralithic contact.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat excessively drained; very high runoff; high saturated hydraulic conductivity above the bedrock, moderately high saturated hydraulic conductivity in the upper part of the bedrock and low saturated hydraulic conductivity in the hard bedrock.

USE AND VEGETATION: Jadestorm soils are used for recreation and wildlife habitat. The present vegetation is mainly creosote bush, brittlebush, and burrobush.

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

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA

SERIES ESTABLISHED: Riverside County, California; Soil Survey of Joshua Tree National Park, California, 2012. The name is from a local feature in the soil survey area.

REMARKS: Diagnostic horizons and features in this pedon include:

C horizon - from a depth of 0 to 6 centimeters.
Ochric epipedon - from a depth of 6 to 24 centimeters (A and part of the Bw
horizon).
Paralithic contact - the zone beginning at 25 centimeters (Cr horizon).
Lithic contact - the zone beginning at 42 centimeters (R horizon).
Particle-size control section - from a depth of 0 to 25 centimeters (C, A and Bw horizons).

ADDITIONAL DATA: NASIS User Pedon ID: 794-DD-9.

Responsibility for this series was transferred from Davis to Phoenix 4/2015. The last revision to the series was 5/2012. ET

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National Cooperative Soil Survey
U.S.A.