LOCATION LAVIC CA
Established Series
Rev. GAW/JWF/JJJ/ARW/KJO
09/2015
LAVIC SERIES
The Lavic series consists of very deep, moderately well drained soils that formed in mixed alluvium dominantly from granitic sources. Lavic soils are on fan piedmonts, alluvial fans and basin rim positions and have slopes of 0 to 5 percent. The mean annual precipitation is about 4 inches and the mean annual temperature is about 63 degrees F.
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, thermic Petronodic Haplocalcids
TYPICAL PEDON: Lavic loamy fine sand, on a 1 percent slope under creosotebush, Mormon-tea, and Indian ricegrass at 2,820 feet elevation. (Colors are for dry soil unless otherwise stated. When described the soil was dry throughout.)
A--0 to 10 inches; pale brown (10YR 6/3) loamy fine sand, dark brown (10YR 4/3) moist; weak medium and coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine roots; common very fine interstitial pores; strongly effervescent, carbonates disseminated; moderately alkaline (pH 8.0); clear wavy boundary. (5 to 10 inches thick)
Bw--10 to 20 inches; brown (7.5YR 5/4) loamy sand, dark brown (7.5YR 4/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many very fine roots; many very fine interstitial pores; strongly effervescent, carbonates disseminated and segregated in few medium irregular shaped white concretions; moderately alkaline (pH 8.0); abrupt wavy boundary. (10 to 20 inches thick)
Bk1--20 to 31 inches; light gray (2.5YR 7/2) loam, grayish brown (2.5Y 5/2) moist; massive; very hard, friable, slightly sticky and slightly plastic; weakly cemented with lime and discontinuous; few very fine and medium roots; few very fine interstitial pores; violently effervescent, carbonates disseminated and segregated as about 20 percent by volume, hard, irregular shaped (1/2 to 3/4 inch) white concretions and large soft masses; moderately alkaline (pH 8.0); clear wavy boundary. (10 to 20 inches thick)
Bk2--31 to 40 inches; pale brown (10YR 6/3) sandy loam, dark brown (10YR 4/3) moist; massive; hard, very friable, slightly sticky and slightly plastic; few very fine roots; common very fine interstitial pores; matrix noncalcareous; carbonates segregated in few fine rounded violently effervescent soft masses; moderately alkaline (pH 8.0); clear wavy boundary. (0 to 20 inches thick)
Bk3--40 to 49 inches; white (10YR 8/2) loam with about 20 percent of matrix light olive brown (2.5Y 5/4); light gray (10YR 7/2) and grayish brown (2.5Y 5/2) moist; massive; very hard, friable, slightly sticky and slightly plastic; few very fine interstitial pores; matrix noncalcareous; about 10 to 15 percent by volume is segregated carbonates in large white violently effervescent irregular shaped soft masses; moderately alkaline (pH 8.0); clear smooth boundary. (0 to 10 inches thick)
2Bk4--49 to 60 inches; light yellowish brown (10YR 6/4) loamy sand, yellowish brown (10YR 5/4) moist; massive; hard, very friable, nonsticky and nonplastic; many very fine interstitial, few fine tubular pores; matrix noncalcareous; carbonates segregated in few medium irregular shaped slightly effervescent soft masses; moderately alkaline (8.0).
TYPE LOCATION: San Bernardino County, California; 3 miles west of Adelanto on the El Mirage Road about 50 feet SW of the road; NE1/4 NE1/4 NE1/4 section 24, T.6 N., R.6 W., SBBM; Latitude 34 degrees, 36 minutes, 13 seconds north and Longitude 117 degrees, 27 minutes, 15 seconds west; Adelanto Quadrangle.
RANGE IN CHARACTERISTICS: Depth to a calcic horizon is 20 to 30 inches and calcium carbonate equivalent ranges from 15 to 30 percent. Depth to stratification is 40 to 59 inches. The mean annual temperature at depth of about 20 inches is about 65 degrees F. and the temperature usually is not below 47 degrees F. at any time. The soil from 11 to 29 inches is usually dry and is not continuously moist for as long as 60 days. The control section averages sandy loam or loam with 8 to 18 percent clay and less than 30 percent fine or very fine sand.
The A horizon is 10YR 6/3, 7/3, 7/4 dry; 10YR 4/3, 5/3, 5/4 moist. It is loamy sand or loamy fine sand and has about 5 to 10 percent fine gravel. Structure ranges from weak to moderate, fine to coarse, subangular blocky or platy. Reaction is typically moderately alkaline but ranges to slightly alkaline. This horizon is generally strongly effervescent, carbonates disseminated but small areas are slightly effervescent.
The Bw horizon is 7.5YR 5/4 and 10YR 6/3, 6/4, 7/3, 7/4, 8/2, 8/3 dry; 7.5YR 4/4 and 10YR 4/2, 4/4, 5/3, 5/4, 6/2, 6/3 moist. Texture is loamy sand or loamy fine sand with 4 to 8 percent clay.
The Bk horizon is 2.5Y 7/2, 5/4 and 10YR 6/3, 6/4, 7/2, 7/3, 8/2, 8/4 dry; 2.5Y 5/2, 5/4, 6/2, 6/4, 7/2, 7/4 and 10YR 4/3, 5/2, 5/3, 5/4, 6/2, 6/3, 7/4, 7/6 moist. Texture is loam or sandy loam with 5 to 10 percent fine gravel by weighted average. There are 20 to 30 percent lime nodules or concretions. Most pedons are weakly cemented in some part of the calcic horizon but cementation is not continuous. Other pedons are hard or very hard but soften appreciably upon wetting.
The 2Bk horizon has similar colors as the Bk horizons but lacks concretions and nodules. Textures are stratified loamy sand to sand with 5 to 10 percent gravels and 0 to 7 percent clay.
COMPETING SERIES: These are the
Algerita (NM),
Grapevine (NV),
Kinley (AZ),
Latene (NM),
Nikey (UT),
Rillino (AZ),
Whitlock (AZ) and
Wink (TX) series. Algerita soils have a moisture control section that is moist for 30 to 40 days cumulative in July, August and September. Grapevine soils have a prismatic B2 horizon and a calcic horizon at depths of 5 to 10 inches and have gypsum in the substratum. Kinley soils are intermittently moist during the summer. Latene soils have a calcic horizon at a depth of less than 20 inches and have more than 30 percent fine or very fine sand. Nikey soils dominantly have hue of 5YR throughout. Rillino soils have 20 to 35 percent rock fragments in the control section. Whitlock soils have sand or loamy sand in the lower part of their control section. Wink soils are strongly cemented in the C horizon.
GEOGRAPHIC SETTING: Lavic soils are on fan piedmonts, alluvial fans and basin rims and have slopes of 0 to 9 percent. They formed in mixed alluvium derived mainly from granitic sources. Elevations are 2,400 to 3,200 feet. The climate is arid with hot, dry summers and cool somewhat moist winters. The mean annual precipitation is 4 or 5 inches, most of the moisture occurring as rain in late autumn and winter. Some moisture falls occasionally as snow. The mean annual temperature is 61 to 63 degrees F; the average January temperature is about 44 degrees F.; and the average July temperature is about 83 degrees F. The frost free season is 190 to 255 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Bryman,
Cajon,
Kimberlina,
Norob and
Peterman series. Bryman soils have a fine-loamy argillic horizon. Cajon soils have a sandy particle-size control section and lack a B horizon. Kimberlina soils lack a calcic horizon. Norob soils have a fine-loamy natric horizon. Peterman soils have a fine particle-size control section and lack a B horizon.
DRAINAGE AND PERMEABILITY: Well drained; very low to medium runoff; moderate permeability.
USE AND VEGETATION: They are used for military operations, homesites and for wildlife habitat. Small acreages are used for irrigated alfalfa, small grain and pasture. Natural vegetation is creosotebush, white bursage, Joshua tree, Indian ricegrass, annual forbs and grasses.
DISTRIBUTION AND EXTENT: Mojave Desert, California. The soils are not extensive. MLRA 30.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: PHOENIX, ARIZONA
SERIES ESTABLISHED: San Bernardino County, California, Mojave River Area, 1978.
REMARKS: Runoff classes based on Ksat and slope as described in "Terminology Used in Soil Survey Data Entry or Manuscript Editing of: 9-23-94 MAV." Runoff changed from slow to very low to medium.
Responsibility for this series was transferred from Davis to Phoenix 9/2015. The last revision to the series was 2/1997. ET
National Cooperative Soil Survey
U.S.A.