LOCATION MONGER                  NV

Established Series
Rev. DJM/ET
11/2015

MONGER SERIES

The Monger series consists of deep to soft bedrock, well drained soils that formed in residuum from sandstone with a thin mantle of alluvium from limestone. Monger soils are on erosional stream terraces. Slopes are from 2 to 15 percent. The mean annual precipitation is about 5 inches. The mean annual temperature is about 68 degrees F.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, thermic Petronodic Haplocalcids

TYPICAL PEDON: Monger gravelly loamy fine sand - rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is covered with 32 percent gravels.

A--0 to 3 inches; light brown (7.5YR 6/4) gravelly loamy fine sand, brown (7.5YR 5/4) moist; strong coarse platy structure; soft, very friable, nonsticky and nonplastic; few very fine and fine roots; many very fine and fine interstitial pores; 19 percent pebbles; 11 percent calcium carbonate equivalent; strongly effervescent; moderately alkaline (pH 8.4); clear smooth boundary. (2 to 4 inches thick)

Bk1--3 to 10 inches; light brown (7.5YR 6/4) fine sandy loam, brown (7.5YR 5/4) moist; common fine and medium subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; common fine and medium roots; many very fine and fine interstitial, few fine tubular pores; secondary calcium carbonate segregated few (3 percent) fine faint carbonate coatings on the sides and bottom surfaces of rock fragments; 12 percent pebbles; 15 percent calcium carbonate equivalent in the fine earth fraction; violently effervescent; strongly alkaline (pH 8.6); clear wavy boundary. (0 to 10 inches thick)

Bk2--10 to 18 inches; pink (7.5YR 7/4) gravelly fine sandy loam, brown (7.5YR 5/4) moist; moderate coarse and medium subangular blocky structure; slightly hard, very friable, slightly sticky and nonplastic; few fine roots; many very fine and fine interstitial, few fine tubular pores; secondary calcium carbonate segregated as many moderately thick calcium carbonate pendants oriented on the bottom surfaces of rock fragments and many (30 percent), coarse, distinct, pinkish white (7.5YR 8/2) weakly cemented calcium carbonate nodules in the matrix; 26 percent pebbles; 20 percent calcium carbonate equivalent in the fine earth fraction; violently effervescent; moderately alkaline (pH 8.4); clear wavy boundary. (6 to 10 inches thick)

Bk3--18 to 41 inches; pink (7.5YR 7/4) gravelly fine sandy loam, light brown (7.5YR 6/4) moist; massive; slightly hard, friable, slightly sticky, nonplastic; few fine roots; many very fine and fine interstitial, few fine tubular pores; secondary calcium carbonate segregated as common (9 percent) medium distinct irregular weakly cemented nodules in matrix and many medium distinct calcium carbonate pendants on bottom surfaces of rock fragments; 24 percent calcium carbonate equivalent in the fine earth fraction; 31 percent pebbles; violently effervescent; strongly alkaline (pH 8.6); gradual wavy boundary. (20 to 30 inches thick)

Bk4--41 to 55 inches; pink (7.5YR 7/4) gravelly loamy fine sand, light brown (7.5YR 6/4) moist; massive; soft, very friable, nonsticky, nonplastic; few fine roots; many very fine and fine interstitial, few fine tubular pores; secondary calcium carbonate segregated common (5 percent) medium, distinct, white (7.5YR 8/1) irregular weakly cemented nodules in matrix and many medium distinct calcium carbonate pendants on bottom surfaces of rock fragments; 10 percent calcium carbonate equivalent in the fine earth fraction; 15 percent pebbles; violently effervescent; strongly alkaline (pH 8.6); abrupt wavy boundary. (8 to 12 inches thick)

2Cr--55 to 66 inches; reddish yellow (7.5YR 7/6) weathered bedrock, strong brown (7.5YR 5/6) moist; massive; variable stratified lacustrine sediments of the Muddy Creek formation; violently effervescent; moderately alkaline (pH 8.4).

TYPE LOCATION: Northeastern Clark County, Nevada; approximately 1/2 mile east of the Halfway Wash Road, along a power line access road; 3,541 feet north and 178 feet east of the southwest corner of section 32, T. 14 S., R. 69 E.; USGS Overton N.E., 7.5 minute topographic quadrangle; 36 degrees 40 minutes 33 seconds north latitude and 114 degrees 18 minutes 40 second west longitude, NAD 83; 11S, 740284, 4062282, NAS-C.

RANGE IN CHARACTERISTICS:

Soil moisture - Usually dry, moist in some part for short periods during winter and early spring and for brief periods between July and October following convection storms; typic aridic moisture regime.

Mean annual soil temperature 65 to 71 degrees F.

Depth to paralithic horizon - Ranges from 40 to 60 inches.

Reaction - moderately alkaline or strongly alkaline.

Particle-size control section - Clay content: 8 to 18 percent; Rock fragments: 10 to 35 percent predominately pebbles. Lithology of fragments is dominantly sedimentary rocks composed of limestone and dolomitic limestone with small amounts of sandstone.

A horizon - Value: 4 through 6 dry, 4 or 5 moist.

Chroma: 4 to 6 dry and 6 moist.

Bk horizons - Hue 10YR, 7.5YR or 5YR.

Value: 5 or 6 dry, 4 or 5 moist.

Chroma: 4 through 6 dry, 6 moist.

Texture: Fine sandy loam or sandy loam; loamy fine sand is in the lower part of most pedons.

Rock fragments: 10 to 35 percent pebbles.

Salinity (EC): 0 to 2 mmhos/cm.

Calcium carbonate equivalent: 10 to 25 percent in the less than 2 millimeter fraction.

Other features: Subhorizons with a combined thickness of 15 cm or more have 20 to 40 percent medium and coarse carbonate nodules in matrix and many moderately to thick carbonate pendants on undersides of rock fragments.

2Cr horizon highly variable strata derived from Tertiary sediments, ranging from clay to fine sands, (Muddy Creek formation).

COMPETING SERIES: These are the Latene, Lavic and Wink series. Latene soils have calcic horizons that occur below 9 inches and have a soil moisture regime more typical of the Sonoran desert. Lavic and Wink soils have calcic horizons that occur below 20 inches.

GEOGRAPHIC SETTING: Monger soils are on erosional stream terraces. The typically occur on stream terrace summits and formed in residuum derived from Tertiary sediments (Muddy Creek Formation). Slopes are from 2 to 15 percent. Elevations range from 1,400 to 2,200 feet. The climate is arid with warm, moist winters and hot, dry summers. The mean annual precipitation is about 5 to 7 inches, mean annual temperature is about 66 to 68 degrees F., and the frost-free period is 180 to 300 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Arizo, Bard and, Bluepoint series. Arizo soils do not have calcic horizons and have a sandy-skeletal control section. Bard soils have an indurated petrocalcic horizon and a loamy particle size control section. Bluepoint soils lack calcic horizons and have sandy particle-size control sections.

DRAINAGE AND PERMEABILITY: Well drained; low runoff; moderately rapid permeability; saturated hydraulic conductivity class is high.

USE AND VEGETATION: Rangeland and recreation use. The present vegetation is mainly white ratney, white bursage, creosotebush, turks head, Joshua tree, and barrel cactus and cholla.

DISTRIBUTION AND EXTENT: Southern Nevada. These soils are not extensive. MLRA 30.

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

SERIES PROPOSED: Clark County, Nevada, 2004. The name is coined.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - The zone from about 0 to 3 inches. (A horizon)

Calcic horizon - The zone from about 7 to 55 inches. (Bk horizons)

Particle-size control section - The zone from 10 to 40 inches (The Bk2 and Bk3 horizon).

Responsibility for this series was transferred from Davis to Phoenix 11/2015. The last revision to the series was 3/2007. ET

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National Cooperative Soil Survey
U.S.A.