LOCATION QUIJINUMP NV

Established Series
REV: LJL/CAH/ET
12/2015

QUIJINUMP SERIES

The Quijinump series consists of very deep, well drained soils that formed in alluvium derived from limestone. Quijinump soils are on fan aprons and inset fans. Slope ranges from 4 to 15 percent. The mean annual precipitation is about 200 millimeters and the mean annual temperature is about 13 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, carbonatic, mesic Typic Torriorthents

TYPICAL PEDON: Quijinump very gravelly fine sandy loam, rangeland and wildlife habitat. (Colors are for dry soil unless otherwise noted.) The soil surface is covered by approximately 65 percent gravel, 3 percent cobbles and 1 percent stones, and 15 percent black moss.

A--0 to 5 centimeters (0 to 2 inches); grayish brown (10YR 5/2), very gravelly fine sandy loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine roots; many very fine vesicular and few fine tubular pores; 50 percent gravel, 3 percent cobbles and 1 percent stones; violently effervescent (50 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.2); clear smooth boundary. (3 to 6 centimeters thick)

Bk1--5 to 17 centimeters (2 to 7 inches); grayish brown (10YR 5/2), very gravelly fine sandy loam, dark brown (10YR 3/3) moist; moderate very coarse subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and few fine roots; common very fine and few fine tubular pores; 30 percent prominent, white (10YR 8/1), calcium carbonate coats on bottom surfaces of rock fragments; 45 percent gravel, 3 percent cobbles and 3 percent stones; violently effervescent (55 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.2); clear wavy boundary.

Bk2--17 to 49 centimeters (7 to 19 inches); pale brown (10YR 6/3), very gravelly sandy loam, brown (10YR 4/3) moist; moderate coarse subangular blocky structure; moderately hard, very friable, nonsticky and nonplastic; common very fine and fine, few medium and coarse roots; common very fine and few fine tubular pores; 30 percent prominent, white (10YR 8/1), calcium carbonate coats on bottom surfaces of rock fragments; 35 percent gravel, 3 percent cobbles and 5 percent stones; violently effervescent (65 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.4); abrupt wavy boundary.

Bkq--49 to 155 centimeters (19 to 61 inches); pale brown (10YR 6/3), stratified extremely gravelly sandy loam to extremely gravelly coarse sand, averages extremely gravelly sandy loam, brown (10YR 4/3) moist; massive; moderately hard, very friable, nonsticky and nonplastic; common very fine and few fine and medium roots; common very fine and few fine tubular, common very fine through coarse interstitial pores; 30 percent prominent, white (10YR 8/1), calcium carbonate coats on bottom surfaces of rock fragments; 1 percent distinct, light gray (10YR 7/2), silica coats on bottom surfaces of rock fragments; averages 65 percent gravel, 3 percent cobbles and 1 percent stones; violently effervescent (65 percent calcium carbonate equivalent in the fine earth fraction); moderately alkaline (pH 8.4). (The combined thickness of the B horizons is 145 to 155 centimeters.)

TYPE LOCATION: Clark County, Nevada; about 37 kilometers north and 15 kilometers east of Corn Creek, Nevada at the south end of Desert Valley; approximately 10 kilometers north-northeast of Quijinump Canyon; 480 feet north and 1050 feet west of the southeast corner of section 25, T. 13 S., R. 60 E.; USGS Mule Deer Ridge, NV 7.5 minute quadrangle; 36 degrees, 46 minutes, 7.2 seconds north latitude and 115 degrees, 11 minutes, 48.5 seconds west longitude; UTM 11S 0660933e 4070725n; (DTM: NAD83).

RANGE IN CHARACTERISTICS:

Soil moisture - usually dry, moist in some part for short periods during winter and early spring. The soils have a Typic-aridic moisture regime.

Soil temperature: 12 to 15 degrees C.

Calcium carbonate equivalence of the less than 20 millimeter fraction: 40 to 60 percent.

Control section -
Rock fragments: averages 50 to 75 percent, mainly gravel with 2 to 20 percent cobbles and stones.
Clay content: 6 to 12 percent.
Texture: Averages sandy loam, individual strata ranges from fine sandy loam to coarse sand.

A horizon
Value: 5 or 6 dry, 3 or 4 moist.
Chroma: 2 or 3 dry.
Calcium carbonate equivalence of the fine earth: 40 to 60 percent.

Bk and/or Bkq horizons
Texture: individual strata ranges from fine sandy loam to coarse sand.
Structure: weak or medium.
Consistence: very friable to moderately hard, nonsticky or slightly sticky.
Rock fragments: averages 50 to 75 percent, ranges 40 to 75 percent gravel, 2 to 20 percent cobbles and stones.
Calcium carbonate equivalence of the fine earth: 40 to 70 percent.
Sodium Adsorption Ratio: 0 to 5.
Electrical conductivity: 0 to 2 dS/m.

COMPETING SERIES: There are no competing series.

GEOGRAPHIC SETTING: Quijinump soils are on fan aprons and inset fans. Slope ranges from 4 to 15 percent. These soils formed in alluvium derived from limestone. Elevations are 1220 to 1830 meters. The climate is arid with warm, dry summers and cool, moist winters. The mean annual precipitation is 175 to 280 millimeters; mean annual air temperature is 11 to 14 degrees C., and the frost-free season is 130 to 180 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Purob and Wamp soils. Purob and Wamp soils occur on fan remnants and have strongly cemented to indurated petrocalcic horizons.

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

USE AND VEGETATION: These soils are used for rangeland and wildlife habitat. The present vegetation is mainly blackbrush, spiny menadora, banana yucca, Joshua tree, bush muhly and threeawn.

DISTRIBUTION AND EXTENT: Mojave Desert of southern Nevada, U.S.A.; MLRA 30. These soils are moderately extensive.

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

SERIES PROPOSED: Desert National Wildlife Refuge Area, Nevada, South Part; Clark County, Nevada 2009. The name is from Quijinump Canyon located 10 kilometers to the south-southwest in the Desert National Wildlife Refuge.

REMARKS: Diagnostic horizons and features recognized in the profile are:

Ochric epipedon - 0 to 18 centimeters (0 to 7 inches) (A, Bk1 and part of the Bk2 horizons).
Particle-size control section - 25 to 100 centimeters (10 to 40 inches) (Part of the Bk2 and Bkq horizons).

Responsibility for this series was transferred from Davis to Phoenix 12/2015. The last revision to the series was 6/2011. ET

National Cooperative Soil Survey
U.S.A.