From the Soil Micromorphology Slide Collection

Data for the horizon Horizon sampled: Bk2 Depth sampled: 60-85 cm
Soil climate data: MA precipitation = 8 cm, aridic moisture regime; MAT = 23°C, hyperthermic temp. regime
Physical and chemical description: Clay = 7.7%, silt = 9.5%, sand = 82.8%, coarse fraction
3%, QC = 0.07%, bulk density = 1.55 Mg m-3 CaC03 = 17%, pH = 8.5
Clay mineralogy: Palygorskite moderate; montmorillonite, kaolinite, calcite in trace amounts Macromorphological description of horizon: Light yellowish brown (1OYR 6/4) sandy loam,
yellowish brown (1OYR 5/4) moist; massive; slightly hard, very friable, slightly sticky and nonplastic; common medium lime nodules; violently effervescent
Micromorphological description of horizon: Gefuric related distribution pattern (Bullock et al., 1985); crystic plasmic fabric (Brewer, 1976)

Data for thin section:
Preparation of sample: Air dry
Thickness of section: 30 µm
Size of section: 25x40 mm

Soil Classification
U.S.: Sandy, mixed, hyperthermic Typic Calciorthid

Elevation: 162 m
Physiographic position: Stream terrace Topography and hill slope position: Dune Parent Material: Eolian sand
Vegetation: Creosotebush, turkshead, big galleta

Data for 35-mm slide
Frame length: 1 mm
Light mode: Plane polarized (RDP5); cross polarized (RDP6)

Herriman, R. C. and D. M. Hendricks. 1984. Geomorphic Surfaces and Soils, Colorado River Area, Arizona. Guidebook, Soil-Geomorphology Field Conference, Soil Science Society of America, 76th Annual Meeting, Las Vegas, Nevada, November 30, 1984. USDA-SCS in Cooperation with AES-U of A.
Source - W.D. Nettleton

Slides RDP5 and RDP6. Soil Science Society of America, 1993. A Reference Slide Collection for Soil Micromorphology. SSSA, Madison, WI.