Eutric Sodic Fluvisol (Loamic) - Neossolo Flúvico Sódico sálico; 3Cvn (1.55-1.75 m) |
Compose 30 % of the groundmass. Poorly selected, containing quartz (55 %), quartzite (5 %), feldspar (30 %), and other minerals (10 %). Subhedral grains (~90 %). Smooth sub-angular sub-elongated and subspherical. |
50 % of groundmass, grayish brow, compose of clays as kaolinite. Stipple-speckled b-factory (40 %). Presence of areas with undifferentiated b-factory. |
Angular blocky peds with porphyric distribution. Peds weakly developed, accommodated and with irregular surface, smooth near grains. |
Compose 20 %, of which: 10 % are channels, 30 % fissures, 25 % cavities, and 35 % chambers. |
Internal hypo-coating of aggregate and in the pores. Few areas with a coating of grains and aggregate, composed of iron oxides and clay. Nodules (1 %) typic, composed of iron and manganese and, or, quartz grains. |
Eutric Fluvic Planosol (Loamic) - Planossolo Háplico Eutrófico solódico; 2Btvnz (0.98-1.40 m) |
Compose 40 % of the groundmass. Well-selected and containing quartz (60 %), feldspar (30 %) and other minerals (10 %). Subhedral (60 %) and anedral (40 %) grains. Smooth sub-angular spherical and sub-spherical (~80 %). |
30 % of groundmass, olive-yellow, compose of clays as kaolinite and iron oxides (goethite). Predominance of stipple-speckled b-factory. |
Sub-angular blocky peds with porphyric distribution. Peds moderately (80 %) and weakly (20 %) developed, partially accommodated and with an irregular surface. |
Compose 30 % of which: 35 % are channels, 30 % fissures, 20 % cavities and 15 % chambers. |
Internal hypo-coating in the pores. Coating of pores, composed of iron oxides and clay. Pore filling with adherent materials, dense complete (80 %) and incomplete (20 %). Nodules (1 %) typic, composed of iron and manganese and, or quartz grains. Excrement features. |
Sodic Vertisol (Hypereutric) - Vertissolo Hidromórfico Sódico salino; Cvng (0.47-0.80 m) |
Compose 20 % of the groundmass. Poorly selected, containing quartz (45 %), quartzite (5 %), feldspar (30 %) and other minerals (10 %). Subhedral grains (~90 %). Smooth sub-angular sub-spherical (70 %). |
50 % of groundmass, light yellowish-brown, composed of clays as kaolinite and smectite. Stipple-speckled (70 %), pore-striated and grain-striated (30 %) b-factory. |
Angular blocky peds with porphyric distribution. Peds strongly developed, accommodated and with a predominance of smooth rounded and sub-angular surface. |
Compose 30 % of which: 65 % are fissures; 20 % chambers, cavities and channels sum 15 %. |
Hypo-coating of aggregate and in the pores. Few areas with a coating of grains and aggregate, composed of iron oxides and clay. Nodules (2 %) typic, composed of iron and quartz grains, in the decomposition stage. |
Fluvic Sodic Gleyic Solonchak (Hypersalic, Loamic, Ochric) - Gleissolo Sálico Sódico típico; Cgnz2 (0.32-0.50 m) |
Compose 50 % of the groundmass. Poorly selected, containing quartz (70 %), quartzite (10 %), feldspar (15 %) and other minerals (5 %). Subhedral grains. Smooth subangular spherical and sub-spherical (80 %); and smooth angular subspherical (20 %) |
35 % of groundmass, grayish brown, composed of clays as kaolinite. Stipple-speckled (80 %) and mosaic-speckled (20 %) b-factory. |
Massive structure, with few areas weakly developed (15 %). Porphyric distribution. |
Compose 15 % of which: 40 % are channels, and 60 % cavities. |
Predominance of internal hypo-coating in the pores by compounds of iron amorphous. Nodules (1 %) typic, composed of iron and quartz grains. |