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Low/medium magnifications |
Low/medium magnifications |
Contact between Bt and BCkt horizon in a Calcic Palexeral decapitate.
When the soil decapitates, the bottom of both horizon Bt and Ck adjust and the illuviation clay horizon invades the carbonate accumulation horizon.
Thin section RNS16-4. Limit Horizon between 2Bt3 and 2BCtk.
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Low/medium magnifications |
Low/medium magnifications |
Micromorphological features
After browsing these images you should have found, at least, the following characteristics (left side image only with poloarizer, the one on the right side with crossed nicols).
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| Bt horizon. Almost all the clay has illuvial origin | |
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| Ckt horizon. Illuvial clay coating in a micritic carbonate plasma (calcite) | |
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| Two fase illuviation clay. First, the yellow one, later the orage one, thus representing a change in the soil climate conditions. | |
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| Composed coating over a pore. First, carbonates, second illuvial clay, third carbonates, four clay and finally carbonates again ( 5 changes in the soil conditions; and another additional showed in the yellow illuvial coating clay and the orange one on the upper area of the microscope field). | |
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| Replacement of muscovite by the carbonates | |
Ai, illuvial clay; C, micritic carbonates |
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Soil data
Morphology, physical and chemical analysis
Micromorphological images: Hor Ap Hor Bt1 Hor 2Bt2 Hor 2Bt3 Hor 2BCtk Hor 2CBtk comparative study
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This soil was presented in XIII Reunión Nacional de Suelos in Salamanca in 1985.
