Page 89 - Microsoft Word - 20120528 Unesco study
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Vertisols
Origin:
Sediments that contains high proportion of swelling clays or swelling clays produced by newly
formed from weathering of rocks.
Environment:
These soils are characteristic of the settling basins and swamps in the plains and alluvial
valleys, mainly in tropical, subtropical, semiarid to subhumid and humid climates with clear
alternation of dry and wet season. The climax vegetation is savannah grassland and/or forest.
Comparison:
Because the major fraction of these soils are clays, these soils fall under the classification of
the following groups:
CH - Inorganic clays of high plasticity frank clays.
OH - Organic clays of medium or high plasticity, organic silts medium plasticity.
Effect of the action of rivers, the territory of Tabasco, is composed mainly of low plains and
wet of alluvial origin. The soil formation is due mostly to migration of particles weathered by
aquifer media. Added to this, Tabasco shows a biome very abundant in flora and fauna with a
humid tropical climate.
All this defines the characteristics of soils of the State of Tabasco as silty and clay soils that are
not entirely suitable for the construction, with traditional systems, of structural elements, such
as roads, so it needs new technologies such as the formation of zeolite concretes, in order to
achieve these soils from becoming structurally unfit for use.
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