Abstract
Technogenic soils in underground gas storage areas are formed under the combined impact of natural and technogenic soil-forming factors (pipelining, gas well drilling and exploitation). New layers and horizons appear in the soil profiles. Technogenic layers (drilling technogenic layer (TSd), a chemically polluted loamy layer formed during the period of gas well drilling and exploitation; technogenic layer (TS..), a periodically restoring chemically polluted sandy layer formed during the period of gas well exploitation); technogenic horizons (mixed drilling horizon (TURd), a natural-technogenic horizon formed during the drilling period because of mixing of natural soil material); and modification horizons (mixed organic horizon (TURAY), an organic horizon formed by soil restoration or organic matter transformation), were distinguished.
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