Abstract
Upper Devonian terrigenous red rocks in the middle Timan region enclose many paleopedocomplexes. Some sections include both paleosoil profiles with well-preserved coalified organic matter of in situ root systems and profiles lacking these features. Lithological investigations revealed that sedimentary beds are mostly composed of sand-to gravel-sized clay clasts (with small pebbles) and characterized by subaerial spasmodic proluvial genesis. The pelitic-silty bedded sediments accumulated in water basins with calm hydrodynamics are less widespread. It is established that organic matter of roots is preserved only if they are rapidly overlain by sediments of debris flows.
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