Aa. Velichko et al., LATE-PLEISTOCENE CRYOGENESIS AND MODERN SOIL FORMATION IN THE SOUTHERN TAIGA ZONE (WITH SPECIAL REFERENCE TO VLADIMIR OPOLE), Eurasian soil science, 29(9), 1996, pp. 984-991
Combined paleogeographical studies proved that the relict cryogenic mi
crorelief, formed in the Late-Pleistocene permafrost zone, is the prin
ciple factor of differentiation of modern soil cover. Members of soil
sequences differ in their properties, nutrient content, and potential
fertility. The second humus horizons, being regarded as relict ones, d
evelop in the depressions of paleocryogenic relief. These horizons wer
e formed in the Atlantic period of the Holocene.