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Геоморфология

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№ 2 (2006)

Общетеоретические статьи

3-6 185
Аннотация
On the base of Vernadsky's comments on polymorphism as a chemical-mineralogical property of matter the concept of polymorphism as general attribute of land surface is put forward. The causes of this property and the routs of its investigations are discussed.
6-21 275
Аннотация
The concept "cryptomorphic geomorphologic structures" is explained. Their marginal position in the discreet morphotectonic sequence is determined as well as their origin dew to dissipation of deep mantle energy and the possibility of their coexistence together with morphostructures within mutual geomorphologic space. Some examples of cryptomorphic lithospheric structures are given; their dynamics and the use of the information about them in practical purposes are discussed.
21-33 269
Аннотация
There are 3 main types of the arid mountains: the desert (extra-arid) mountains, the mountains of the piedmonts, the high-mountains and the arctic mountains. Their development occurs under the eolian activity, saprolitization and desquamation. Within the arid mountains, there are two main morphological types of landscape: - "real" mountains in the active phase of development and "ruin" mountains in the "residual" phase of development. The belts of scours on the slopes combining with the desquamation surfaces are characteristic of the first type; foothills and piedmonts are widespread within the second one.

Геоморфология и народное хозяйство

34-43 192
Аннотация
Author suggests the classification of morphodynamic processes on the linear embankments in the North of West Siberia. It is based on extremely generalized types of ground movements: downward, lateral, complex. The description and examples are given of embankment morphology changes caused by erosion, suffosion, slope processes and coastal dynamics during floods. The classification aims the engineering-geomorphologic purposes and may be used for the maintenance of embankment stability.
43-49 249
Аннотация
In the regions of placer deposits of Priokhotie erosion plays the major role in the transformation of disturbed lands. The result is the mitigation of the contrast between the anthropogenic and natural landforms.

Научные сообщения

50-61 238
Аннотация
The Late Pleistocene glaciations, dynamics of climate, and vegetation of Tauiskaya bay region were reconstructed on the base of geomorphologic, palynostratigraphic, lychenometric, and 14C data. The glacial complexes, geomor-phology of glacial regions, data on Holocene climatic variations, and rock glaciers are described.
62-73 226
Аннотация
Calculations of the spread of backwaters and falls of the Lena (near the Aldan mouth) were fulfilled. The features of bed morphology resulted from the interaction between the main river and the tributary are described. The major characteristic of the Lena channel dynamics is the change of the most active arm of the river with its main stream every 15-25 years. This change depends on water balance of the Lena and the Aldan, forming the backwater condition or its absence. The ratio of levels and dates of flood peaks is of significant importance in this process.
73-82 270
Аннотация
Digital topographic databases allow providing more complex and many-sided analysis of relief than cartographic methods. Several new types of statistical description and graphic representation of global relief are examined. They are also suitable for investigating the regional problems. The adequate methods of geomorphologic interpretation are necessary for the complete realization of the digital analysis capability.
82-92 347
Аннотация
In the paper, special attention is paid to catastrophic processes like failures, rockfalls, landslides, mudflows, lahars, tsunamis, and storm-induced surges. The role of permafrost in the formation of mesorelief and its related deposits is examined. The reputed glacial deposits were formed by lahars, mudflows, and seismofalures. Eolian processes played significant role in the coastal relief formation during cold epochs in the Late Pleistocene and Holocene.
93-101 204
Аннотация
The review of the Russian and foreign literature made possible localizing the distribution of the relict planation surfaces in the foreign Europe. These surfaces are semiarid Quaternary pediments forming one of the youngest and lowest denudation levels. They are distributed over the Central and South Europe; northward they reach the boundary of maximum Pleistocene glaciation. Within this area, semiarid pediments occur discreetly, as more or less detached surfaces of flat gradient and different height. They are absent in the regions with maritime climate and in the axial zones of epigeosyncline mountains. The pediments formed under dry conditions during 600-800 millennia at the turn of the Eopleistocene and beginning of the Neopleistocene. The results obtained are in good correspondence with the earlier data for East Europe.
101-109 201
Аннотация
Geomorphologic facie of slopes is specified by two independent parameters: the steepness of the slope and mechanical composition of deposit (or characteristic of denuded slope surface). Using this idea author represents the scheme of mountain relief flattening under the condition of rhythmic fluvial activity. According to idealized scheme the slope evolution is directional discontinuous process, of which every episode includes denudation and accumulative stages. In the reality they may be not strictly separated.
109-117 221
Аннотация
The weakness of accumulation is the characteristic feature of the Baikal coastal zone. The coarse sediments are predominant at the water edge. The type of the coast depends on the structure of the lake basin. High rocky banks are typical for the west flange, where accumulation is almost absent. The east low-graded flange has much of an entass-ments, enrockments, and pebble beaches.

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ISSN 0435-4281 (Print)