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Геоморфология и палеогеография

Расширенный поиск
№ 2 (1998)
3-13 37
Аннотация

Correlation between active faults and exogeodynamic processes at the East-European Plain are analysed. The intensity of karst, landslides and erosoinal dissection appear to be almost independent of fault's density - the impact of the active faults in the variability of the processes doesn't exceed several percents. More distinct correspondence may be seen when analysing the strikes of the faults and configuration of different intensity regions. Their boundaries are to some extent controlled by active faults. The influence of active faults' density on the exogeodynamics, though valuable in several local regions of the Plain, is small on the whole in comparison to other tectonic and climatic factors.

13-22 56
Аннотация

Recent soil erosion is nature-social process. Its classification should be based on degree and peculiarity of anthropogenic changes of denudation-accumulation factors. Attributes of land surface morphology and slope morphosystems, which are affected by land use technology, may serve as main criteria of soil erosion classification. Their investigation is necessary part of recent relief formation analysis.

Дискуссии

23-28 46
Аннотация

Importance of symmetry principle in geomorphology, though having been accepted, didn't lead to any significant results. It may be explained by complexity of relief (its imperfect or illegible symmetry) as well as by the absence of convenient definitions of symmetry and associated terms: a-, dis- and antisymmetry. In the paper the corrections of these concepts are given. The drawings shown lead to the conclusion that conception of «initial Earth's dissymmetry», used as background for lithosphere and relief evolution models, is incorrect. Author points out that in the Earth's landforms symmetric-antisymmetric systems (cell) are widespread; symmetry is also related to entropy. It gives theoretical geomorphology an opportunity to rise to higher level of math modeling - the level of nonlinear thermodynamics of unreversabie processes.

28-33 69
Аннотация

The interpretations of term «gully» are discussed concerning the debatable paper of N.N. Nazarov (Geomorphology, 1997, 4). Authors deny the explication of this term proposed by N.N. Nazarov: recent anthropogenic landform only. Natural erosional forms should also be considered as gullies and should be included into general geomorphologic analysis of erosional forms. Classification, suggested by N.N. Nazarov, is critically examined and viewed as too complicated and incorrect.

Методика научных исследований

34-43 60
Аннотация

The possibility of land surface elements classification by the morphological principle only is grounded. The morphological map (the map of land surface elements) is considered as basic model of locality. Instead of complicated set of insignia, structural and vector lines are used in the legend of the map. These lines express, correspondingly, discrete and continual aspects of land surface. In the result the legend became much simpler and the map based on it - more readable, at that informative value of the latter may be augmented.

43-52 39
Аннотация

For taking erosion-control measures the maximum final size of gully is important. Static model for calculating the longitudinal and transversal profiles is proposed. Gully is supposed to be stabile, formed in cohesive ground, the stream velocity - to be higher than critical one, at which accumulation of little particles begins, and at the same time to be lower than the scouring rate. In the model the whole range of water discharge is taken into account. The corresponding computer program has been compiled.

Научные сообщения

53-59 30
Аннотация

Further development of plate tectonic applications to Azerbaijan relief formation and differentiation is represented PZ-MZ evolution of ancient roots of morphostructure, its neotectonic blocking and transformation, nappes, which are manifested in recent landforms, are described. Morphotectonic scheme of Azerbaijan is adjusted to these data.

59-65 74
Аннотация

Widespread occurence of high socle terraces in all large, middle and small valleys of Volga-Kama region is established first. At least two their levels are proved to exist. The age of upper level is dated to eopleistocene by palaeontological data and of lover one - to the first half of early Quaternary on the analogy of other regions.

66-75 34
Аннотация

The results of multiannual investigations of water runoff and solid flow in the typical gylly catch basins are discussed. The test site was chosen in the central part of European Russia. Some regular features of gully channel process are established in the test site with the rocks of different density and granulometric composition. Quantitative characteristics of channels morphometry and ephemeral flood streams hydraulics are found. Some field data of gully's debris cone formation in the valley of Protva River are represented.

75-80 37
Аннотация

Characteristic features of gullies, extrinsic to other erosion forms, are under discussion. Gully formation is considered as one of constituent elements of relief development. It is dynamic form of curtain shape and extent. Classification principles based on different characteristics were suggested. The classification by developmental stages is one of the most interesting one. Five stages classified by value of growing velocity were deduced.

81-90 52
Аннотация

During Late Cenozoic the lead geomorphologic processes in the Western Priokhotie changed together with relief and climate evolution. Plains with areas of hummocky topography have been transformed into deeply dissected low and middle mountains. Climate has changed from humid subtropical (Oligocene) into frigid (subarctic) with tundra development (Late Pleistocene). All these conditions have formed recent surface pattern. Many processes are now very slow, but they changed many times in the Late Cenozoic. Each time interval was characterised by specific set of lead geomorphologic processes and of extreme, catastrophic, ones, which were locally distributed. Analysis of relief evolution allows to date the formation of the ground features' main types.

90-95 40
Аннотация

Evolution of ancient rivers on the Barents and Kara Seas Shelf through the Late Cenozoic is considered. Erosional origin of numerous valleys remaining in the recent and ancient relief has been proved. Shapes, cross-sections and distribution of river valleys were investigated. Seismic acoustic data were interpreted and map of ancient river valleys existed on the Barents and Kara Seas Shelf during Late Cenozoic regressions has been compiled. Maximum of neotectonic uplift and major regression was shown to occur during Late Miocene.



ISSN 2949-1789 (Print)
ISSN 2949-1797 (Online)