Геоморфология и палеогеография

Расширенный поиск
№ 4 (2009)

Общетеоретические статьи 

3-12 238
The paper represents the edited record of discussion of the main concepts of system geomorphologic analysis which took place in the laboratory of geomorphology IGRAS. Special attention was paid to the essence of the term geomorphologic system and its organization. Different opinions show the lack of consensus the necessity of which is obvious.
12-16 368
Geomorphologic system (GMS) is the aggregate of topographic forms and elements interrelated by morphogenic processes, which possess emergent features and is characterized by inner activity. These are complex stochastic systems having the attributes of centrality of purpose and autoregulation. One of the research problems is to show that given complex of forms may be considered as a system and not as merely body or mix of elements, that this complex answers the main system principles among which integrity denominates self-sufficiency of this object, its distinctness. Geomorphic processes provide inner activity and self-sufficiency of GMS. The integrity means compactness of GMS, its space unity. GMSs may only be divided or united until they persist as integral geomorphologic units, until they posses such qualities as height (depth), length, slope, form of profile etc.
16-28 411
Geomorphologic convergence denominates the morphological similarity of landforms of different genesis. The concept of temporal convergence leads to special attention to genesis as complex characteristic. Some examples of morphological convergence are given as well as methodology of its detection.

Геоморфология и народное хозяйство 

29-38 375
Late Mesozoic Aginskaya tectono-magmatic structure was formed in the lower part of brittle earths crust. It has no direct or indirect manifestation in the morphostructure of the region, being localized over TMA zone of NE strike as magmatic focus by the mantle activization. Its ring-shaped morphology and ore zonality were formed by magma differentiation. Its manifestation on space images as lineament pattern occurs due to springtime development of plant communities, which are indicators of small landforms.

Методика научных исследований 

39-44 438
A wide set of methods may be applied for detailed spatial-temporal analysis of floodplain formation within different parts of river valley. Some results of various methods use for the assessment of deposition rates on the floodplain are presented. Perspectives of floodplain deposition rates application for the fundamental and applied investigations are described.
45-52 538
Actual methods of relief energy maps compilation are discussed, and a new one is proposed. This method counts the potential energy and morphometric characteristics of slopes: area, average angle, density and depth of dissection, exposure, average height.

Научные сообщения 

53-63 375
For the first time the contribution of aftershock-induced landslides to denudation is calculated. This contribution strongly depends on difference between magnitudes of the earthquake and the main aftershock. A number of earthquakes took place in SE Altai in Holocene and triggered landslides are situated in close vicinity to the largest one following the 27 September 2003 Chuya earthquake (Ms = 7.3). Supposing the sameness of mechanisms of paleoearthquakes and the 2003 Chuya earthquake the value of the regional coefficient a = 1.2 is suggested. This value provides proper assessment of the contribution of aftershock-induced landslides to seismo-gravitational denudation.
64-73 414
The main contours of the coastline of the Peter the Great Bay and its islands are configurated by the fragments of regional and transregional faults with which correlate the boundaries of separately developing blocks and long scarps in the transition zone from the southern Primorye section of the Eurasian continent to the Sea of Japan. The influence of disjunctives on the coast formation has diverse manifestation and depends on characteristics of the fracture system proper (orientation, parameters of zone, rock composition etc.), geological, hydrological, hydrogeological, geomorphological conditions. The systems of fracture dislocations are the most important elements of the shore and coastal geomorphological systems what should be considered both in the analysis of the theoretical problems of morphogenesis and in the practical problems of the coasts development.
74-84 465
Slumping is one of the main geomorphic processes at the right side of Zeya River valley in its lower range. Investigation of volume and sliding mechanism of Malosazankovsky landslide occurred in November 1985 have shown that this landslide was composite one and may be considered as the largest one in the Russian Far East. A wide occurrence of landslides in the Zeya River valley determines in many respects the character of its channel formation.
85-91 487
The karst processes took part in the formation of the natural complexes in the Belorussian-Baltic region of the East-European Plain since the Devon. Role of the karst is not confined to areas of exposed forms of karst denudation and sporadic accumulation of derivative calcium carbonate. Under the quaternary cover of glacial and fl uvio-glacial deposits there are large buried karst complexes developed under the conditions similar to recent landscapes of the low latitudes. Relic karst forms, including the buried ones, look more prominent than exposed ones and have wider expansion.
92-98 487

Leaching of underwater elements of gypsum banks causes the decreasing of the bench width. The activity of the leaching is comparable with the rate of cliffs abrasion. The volume of solid flow from the gypsum bank is tens and hundreds times less than that from the banks of the other rocks.

99-108 467

Ridge type landforms are abundant in the Manych depression and have erosion origin. They consist of layered burtassko-gudilovsky lacustrine deposits and were formed stepwise during the end of burtasskoye time, in the epoch of Khvalyn strait and in the post-Khvalyn time.


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