For the first time the regionalisation of the territory of Russia by stability index (Lokhtin number) is carried out. The value of Lokhtin number depends on geomorphological and geological structure of valleys, channel alluvium dimensions, the degree of channel maturity and its slope.

Main aspects of paleogeographical events in high latitudes of Northern hemisphere are discussed for the optimum of last interglaciation concerning their influence on relief formation and sedimentation within the coastal zone of Eurasian arctic seas. Arctic shelf drilling data and results of studying of coastal marine terraces are presented in the paper. The position of mikulin layers in Pleistocene cuts was determined and coastal line of mikulin time was restored. The reconstruction of natural conditions of one of the warmest period in Late Pleistocene may serve as a basis for prediction of environmental changes in arctic region that will possibly take place in Late Holocene if warming of the Earth's climate is being continued.

Oil and gas rich layers in the Dnieper-Don basin are sandy bodies - accumulative landforms of shallow waters of Visean time. Analysis of spatial distribution, morphology and structure of these buried forms (bars, beaches, advanced deltas) makes it possible to determine the conditions of their formation. Using the paleogeographical maps one may reveal the most favorable regions for oil and gas prospecting.

Regime of morphostructures development, their inheritance, the links between primary sources and zones of accumulation of placer's material, the presence of chemical weathering crusts appear the most important factors, which define morphogenetic types and the extent of placer deposits. These factors of placers formation were strongly manifested at the certain periods of the history of relief.

Principles of sandy coast subdivision into three upper rank taxons were discussed and applied to the part of the south-west coast of Baltic Sea. Several examples of evaluation of active factors and conditions of coast dynamics are presented. The suggested scheme is pointed out to be an ideal and preliminary one.

The hierarchical system of Earth's landforms is worked out according to morphometric parameters. It consists of 18 ranks from sand ripple to global forms - geotectures. The main peculiarities of this system and of morphostructures of Earth's surface are considered as having an origin due to geophysical processes of different types and to wave deformations of our planet since morphometric sequences are multiple to the size of the Earth. Morphometric matrixes are worked out and applied to analysis of Earth's interior, to radar of the Earth, to ore prospecting, etc.

The main features of spatial distribution of karst, landslides, and strong technological transformations of land surface as well as amplitudes of erosional dissection within the Russian Plane are shown. The principles of exogeodynamic map compiling (in the scale of 1:5000000) and legend of this map are presented.

The main of Tiber delta development during the last 20 millennia are established from historical and archeological data, seismic sounding, drilling and C¹⁴ dating. Four stages may be ascertained: l - prodelta formation during the transgression and lagoon flood at the lack of deposits (13000-6000 Bp), 2 - silt delta formation and partial filling of lagoon at the constant sea level (6000-2000 Bp), 3 - beak-shaped delta formation and man-induced draining of it's parts (2000-100 Bp), 4 - completion of delta formation and washing away its seaward side since l 940-s resulting from dam construction on Tiber and other human activities.

Some phenomena concerning possible paleoseismodeformations and active tectonic structures are found in different regions of Karelia. In the North of Karelia the recurring displacements of stream valleys and of other erosional forms take place along the large faults which therefore may be considered as shears. In the same region the rnorphostructures of compression and extension types were analyzed, on the south-west shore of Onega lake hydrolakkolith was found in the lacustrine sediments. All these phenomena may be interpreted as possible paleoseismodislocations.

In the result of long-term field work and climatic conditions analysis three factors of slope deflation were revealed: l - high water level resulting in bank screes and collapses favourable for deflation, 2 - strong winter winds blowing perpendicularly to shore: 3 - steep and high slope of terrace causing the wind turbulence. Deflation intensity depends also on composition and density of slope substance.

The Ryasan district is subdivided into five geomorphological regions and numerous subregions, corresponding to local morphological complexes. The scheme of regionalisation and its description are given in the paper.

There are landforms on the surface of Mars, which morphology is similar to that of aeolian landforms on the Earth. Probably they were formed by wind, though at very low atmospheric pressure. Are such landforms relic or are they arising till now? Their morphology indicates the latter and data of crater statistics at the 9 regions of Mars gave an evidence of their recent geological age.

Tectonic deformations had a strong influence on the distribution of glaciation at Byelorussia during Pleistocene. Velocity and direction of ice movements were repeatedly changed that affected the completeness of Pleistocene stratigraphy, thickness and distribution of separate layers. Very clearly tectonic influence shows at distribution and size of marginal glacial complexes and in their inner structure. Linear elements of glacial relief controlled by faults are frequent.

Within the pleistoseismal zone of well-known Kebin earthquake (1911, M=8.2, northern Tien Shan) geomorphic evidences of more ancient catastrophes were found. These ancient seismodislocations are dated Holocene, Late Pleistocene and even late of Middle Pleistocene by geological-geomoiphological correlation method. This confirms and concretizes well-known thesis that seismogenic zones are steady and paleoseismodislocations are long-lived.

Neotectonic Khubadag-Balkhan rise is situated at die joint of Turan epihercynian platform and South-Caspian alpine geosyncline. Different parts of rise, fault tectonics and peculiarities of exogenic processes are examined. The importance of paleogeomorphological analysis of coarse sediments is pointed out.

Two geomorphological maps of China

XXIII session of Geomorphological commission of Russian Academy of Sciences