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The Echinoids Cyclaster and Galerites from the Maastrichtian Deposits of Volga Region

A first for the Volga region described two new species of echinoids and shows their stratigraphic position. Analyzed the relationship identified Maastrichtian sea urchins of the region coupled with synchronous complexes conjugate paleobiochores

Depositional Environment in Bobrikovsky Time within the South-east of the Russian Plate

The main results of lithology and facies investigations of the Bobrikovskian reservoir rocks material are based on processing drilling in recent years. The analysis of the existing ideas about the conditions of formation of the Lower Carboniferous terrigenous beds. It has been established that formation of terrigenous rocks in Bobrikovsky time had occurred in marine environment

The Results of Geoecological Research of Oktyabrskiy Settlement Soil Cover (Dergachevskiy District Saratov Region)

The results of soil cover research of Oktyabrskiy settlement (Dergachevskiy district, Saratov region) are presented. The magnetic susceptibility value and zinc concentration in research area soil are measured. Content of soil cower transformation by analyzed components is estimated. Also authors drew conclusions about the general geoecological soil condition

Forecast of Oil and Gas Deposits of Paleozoic Southwestern Buzuluk Basin

Described the geological structure of the south-western part of the basin Buzuluk. Here the thickness of the Paleozoic sediments has a similar structure to the north and south of the basin Buzuluk, where sediments of the Lower Carboniferous and Devonian numerous open gas deposits. The morphological, geophysical, geological, physical, and thermobaric lithological characteristics of the section. The description of the structure to which the deposits are associated with hydrocarbons. The methods of prospecting similar structures within the area under consideration

Colonial Level of Modular Organization in the Late Cretaceous Hexactinellids (Porifera). Primary Colonies

In the structure of modular organization of the Late Cretaceous hexactinellid sponges, the terminal position is assigned to colonial forms, with skeletons peculiar for complex, intricate structures. Primitive (primary) and genuine (secondary) colonies have been revealed. Skeletons of the primary forms, generally with multiple numbers of equivalent modules and oscula, differ morphologically from the genuine colonies in undeveloped module connecting elements, such as junctions and wall closures, and in the lack of ostia


Trends of Hydrocarbon Exploration in the Devonian-Lower Carboniferous Beds of the Stepnovskij Composite Swell

Arguments are provided to substantiate relationship between the beds from the Devonian-Lower Carboniferous and the Visean petroleum complexes in the Stepnovskij swell and the wash-out zone (from the Timanskian to the Vorobyevskian beds) of the underlying Eifelian-Lower Frasnian complex. The data on the compositions of oils and free gases is used to show the presence of a lateral migration flow from the Pricaspian Depression to the southern and the southwestern areas of the Volga-Ural petroleum province.

Brine Contribution to Hydrothermal Albitization Concomitant to Productive Reservoir Formation within the Cover (West Siberia)

Corrosion and regeneration types of plagioclase albitization have been determined in a terrigenous complex of productive reservoirs within the cover; this reflects two settings of tectonic-hydrothermal activation in a riftogenic sedimentary basin. Under the pulsating stress conditions (geodynamic anomalies), all plagioclases experience corrosion and, consequently, deanorthitization, with formation of authigenic albite foraminated crystals.

Developmental History of Emanation Method and Their Role in Oil Geology at the Present Stage

The key insights in the history emanation method development for search and investigation of minerals are examine, the radiometric methods applied at the present stage for research oil and gas deposits
are quoted, generalization of results emanation survey lead within ore and oil deposits is made, application of the given methods for search and investigation of minerals is proved.

Stratigraphic Significance of Gastropod and Improving of Local Stratigraphic Scheme of Sarmatian Deposits of Moldavian Transnistria and Neighboring Areas

In the article it is argued the use of gastropod for stratigraphic subdivisions of Sarmatian deposition. Reasonably allocated typical stratigraphic complexes gastropods for individual horizons sarmatian of Moldavian Transnistria and neighboring areas. Stratigraphy of the sarmatian scheme within the area contains additional, proposed by the author, stratigraphic units in the rank of «layers with gastropod fauna».