Development of Exogenous Geological Processes in the Territory of the Republic of Adygea

2020 ◽  
Author(s):  
Sergey A. Lebedev ◽  
Lenina A. Korinevich
Keyword(s):  
Geological Processes ◽  
The Republic

scholarly journals Precambrian metamorphites as part of the petrographic diversity of Rila Geopark

2021 ◽  
Vol 82 (1) ◽  
pp. 11-29
Author(s):  
Dimitar Sinnyovsky
Keyword(s):  
Popular Science ◽  
Metamorphic Rocks ◽  
Historical Overview ◽  
Geological Processes ◽  
Lithostratigraphic Units ◽  
Intrusive Rocks ◽  
Geological Information ◽  
Geological Map ◽  
The Republic ◽  
Popular Language

The petrographic diversity of Rila Mountain is an important prerequisite for the development of Rila Geopark and its nomination for UNESCO Geopark. According to the principle of the thematic geodiversity, the leading theme of the geopark – glacial landscapes, is complemented by the remarkable petrographic diversity of igneous and metamorphic rocks, in which alpine glacial forms are developed. Following a recent review of the intrusive rocks that make up the Rila-West Rhodope Batholith, the concept of Rila Geopark would not be complete without a retrospective of the metamorphic rocks that are an integral part of its petrographic diversity. The different approaches (lithodemic and lithotectonic) to the mapping of the Rila-Rhodope Massif divided the geologists into two camps. This led to a discrepancy in terminology and nomenclature of the metamorphic units, which is unacceptable in the context of the educational priority of the geopark. For the purpose of geotourism, clear and understandable interpretations are required to provoke the visitors’ interest in geological processes and phenomena, rather than confusion and perplexity. This article is a historical overview of the geological study of the metamorphic terrains in Rila Mountain with a scheme of lithodemic units based on the existing lithostratigraphic nomenclature. This approach allows the preservation of the names of the lithostratigraphic units, whose toponymic adjectives derive from well known geographical features in the Rila-Rhodope Massif. The rank term is replaced by a lithological or descriptive term, which frees the nomenclature from the dogmatic restrictions of the stratigraphic code and reduces the distance between the strictly scientific and popular science approach used for interpretation of geological information in a popular language accessible to the general public. This methodology is consistent with the approach recommended for mapping of non-stratified bodies on the Geological Map of the Republic of Bulgaria at a scale 1:50 000.

scholarly journals Geological-geomorphological characteristics and petrographical composition of the St. Anastasia Island

2021 ◽  
Vol 8 (1) ◽  
pp. 118-125
Author(s):  
Dimitar Dimitrov ◽  
Banush Banushev
Keyword(s):  
Upper Cretaceous ◽  
Volcanic Rocks ◽  
Alkali Feldspar ◽  
Geological Processes ◽  
The Republic ◽  
Historical Heritage

Abstract St. Anastasia Island is one of the symbols of the cultural and historical heritage of the Republic of Bulgaria. This raises the need for the study of risky oceanographic factors, climatic phenomena, risky geological processes as well as detailed petrographical characteristics of the Upper Cretaceous volcanic rocks forming the islands. The results of the petrographical study show that the island was built by Alkali feldspar trachytes. The volcanics from St. Anastasia Island shows a close petrochemical similarity to the volcanics from Alatepenski paleovolcano belonging to the “Peripheral Volcanic Centers” in the region.

EXPOSURE OF ECONOMICALLY ATTRACTIVE MOUNTAIN TERRITORIES OF THE REPUBLIC OF NORTH OSSETIA-ALANIA TO DANGEROUS GEOLOGICAL PROCESSES

2017 ◽  
Vol 9 (3) ◽  
pp. 195-210
Author(s):  
Khijsa Chotchaev ◽  
◽  
Sevada Oganesyan ◽  
Oleg Goncharenko ◽  
◽  
...  
Keyword(s):  
Geological Processes ◽  
The Republic ◽  
North Ossetia

scholarly journals Overview Of Slope Stability, Earthquakes, Flash Floods And Expansive Soil Hazards In The Republic Of Yemen

2021 ◽  
Vol 71 ◽  
pp. 71-78
Author(s):  
Hussein Ahmed Hasan Zaid ◽  
◽  
T.A. Jamaluddin ◽  
Mohd Hariri Arifin
Keyword(s):  
Slope Stability ◽  
Arid Regions ◽  
Expansive Soils ◽  
Expansive Soil ◽  
Flash Floods ◽  
Mitigation Measures ◽  
Geological Hazards ◽  
Natural Conditions ◽  
Geological Processes ◽  
The Republic

Yemen has harsh natural conditions that increase certain geological processes more than other regions, leading to a variety of geological hazards. Yemen’s typical topography is distinguished by coastal plains of the Red Sea and cliff foothillls, followed by mountains of the Arabian Shield. These types of geological hazards can be classified into slope stability, earthquakes, flash floods and expansive soils. The current literature review presents a description backed with examples of the certain geological hazards in Yemen. The obtained results indicate that further consideration and thought are highly required for semi-arid regions. National and foreign organizations have to collaborate together with other individuals to maintain the adjusted environmental system and reduce the potential geological hazards. Therefore, mitigation measures should be implemented to avoid and minimize these geological hazards.

scholarly journals Typification of permafrost rocks in the area of the projected Elegest–Kyzyl–Kuragino railway

2020 ◽  
Vol 59 (3) ◽  
pp. 69-74
Author(s):  
Yuliya Yur’evna NADEZHDINA ◽  
Keyword(s):  
Natural Conditions ◽  
Software Products ◽  
Geological Processes ◽  
Geological Conditions ◽  
Mountain System ◽  
The Republic ◽  
Western Sayan ◽  
Relationship Of ◽  
Tyva Republic ◽  
The Relationship

The relevance of the research. Natural conditions of the construction area of the Elegest–Kyzyl–Kuragino railway are extremely difficult. The territory under development is located in two regions: the Krasnoyarsk Territory and the Tyva Republic and crosses the complex mountain system of the Western Sayan Mountains. The climate of the territory under consideration is sharply continental, the average annual air temperature is –5.4 °С, the distribution of precipitation is uneven (northern part is 290–300 mm, southern part is 400–420 mm). Moreover, research is complicated by the length of the object, which is more than 400 km. For the Republic of Tuva, the projected railway will play an important role in the development of the fuel and energy complex, as well as in the development of the country’s economy as a whole. The study area is poorly studied, but it is characterized by the development of various geological processes, including permafrost. There is very little information on the distribution of permafrost, and it is scattered. The purpose of the work is to summarize and analyze information on the distribution of permafrost in the study area. The material examines the relationship of elevation marks with the spread of permafrost, and also gives a brief description of the geological conditions of the study area, relief, and possible dangerous geological processes. Methods of research. Generalization and construction of the map was carried out using AutoCAD and ArcGIS software products. As a result of the work, an analysis of literature sources on the distribution of permafrost and seasonally frozen rocks was carried out, information was generalized and a map of the distribution of permafrost by type (continuous, island, discontinuous) was constructed, and the boundaries of the distribution of permafrost were clarified in accordance with the altitude and type of permafrost.

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

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