|
Izhora Plateau
The Izhora Plateau () is an elevated landform on Ordovician limestone bedrock in the southwestern part of Leningrad Oblast, between the Gulf of Finland in the north and the Luga River in the south. Its northern edge is formed by the erosional cliff known as the Baltic-Ladoga Klint. It is formed by pre-Quaternary rocks.Zhdanov, Sergey & Kurilenko, Vitaly. (2017). Quantitative groundwater estimation of Izhora Plateau, Russian Federation using thermodynamic and kinetic methods for carbonate rock interaction in identified karst terrain. Carbonates and Evaporites. 32. 1-12. The highest part of the plateau is the Orekhovaya hill of Duderhof Heights at 176 m, situated in its extreme northeastern part. The plateau is mostly covered by agricultural lands. History It used to be the heartland of the historical region known as Ingria Ingria (; ; ; ) is a historical region including, and adjacent to, what is now the city of Saint Petersburg in northwestern Russia. The region l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Subject
The federal subjects of Russia, also referred to as the subjects of the Russian Federation () or simply as the subjects of the federation (), are the administrative division, constituent entities of Russia, its top-level political divisions. According to the Constitution of Russia, the federation consists of republics of Russia, republics, krais of Russia, krais, oblasts of Russia, oblasts, federal cities of Russia, cities of federal importance, an Jewish Autonomous Oblast, autonomous oblast, and autonomous okrugs of Russia, autonomous okrugs, all of which are equal subjects of the federation. Every federal subject has its own governor (Russia), head, a regional parliaments of Russia, parliament, and a constitutional court. Each subject has its own constitution or charter and legislation, although the authority of these organs differ. Subjects have equal rights in relations with federal government bodies. The subjects have equal representation – two delegates each – in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leningrad Oblast
Leningrad Oblast (, ; ; ) is a federal subjects of Russia, federal subject of Russia (an oblast). The oblast has an area of and a population of 2,000,997 (2021 Russian census, 2021 Census); up from 1,716,868 recorded in the 2010 Russian census, 2010 Census. Leningrad Oblast is highly industrialized. Its administrative center and largest city is Gatchina. The oblast was established on 1 August 1927, although it was not until 1946 that the oblast's borders had been mostly settled in their present position. The oblast was named after the city of Saint Petersburg, Leningrad. In 1991, the city restored its original name, Saint Petersburg, but the oblast retains the name of Leningrad. It overlaps the historical region of Ingria, and is bordered by Finland (Kymenlaakso and South Karelia) in the northwest and Estonia (Ida-Viru County) in the west, as well as five federal subjects of Russia: the Republic of Karelia in the northeast, Vologda Oblast in the east, Novgorod Oblast in the sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ordovician
The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years from the end of the Cambrian Period Megaannum, Ma (million years ago) to the start of the Silurian Period Ma. The Ordovician, named after the Celtic Britons, Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same Rock (geology), rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed Stratum, strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science), crystal forms of calcium carbonate . Limestone forms when these minerals Precipitation (chemistry), precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly Dolomite (rock), dolomite, a closely related rock, which contains a high percentage of the mineral Dolomite (mine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Of Finland
The Gulf of Finland (; ; ; ) is the easternmost arm of the Baltic Sea. It extends between Finland to the north and Estonia to the south, to Saint Petersburg—the second largest city of Russia—to the east, where the river Neva drains into it. Other major cities around the gulf include Helsinki and Tallinn. The eastern parts of the gulf belong to Russia, and some of Russia's most important oil harbors are located there, including Primorsk, Leningrad Oblast, Primorsk. As the seaway to Saint Petersburg, the gulf is of considerable strategic importance to Russia. Some of the Baltic Sea#Environmental status, environmental problems affecting the Baltic Sea are at their most pronounced in the shallow gulf. Proposals for an undersea tunnel, undersea Helsinki–Tallinn Tunnel through the gulf have been made. Geography The Gulf of Finland has an area of . The length (from the Hanko Peninsula to Saint Petersburg) is and the width varies from near the entrance to on the meridian of Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luga River
The Luga () is a river in Novgorodsky and Batetsky Districts of Novgorod Oblast and Luzhsky, Volosovsky, Slantsevsky, and Kingiseppsky Districts of Leningrad Oblast of Russia. The river flows into the Luga Bay of the Gulf of Finland. It freezes up in the early December and stays under the ice until early April. The length of the Luga is , and the area of its drainage basin is . Its main tributary is the Oredezh (right). The towns of Luga and Kingisepp, as well as the urban-type settlement of Tolmachyovo are located on the banks of the Luga. The mouth of the Luga is the site of the Ust-Luga container terminal. The source of the Luga is located in a peat production area in the northwest of Novgorod Oblast, several dozen kilometers northwest of the city of Veliky Novgorod. The river flows south, crosses into Batetsky District, and gradually turns west. A stretch of the Luga serves the border between Novgorod and Leningrad Oblasts. There, the Luga flows northwest, in the town ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic-Ladoga Klint
The Baltic Klint (Clint, Glint; , , ) is an erosional limestone escarpment and cuesta on several islands of the Baltic Sea, in Estonia, in Leningrad Oblast of Russia and in the islands of Gotland and Öland of Sweden. It was featured on the reverse of the 50 krooni note of 1928 and on the 100 krooni note of 1992. The Baltic Klint is active landform showing some retreat in the present. However it is not known to which degree the Baltic Klint originated in postglacial time or if it evolved from cliff-like forms sculpted by the Fennoscandian Ice Sheet. In Gotland 20th century cliff retreat rates have been estimated at 0.15 to 0.78 cm/year. Retreat of the Baltic Klint in Gotland has widened shore platforms. Geography The Baltic Klint extends approximately 1200 km from the island of Öland in Sweden through the continental shelf and the Estonian islands of Osmussaar and Suur-Pakri to Paldiski, then along the southern shore of the Gulf of Finland and Neva River to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS), as well as the current and most recent of the twelve periods of the Phanerozoic eon. It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today); a proposed third epoch, the Anthropocene, was rejected in 2024 by IUGS, the governing body of the ICS. The Quaternary is typically defined by the Quaternary glaciation, the cyclic growth and decay of continental ice sheets related to the Milankovitch cycles and the associated climate and environmental changes that they caused. Research history In 1759 Giovanni Arduino proposed that the geological strata of northern Italy could be divided into four succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbonates And Evaporites
''Carbonates and Evaporites'' is an international scientific journal published 4 times a year by Springer and provides a forum for the exchange of concepts, research, and applications on all aspects of carbonate and evaporite geology. This includes the origin and stratigraphy of carbonate and evaporite rocks and issues unique to these rock types: weathering phenomena, notably karst; engineering, environmental issues, mining, mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Mi ... extraction, caves, and permeability. Editorial Board Editor: J.W. LaMoreaux References External links * English-language journals Geology journals Springer Science+Business Media academic journals {{earth-science-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duderhof Heights
Duderhof Heights or Duderhof Hills (; ) is a small highland area in the southwestern part of Saint Petersburg (Krasnoselsky District, Saint Petersburg, Krasnoselsky District). The nearest railway station, Mozhayskaya (formerly Duderhof) of the Ligovo-Krasnoye Selo-Gatchina railroad (constructed in 1859), is situated immediately to the west of the hills. Geography The heights are located to the south of the town of Krasnoye Selo, on the northern edge of the Izhora Plateau, which consists of several hills, most notably, the Orekhovaya hill (, lit. ''Hazel Hill'', ), the highest point of Saint Petersburg at 176 m (577'), in the south, and the Voronya hill (, lit. ''Crow Hill'', ), 147 m (482'), in the north. Sometimes other smaller hills are considered part of the area as well: the Lysaya hill (, lit. ''Bald Hill'') further northward, the Kirchhof hill () to the east, and the Kavelakhtinskaya ridge () further to the south (however, all the smaller hills are situated in Leningrad Oblast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Field (agriculture)
In agriculture, a field is an area of land, enclosed or otherwise, used for agricultural purposes such as cultivating crops or as a paddock or other enclosure for livestock. A field may also be an area left to lie fallow or as arable land. Many farms have a field border, usually composed of a strip of shrubs and vegetation, used to provide food and cover necessary for the survival of wildlife. It has been found that these borders may lead to an increased variety of animals and plants in the area, but also in some cases a decreased yield of crops. Paddock In Australian English, Australian and New Zealand English, any agricultural field may be called a ''paddock'', especially if for keeping sheep or cattle. If stock are grazed there, the space may be called a ''run'', e.g. ''sheep run''; ''cattle run''. The term paddock is used more specifically in animal husbandry for a system in which grazing land is divided into small areas, paddocks, and the stock graze each paddock in tur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
