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Moldavian Plateau
The Moldavian Plateau () is a geographic area of the historical region of Moldavia, spanning nowadays the east and northeast of Romania, most of Moldova (except the south), and most of the Chernivtsi Oblast of Ukraine (where it is known as the ''Pokuttian-Bessarabian Upland''). Limits The Moldavian Plateau is bounded (in clockwise order), as follows. * To the west by the Eastern Carpathian Mountains (). * To north and north-east by the Podolian Plateau (). * To the east and south east by Black Sea Lowland across which to the east stretches the Pontic Plain (), part of the Eurasian Steppe () and to the south towards the Black Sea the Bugeac Plain (), comprising in Moldova. * To the south by the Romanian Plain (also known as the Wallachian Plain) and the Bărăgan Plain (). * To the southwest by the Vrancea Hills (), part of the Sub Carpathians (also known as the Curvature Carpathians) (). The Moldavian Plateau comprises over two-thirds of the territory of the medieval Principalit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moldavia
Moldavia (, or ; in Romanian Cyrillic alphabet, Romanian Cyrillic: or ) is a historical region and former principality in Eastern Europe, corresponding to the territory between the Eastern Carpathians and the Dniester River. An initially independent and later autonomous state, it existed from the 14th century to 1859, when it united with Wallachia () as the basis of the modern Romanian state; at various times, Moldavia included the regions of Bessarabia (with the Budjak), all of Bukovina and Hertsa region , Hertsa. The region of Pokuttya was also part of it for a period of time. The Moldavia (region of Romania) , western half of Moldavia is now part of Romania, the eastern side belongs to the Moldova , Republic of Moldova, and the Chernivtsi Oblast , northern and Budjak , southeastern parts are territories of Ukraine. Name and etymology The original and short-lived reference to the region was ''Bogdania'', after Bogdan I, the founding figure of the principality. The name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Principality Of Moldavia
Moldavia (, or ; in Romanian Cyrillic: or ) is a historical region and former principality in Eastern Europe, corresponding to the territory between the Eastern Carpathians and the Dniester River. An initially independent and later autonomous state, it existed from the 14th century to 1859, when it united with Wallachia () as the basis of the modern Romanian state; at various times, Moldavia included the regions of Bessarabia (with the Budjak), all of Bukovina and Hertsa. The region of Pokuttya was also part of it for a period of time. The western half of Moldavia is now part of Romania, the eastern side belongs to the Republic of Moldova, and the northern and southeastern parts are territories of Ukraine. Name and etymology The original and short-lived reference to the region was ''Bogdania'', after Bogdan I, the founding figure of the principality. The names ''Moldavia'' and ''Moldova'' are derived from the name of the Moldova River; however, the etymolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Geosciences
''Open Geosciences'' is a peer-reviewed open-access scientific journal covering all aspects of the Earth sciences. It is published by De Gruyter and the editor-in-chief is Piotr Jankowski (San Diego State University). The journal was established in 2009 as the ''Central European Journal of Geosciences'', co-published by Versita and Springer Science+Business Media. In 2014, the journal was moved to De Gruyter. It obtained its current name in 2015, when it became open-access. Abstracting and indexing The journals is abstracted and indexed by the following services: *Scopus * Solid States and Superconductivity Abstracts *GeoRef *Google Scholar *SCImago Journal Rank *WorldCat * ReadCube *Astrophysics Data System *Index Copernicus *Directory of Open Access Journals (DOAJ) *Current Contents - Clarivate Analytics (formerly Thomson Reuters) *Journal Citation Reports - Clarivate Analytics (formerly Thomson Reuters) *Science Citation Index Expanded (SCI) - Clarivate Analytics (formerly T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landslide
Landslides, also known as landslips, rockslips or rockslides, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Landslides are frequently made worse by human development (such as urban sprawl) and resource exploitation (such as mining and deforestation). Land degradation freque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Badland
Badlands are a type of dry terrain where softer sedimentary rocks and clay-rich soils have been extensively eroded."Badlands" in '' Chambers's Encyclopædia''. London: George Newnes, 1961, Vol. 2, p. 47. They are characterized by steep slopes, minimal vegetation, lack of a substantial regolith, and high drainage density.A.J. Parsons and A.D. Abrahams, Editors (2009) ''Geomorphology of Desert Environments'' (2nd ed.) Springer Science & Business Media Ravines, gullies, buttes, hoodoos and other such geologic forms are common in badlands. Badlands are found on every continent except Antarctica, being most common where there are unconsolidated sediments. They are often difficult to navigate by foot, and are unsuitable for agriculture. Most are a result of natural processes, but destruction of vegetation by overgrazing or pollution can produce anthropogenic badlands. Badlands topography Badlands are characterized by a distinctive badlands topography. This is terrain in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay
Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide. Clays develop plasticity (physics), plasticity when wet but can be hardened through Pottery#Firing, firing. Clay is the longest-known ceramic material. Prehistoric humans discovered the useful properties of clay and used it for making pottery. Some of the earliest pottery shards have been radiocarbon dating, dated to around 14,000 BCE, and Clay tablet, clay tablets were the first known writing medium. Clay is used in many modern industrial processes, such as paper making, cement production, and chemical filtration, filtering. Between one-half and two-thirds of the world's population live or work in buildings made with clay, often baked into brick, as an essenti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gritstone
Gritstone or grit is a hard, coarse-grained, siliceous sandstone. This term is especially applied to such sandstones that are quarried for building material. British gritstone was used for millstones to mill flour, to grind wood into pulp for paper and for grindstones to sharpen blades. "Grit" is often applied to sandstones composed of angular sand grains. It may commonly contain small pebbles. "Millstone Grit" is an informal term for a succession of gritstones which are to be found in the Pennines (including the Peak District) of northern England. These sediments were laid down in the late (upper) Paleozoic era, in the Carboniferous period, in deltaic conditions. The Millstone Grit Group is a formal stratigraphic term for this sequence of rocks. The gritstone edges of the Peak District The Peak District is an Highland, upland area in central-northern England, at the southern end of the Pennines. Mostly in Derbyshire, it extends into Cheshire, Greater Manchester, Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sand
Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is usually defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass. The composition of sand varies, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz. Calcium carbonate is the second most common type of sand. One such example of this is aragonite, which has been created over the past 500million years by various forms of life, such as coral and shellfish. It is the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years, as in the Caribbean. Somewhat more rarely, sand may be composed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravel
Gravel () is a loose aggregation of rock fragments. Gravel occurs naturally on Earth as a result of sedimentation, sedimentary and erosion, erosive geological processes; it is also produced in large quantities commercially as crushed stone. Gravel is classified by grain size, particle size range and includes size classes from granule (geology), granule- to boulder-sized fragments. In the grain size, Udden-Wentworth scale gravel is categorized into granular gravel () and pebble gravel (). ISO 14688 grades gravels as fine, medium, and coarse, with ranges for fine and for coarse. One cubic metre of gravel typically weighs about , or one cubic yard weighs about . Gravel is an important commercial product, with a number of applications. Almost half of all gravel production is used as construction aggregate, aggregate for concrete. Much of the rest is used for road construction, either in the road base or as the road surface (with or without bitumen, asphalt or other binders.) Natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carpathian Mountains
The Carpathian Mountains or Carpathians () are a range of mountains forming an arc across Central Europe and Southeast Europe. Roughly long, it is the third-longest European mountain range after the Ural Mountains, Urals at and the Scandinavian Mountains at . The highest peaks in the Carpathians are in the Tatra Mountains, exceeding , closely followed by those in the Southern Carpathians in Romania, exceeding . The range stretches from the Western Carpathians in Austria, the Czech Republic, Slovakia and Poland, clockwise through the Eastern Carpathians in Ukraine and Romania, to the Southern Carpathians in Romania and Serbia.About the Carpathians – Carpathian Heritage Society [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East European Platform
East European Platform or Russian Platform is a large and flat area of the East European Craton covered by sediments in Eastern Europe spanning from the Ural Mountains to the Tornquist Zone and from the Peri-Caspian Basin to the Barents Sea. Over geological time the platform area has experienced extension, inversion and compression. It has an area of about 6 million km2. The East European Platform sediments can be classified into the following groups: a "protoplatform" of metamorphosed sediments at the bottom, a "quasiplatform" of slightly deformed sediments, a "cataplatform", and a "orthoplatform" at the top. The Mesoproterozoic Jotnian sediments of the Baltic area are examples of a "quasiplatform". The oldest preserved continuous sedimentary cover in the platform date to the Vendian about 650 million years ago. The cycles of deposition of platform sediments are related to the development of nearby orogenies like the Timanide orogeny, the Uralian orogeny, the Hercyni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediment
Sediment is a solid material that is transported to a new location where it is deposited. It occurs naturally and, through the processes of weathering and erosion, is broken down and subsequently sediment transport, transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension (chemistry), suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification. Sediments are most often transported by water (fluvial, fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and stream channel, river channel deposits are examples of fluvial transport and deposition (geology), deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
