Ukrainian Shield
In geology, the Ukrainian Shield or the Ukrainian Crystalline Massif is the southwest shield of the East European craton. It has an area of about Ukrainian Crystalline Shield
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'' and is approximately long and up to wide. It is a which can be divided into the following megastructures: Middle
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Ukraine Geology
Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the north; Poland and Slovakia to the west; Hungary, Romania and Moldova to the southwest; and the Black Sea and the Sea of Azov to the south and southeast. Kyiv is the nation's capital and List of cities in Ukraine, largest city, followed by Kharkiv, Odesa, and Dnipro. Ukraine's official language is Ukrainian language, Ukrainian. Humans have inhabited Ukraine since 32,000 BC. During the Middle Ages, it was the site of early Slavs, early Slavic expansion and later became a key centre of East Slavs, East Slavic culture under the state of Kievan Rus', which emerged in the 9th century. Kievan Rus' became the largest and most powerful realm in Europe in the 10th and 11th centuries, but gradually disintegrated into rival regional powers before being d ...
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Dnister
The Dniester ( ) is a transboundary river in Eastern Europe. It runs first through Ukraine and then through Moldova (from which it more or less separates the breakaway territory of Transnistria), finally discharging into the Black Sea on Ukrainian territory again. Names The name ''Dniester'' derives from Sarmatian ''dānu nazdya'' "the close river". (The Dnieper, also of Sarmatian origin, derives from the opposite meaning, "the river on the far side".) Alternatively, according to Vasily Abaev ''Dniester'' would be a blend of Scythian ''dānu'' "river" and Thracian ''Ister'', the previous name of the river, literally Dān-Ister (River Ister). The Ancient Greek name of Dniester, ''Tyras'' (Τύρας), is from Scythian ''tūra'', meaning "rapid". The names of the Don and Danube are also from the same Iranian word ''*dānu'' "river". Classical authors have also referred to it as ''Danaster.'' These early forms, without -''i''- but with -''a''-, contradict Abaev's hypothesi ...
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Ilyinets Crater
Ilyinets is an impact crater in Ukraine (Vinnytsia Oblast). It is in diameter and the age is estimated to be 378 ± 5 million years (Upper Devonian). The crater is not exposed at the surface. The Ilyinets crater is located at the boundary of Rosynsko- Tikychki, Dnistersko- Buzki megastructures of the Ukrainian Shield In geology, the Ukrainian Shield or the Ukrainian Crystalline Massif is the southwest shield of the East European craton. It has an area of about

Orogeny
Orogeny () is a mountain-mountain formation, building process that takes place at a convergent boundary, convergent plate margin when plate motion compresses the margin. An or develops as the compressed plate crumples and is tectonic uplift, uplifted to form one or more mountain ranges. This involves a series of geological processes collectively called orogenesis. These include both structural deformation (physics), deformation of existing continental crust and the creation of new continental crust through volcanism. Magma rising in the orogen carries less dense material upwards while leaving more dense material behind, resulting in compositional differentiation of Earth's lithosphere (crust (geology), crust and uppermost mantle (geology), mantle). A synorogenic (or synkinematic) process or event is one that occurs during an orogeny. The word ''orogeny'' comes . Although it was used before him, the American geologist Grove Karl Gilbert, G. K. Gilbert used the term in 1890 to me ...
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Proterozoic
The Proterozoic ( ) is the third of the four geologic eons of Earth's history, spanning the time interval from 2500 to 538.8 Mya, and is the longest eon of Earth's geologic time scale. It is preceded by the Archean and followed by the Phanerozoic, and is the most recent part of the Precambrian "supereon". The Proterozoic is subdivided into three geologic eras (from oldest to youngest): the Paleoproterozoic, Mesoproterozoic and Neoproterozoic. It covers the time from the appearance of free oxygen in Earth's atmosphere to just before the proliferation of complex life on the Earth during the Cambrian Explosion. The name ''Proterozoic'' combines two words of Greek origin: meaning "former, earlier", and , meaning "of life". Well-identified events of this eon were the transition to an oxygenated atmosphere during the Paleoproterozoic; the evolution of eukaryotes via symbiogenesis; several global glaciations, which produced the 300 million years-long Huronian glaciation ...
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Archean
The Archean ( , also spelled Archaean or Archæan), in older sources sometimes called the Archaeozoic, is the second of the four geologic eons of Earth's history of Earth, history, preceded by the Hadean Eon and followed by the Proterozoic and the Phanerozoic. The Archean represents the time period from (million years ago). The Late Heavy Bombardment is hypothesized to overlap with the beginning of the Archean. The Huronian glaciation occurred at the end of the eon. The Earth during the Archean was mostly a ocean world, water world: there was continental crust, but much of it was under an ocean deeper than today's oceans. Except for some rare Relict (geology), relict crystals, today's oldest continental crust dates back to the Archean. Much of the geological detail of the Archean has been destroyed by subsequent activity. The Earth's atmosphere was also vastly different in atmospheric chemistry, composition from today's: the prebiotic atmosphere was a reducing atmosphere rich in ...
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Gya (unit)
bya or b.y.a. is an abbreviation for "billion years ago". It is commonly used as a unit of time to denote length of time before the present in 109 years. This initialism is often used in the sciences of astronomy, geology, and paleontology. The "billion" in bya is the 109 "billion" of the short scale of the U.S.,Gale, Joseph (2009). ''Astrobiology of Earth: The Emergence''. Oxford: Oxford University Press, p21./ref> not the long-scale 1012 "billion" of some European usage. Billion by this convention (109) is often called a "thousand million" in the UK and a "milliard" in some other countries.Chartrand, Mark (2004). ''Satellite Communications for the Nonspecialist''. New York: SPIE Press, p73./ref> For this reason, there is potential for some confusion, and some scientists prefer the unit Gya, while others prefer Ga (Giga-annum), however, bya remains in more widespread use. In 1974, the UK switched from the long scale to the short scale. Related units are mya ("million years ag ...
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Voronezh Massif
Voronezh Massif (also Voronezh Anteclise , or Voronezh Uplift) is a tectonic anteclise in the south of the Central Russian Upland with a high occurrence of the Precambrian basement. It lies to the southwest of the town of Voronezh, Russia. The massif covers the southwest area of European Russia. Ukraine lies to the southwest, while Belarus is to the west. The massif is bordered northwest of the Orsha depression and Zhlobin saddle, south-west and south of the Pripyat-Donetsk aulacogens, east of the Caspian Basin, and northeast of the Moscow Basin. The Voronezh Massif stretches from northwest to southeast, and between wide. The basement rocks usually occur at a depth of , sometimes coming to the surface of the Earth. The north-eastern and eastern slopes are gently sloping, while the southern slope is steeper. Two megablocks are distinguished in the structure of the Precambrian basement of the VCM: the eastern (Voronezh), composed of Lower Proterozoic 6 formations, and the western ...
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Volyn
Volhynia or Volynia ( ; see below) is a historic region in Central and Eastern Europe, between southeastern Poland, southwestern Belarus, and northwestern Ukraine. The borders of the region are not clearly defined, but in Ukraine it is roughly equivalent to Volyn and Rivne Oblasts; the territory that still carries the name is Volyn Oblast. Volhynia has changed hands numerous times throughout history and been divided among competing powers. For centuries it was part of the Polish-Lithuanian Commonwealth. After the Russian annexation during the Partitions of Poland, all of Volhynia was made part of the Pale of Settlement on the southwestern border of the Russian Empire. Important cities include Rivne, Lutsk, Zviahel, and Volodymyr. Names and etymology *, ; * ; *, ; * or ; *; * ; *; *; * or (both ); Volhynian German: , , or (all ); *, or . The alternative name for the region is Lodomeria after the city of Volodymyr, which was once a political capital of the medieval Vo ...
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Southern Bug
The Southern Bug, also called Southern Buh (; ; ; or just ), and sometimes Boh River (; ),
at the Encyclopedia of Ukraine is a navigable river located in Ukraine. It is the List of longest rivers of Ukraine, second-longest river flowing exclusively in Ukraine. While located in relatively close proximity, the river should not be confused with Western Bug or Bug which flows in opposite direction towards Baltics. The source of the Southern Bug is in the west of Ukraine, in the Volhynian-Podolian Upland, about from the Polish border, from where it flows southeasterly into the Bug Estuary (Black Sea basin) through the southern steppes (see Granite-steppe lands of Buh park). It is long and drains .
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Hirskyi Tikych
The Hirskyi Tikych () is a river in Ukraine, 167 km in length, a tributary of the Tikych, in the basin of Southern Bug. The Hirskyi Tikych river finds its source near the village of Frontivka in Orativ Raion, Vinnytsia Oblast. It joins the 157 km long Hnylyi Tikych to form the Tikych, which soon joins the Velyka Vys river to form the Syniukha river, which flows 110 km to join the Southern Bug The Southern Bug, also called Southern Buh (; ; ; or just ), and sometimes Boh River (; ),

Shield (geology)
A shield is a large area of exposed Precambrian Crystallinity, crystalline igneous rock, igneous and high-grade metamorphic rock, metamorphic rocks that form tectonics, tectonically stable areas. These rocks are older than 570 million years and sometimes date back to around 2 to 3.5 billion years. They have been little affected by tectonic events following the end of the Precambrian, and are relatively flat regions where mountain building, faulting, and other tectonic processes are minor, compared with the activity at their margins and between tectonic plates. Shields occur on all continents. Terminology The term shield cannot be used interchangeably with the term craton. However, shield can be used interchangeably with the term basement (geology), basement. The difference is that a craton describes a basement overlain by a sedimentary rock, sedimentary platform (geology), platform while shield only describes the basement. The term ''shield'', used to describe this type of ge ...
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