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Aluchin (volcano)
Aluchin is a volcano along the Aluchin River in the Chukotka Autonomous Okrug of Russia. The volcano was discovered in 1956–1957 by G.K. Kleshchev. Description The volcano is formed by three cones, named Alpha, Beta and Gamma, which occur along a fissure. Alpha, the main cone, formed within a river valley. It is high and has a diameter of . A crater wide and deep caps the cone. Beta, a smaller cone formed by lava and scoria, grew on the southeastern side of Alpha. It ejected lava bombs with sizes of up to that landed in the surrounding valleys. Beta is partially degraded, high and has a wide crater. Gamma is formed by agglomerates. Because the poorly indurated agglomerates are subject to rapid erosion the cone's structure has been heavily degraded. It is high with no recognizable crater and a base size of . Volcanic activity has generated lava flows that fill a valley. These flows cover a surface area of and reach a length of . The total volume reached by the flows is , o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anyuy Range
The Anyuy Mountains (russian: Анюйский хребет; ''Anyuyskiy Khrebet''), also known as South Anyuy Range are a range of mountains in far north-eastern Russia. Administratively the range is part of the Chukotka Autonomous Okrug, Russia. The area of the range is largely uninhabited. Geography To the north rises the Chuvanay Range and to the northeast the Ilirney Range, on the other side of the Maly Anyuy River. The Anyuy Range is part of the East Siberian System of mountains and is one of the subranges of the Anadyr Highlands. To the east of the eastern end of the range rises the Shchuchy Range, stretching in a roughly southwestern direction, and to the south of the range rises the roughly parallel Oloy Range of the Kolyma Mountains. Although there are no glaciers in the range in present times, there is evidence of ancient glaciation. The Anyuy Range is drained by rivers Maly Anyuy, Bolshoy Anyuy, and Omolon. The highest point is high Blokhin Peak (Пик Блохин ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basalt
Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial planet, rocky planet or natural satellite, moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. For example, the bulk of the plains of volcanism on Venus, Venus, which cover ~80% of the surface, are basaltic; the lunar mare, lunar maria are plains of flood-basaltic lava flows; and basalt is a common rock on the surface of Mars. Molten basalt lava has a low viscosity due to its relatively low silica content (between 45% and 52%), resulting in rapidly moving lava flo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In Russia ...
This is a list of active and extinct volcanoes in Russia. European Russia Kamchatka Volcanoes of the Kamchatka Peninsula of the northwestern Pacific Ocean and the Russian Far East. Kuril Islands Volcanoes of the Kuril Islands, in the northwestern Pacific Ocean between the Kamchatka Peninsula and Japan. Other parts of Russia Example References {{Russia topics Russia Lists of coordinates Volcanoes Volcanoes A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluchin Horst
The Aluchin Horst (Aluchinskii Massif) is a mountainous geological formation in the Siberian Far East. It is located right below the Arctic Circle, close to the Baimka River, a left tributary of the Bolshoy Anyui River, about 180 km southwest of Bilibino. This horst belongs to the Chukotka Autonomous Okrug administrative division of Russia. There are very significant gold placers and platinum group minerals (PGM) in the Baimka basin, in the immediate vicinity of the Aluchin Horst. References * Geological map of the Aluchin Horst* Gold placer at the Aluchin Horst* Platinum group minerals (PGM) at the Aluchin Horst sites See also * Aluchin (volcano) Aluchin is a volcano along the Aluchin River in the Chukotka Autonomous Okrug of Russia. The volcano was discovered in 1956–1957 by G.K. Kleshchev. Description The volcano is formed by three cones, named Alpha, Beta and Gamma, which occur along ... Mountain ranges of Russia Landforms of Chukotka Autonomous Okrug Horst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plate Boundaries
Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large tectonic plates which have been slowly moving since about 3.4 billion years ago. The model builds on the concept of ''continental drift'', an idea developed during the first decades of the 20th century. Plate tectonics came to be generally accepted by geoscientists after seafloor spreading was validated in the mid to late 1960s. Earth's lithosphere, which is the rigid outermost shell of the planet (the crust and upper mantle), is broken into seven or eight major plates (depending on how they are defined) and many minor plates or "platelets". Where the plates meet, their relative motion determines the type of plate boundary: '' convergent'', '' divergent'', or ''transform''. Earthquakes, volcanic activity, mountain-building, and oceanic tren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anyuyskiy
Anyuyskiy (russian: Анюйский Вулкан; ''Annuyskiy Vulkan'') is an extinct volcano in the Anyuy Mountains, Chukotka Autonomous Okrug, Far Eastern Russia. It is formed by two systems: one is formed by long lava flows which disrupted the valley of the Monni River. Later, a volcanic cone formed, experiencing explosive activity and eventually extruding a long lava flow. The volcano erupted more than one cubic kilometre of lava. It was considered to have been active during the 14th and 18th centuries, but radiometric dating has shown ages of almost 250,000 years ago. The volcano is also known as Molodykh, Monni and Ustieva. Anyuyskiy was discovered in 1952 on aerial images. Geology Anyuyskiy is in the valley of the Monni River, in the southern Anyuy Mountains, part of the East Siberian System. Late Quaternary volcanic activity appears to be linked to tectonic activity in the area. A change in volcanic activity from linear vents to central vents has been noted. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Era
Common Era (CE) and Before the Common Era (BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the original Anno Domini (AD) and Before Christ (BC) notations used for the same calendar era. The two notation systems are numerically equivalent: " CE" and "AD " each describe the current year; "400 BCE" and "400 BC" are the same year. The expression traces back to 1615, when it first appeared in a book by Johannes Kepler as the la, annus aerae nostrae vulgaris (), and to 1635 in English as " Vulgar Era". The term "Common Era" can be found in English as early as 1708, and became more widely used in the mid-19th century by Jewish religious scholars. Since the later 20th century, BCE and CE have become popular in academic and scientific publications because BCE and CE are religiously neutral terms. They are used by others who wish to be sensit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devonian
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proterozoic
The Proterozoic () is a geological eon spanning the time interval from 2500 to 538.8million years ago. It is the most recent part of the Precambrian "supereon". It is also the longest eon of the Earth's geologic time scale, and it is subdivided into three geologic eras (from oldest to youngest): the Paleoproterozoic, Mesoproterozoic, and Neoproterozoic. The Proterozoic covers the time from the appearance of oxygen in Earth's atmosphere to just before the proliferation of complex life (such as trilobites or corals) on the Earth. The name ''Proterozoic'' combines two forms of ultimately Greek origin: meaning 'former, earlier', and , 'of life'. The well-identified events of this eon were the transition to an oxygenated atmosphere during the Paleoproterozoic; the evolution of eukaryotes; several glaciations, which produced the hypothesized Snowball Earth during the Cryogenian Period in the late Neoproterozoic Era; and the Ediacaran Period (635 to 538.8 Ma) which is characterize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
