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Balagan-Tas
Balagan-Tas ( sah, Балаҕан Таас, russian: Балаган-Тас) is a cinder cone volcano in Russia. It was discovered by V.A. Zimin in 1939 and is one of the main features of the Moma Natural Park. Description This volcano is located in the Chersky Range, in the Moma River valley and is the only clearly Quaternary volcano in the area; the existence of another volcano active in the 1770s has not been confirmed. The supposed Indighirsky volcano may be actually Balagan-Tas. Its location has often been given incorrectly. Balagan-Tas is a volcanic cone with a crater of which little remains. It covers a surface area of . The crater is wide and deep, the cone is high and has a base diameter of . It may be considered a composite volcano. The volcano has generated three lava flows which cover a surface area of . They reach a thickness of . The volcano has erupted alkali basalts typical for rift zone volcanoes. Its composition has been characterized as hawaiite. Titanium d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moma River
The Moma (russian: Мома; sah, Муома) is a river in Yakutia in Russia, a right tributary of the Indigirka. The length of the river is , the area of its drainage basin is . The extinct cinder cone volcanoes Balagan-Tas and Uraga-Tas are some of the main features of the Moma Natural Park. Course The Moma originates from Lake Sisyktyah on the northern slope of the Ulakhan Chistay Range, the highest subrange of the Chersky Range.''Ulakhan Chistay'' / Great Soviet Encyclopedia; in 35 vols. / Ch. ed. Yu. S. Osipov. 2004—2017. The river flows in the wide intermontane basin separating the Ulakhan Chistay Range from the Moma Range in the north and flows into the Indigirka about from its mouth. There are black coal deposits in the river basin. The district centre – the village of Khonuu – is located at the mouth of the river. Etymology The name comes from the Evenki language, “мома” means "wood, timber, tree". This is the name for the rivers with steep, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moma Natural Park
Moma Natural Park or Moma Nature Park (russian: Момский природный парк, ''Momsky Pryrodny Park''; sah, Аан Айылгы, ''Aan Aiylgy'') is a protected area of the Momsko-Chersk Region of Yakutia in the upper part of the Moma River basin. Administratively the park is a part of the Moma District, Sakha Republic, Far Eastern Russia. The nearest city is Khonuu, served by Moma Airport, and the nearest village Sasyr. Attractions The park includes part of the mostly mountainous area of the Ulakhan-Chistay Range, featuring pristine ridges and lakes of environmental and aesthetic value. Visitors may find a whole array of educational and recreational purposes in the area. Some of the main features are: * Mount Pobeda (), rising in the Buordakh Massif, is the highest point of the Ulakhan-Chistay, as well as of the Chersky mountain system. Climbing routes of varying difficulty are marked —up to category 5A. *Moma River valley, featuring the extinct cinder cone vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chersky Range
The Chersky Range (, ) is a chain of mountains in northeastern Siberia between the Yana River and the Indigirka River. Administratively the area of the range belongs to the Sakha Republic, although a small section in the east is within Magadan Oblast. The highest peak in the range is tall Peak Pobeda (Chersky Range), Peak Pobeda, part of the Ulakhan-Chistay Range. The range also includes important places of traditional Yakut culture, such as Ynnakh Mountain ''(Mat'-Gora)'' and kigilyakh rock formations. The Moma Natural Park is a protected area located in the southern zone of the range. History At some time between 1633 and 1642 Poznik Ivanov ascended a tributary of the lower Lena, crossed the Verkhoyansk Range to the upper Yana and then crossed the Chersky Range to the Indigirka. The range was sighted in 1926 by Sergei Obruchev (Vladimir Obruchev's son) and named by the Russian Geographical Society after the Polish explorer and geographer Ivan Chersky (or Jan Czerski). Geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Long Islands
The De Long Islands ( rus, Острова Де-Лонга, r=Ostrova De-Longa; sah, Де Лоҥ Aрыылара, translit=De Loñ Arıılara) are an uninhabited archipelago often included as part of the New Siberian Islands, lying north east of Novaya Sibir. Geography This archipelago consists of Jeannette Island, Henrietta Island, Bennett Island, Vilkitsky Island and Zhokhov Island. These five islands have a total area of 228 km². Bennett Island is the largest island and it has also the archipelago's highest point at 426 m. These islands lie around 77°N, are partially covered by glaciers, and rise to peaks. In 1996, the total area of these islands covered by ice caps and glaciers was 80.6 km². This island group belongs to the Sakha (Yakutia) Republic administrative division of Russia. Geology Early Paleozoic, Middle Paleozoic, Cretaceous, and Neogene rocks have been mapped within the De Long Islands. The Early Paleozoic rocks are Cambrian and Ordovician sedimen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gakkel Ridge
The Gakkel Ridge (formerly known as the Nansen Cordillera and Arctic Mid-Ocean Ridge) is a mid-oceanic ridge, a divergent tectonic plate boundary between the North American Plate and the Eurasian Plate. It is located in the Eurasian Basin of the Arctic Ocean, between Greenland and Siberia, and has a length of about 1,800 kilometers (approximately 1,120 miles). Geologically, it connects the northern end of the Mid-Atlantic Ridge with the Laptev Sea Rift. The existence and approximate location of the Gakkel Ridge were predicted by Soviet polar explorer Yakov Yakovlevich Gakkel, and confirmed on Soviet expeditions in the Arctic around 1950. The Ridge is named after him, and the name was recognized in April 1987 by SCUFN (under that body's old name, the Sub-Committee on Geographical Names and Nomenclature of Ocean Bottom Features). The ridge is the slowest known spreading ridge on earth, with a rate of less than one centimeter per year. Until 1999, it was believed to be non-volcani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhyolite
Rhyolite ( ) is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture, but may be porphyritic, containing larger mineral crystals (phenocrysts) in an otherwise fine-grained groundmass. The mineral assemblage is predominantly quartz, sanidine, and plagioclase. It is the extrusive equivalent to granite. Rhyolitic magma is extremely viscous, due to its high silica content. This favors explosive eruptions over effusive eruptions, so this type of magma is more often erupted as pyroclastic rock than as lava flows. Rhyolitic ash-flow tuffs are among the most voluminous of continental igneous rock formations. Rhyolitic tuff has been extensively used for construction. Obsidian, which is rhyolitic volcanic glass, has been used for tools from prehistoric times to the present day because it can be shaped to an extremely sharp edge. Rhyolitic pumice finds use as an abrasive, in concrete, and as a soil amendment. Description Rhyolite i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Dome
In volcanology, a lava dome is a circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions on Earth are lava dome forming. The geochemistry of lava domes can vary from basalt (e.g. Semeru, 1946) to rhyolite (e.g. Chaiten, 2010) although the majority are of intermediate composition (such as Santiaguito, dacite-andesite, present day) The characteristic dome shape is attributed to high viscosity that prevents the lava from flowing very far. This high viscosity can be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast and easily break apart by further input of fluid lava, most of the preserved domes have high silica content and consist of rhyolite or dacite. Existence of lava domes has been suggested for some domed structures on the Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American Plate
The North American Plate is a tectonic plate covering most of North America, Cuba, the Bahamas, extreme northeastern Asia, and parts of Iceland and the Azores. With an area of , it is the Earth's second largest tectonic plate, behind the Pacific Plate (which borders the plate to the west). It extends eastward to the Mid-Atlantic Ridge and westward to the Chersky Range in eastern Siberia. The plate includes both continental and oceanic crust. The interior of the main continental landmass includes an extensive granitic core called a craton. Along most of the edges of this craton are fragments of crustal material called terranes, which are accreted to the craton by tectonic actions over a long span of time. It is thought that much of North America west of the Rocky Mountains is composed of such terranes. Boundaries The southern boundary with the Cocos Plate to the west and the Caribbean Plate to the east is a transform fault, represented by the Swan Islands Transform Fault unde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurasian Plate
The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and the area east of the Chersky Range in eastern Siberia. It also includes oceanic crust extending westward to the Mid-Atlantic Ridge and northward to the Gakkel Ridge. The eastern edge is a boundary with the North American Plate to the north and a boundary with the Philippine Sea Plate to the south and possibly with the Okhotsk Plate and the Amurian Plate. The southern edge is a boundary with the African Plate to the west, the Arabian Plate in the middle and the Indo-Australian Plate to the east. The western edge is a divergent boundary with the North American Plate forming the northernmost part of the Mid-Atlantic Ridge, which is straddled by Iceland. All volcanic eruptions in Iceland, such as the 1973 eruption of Eldfell, the 1783 eruptio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Chersky Range")
