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Tubutulik River
The Tubutulik River is a waterway in the U.S. state of Alaska. The long river is situated on the Seward Peninsula. It flows southeastwards to the Kwiniuk Inlet at the northwestern end of Norton Bay, southwest of Koyuk in the Bering Sea. Its Inuit name was reported as "Tubuktulik" in 1849 by Capt. Mikhail Dmitrievich Tebenkov of the Imperial Russian Navy. Exploration for placer gold occurred in the Council district area where the river valley is located, and in 1898, mining commenced. The production was substantial and ranked second only to that of Nome. Geography The river is located on the Seward Peninsula of northwestern Alaska. It rises from the southern flank of the Bendeleben Mountains. A geological fault was noted running from the Bendeleben Mountains to the east of the river's headwater. The long waterway flows generally parallel to the mountains whereas its tributaries flow perpendicular to the mountain range. Erosion is a common phenomenon in the river valley; th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eskimo–Aleut Languages
The Eskaleut (), Eskimo–Aleut or Inuit–Yupik–Unangan languages are a language family native to the northern portions of the North American continent and a small part of northeastern Asia. Languages in the family are indigenous to parts of what are now the United States (Alaska); Canada ( Inuit Nunangat including Nunavut, Northwest Territories (principally in the Inuvialuit Settlement Region), northern Quebec ( Nunavik), and northern Labrador (Nunatsiavut); Greenland; and the Russian Far East (Chukchi Peninsula). The language family is also known as ''Eskaleutian'', ''Eskaleutic'' or ''Inuit–Yupik–Unangan''. The Eskaleut language family is divided into two branches: the Eskimoan languages and the Aleut language. The Aleut branch consists of a single language, Aleut, spoken in the Aleutian Islands and the Pribilof Islands. Aleut is divided into several dialects. The Eskimoan languages are divided into two branches: the Yupik languages, spoken in western and southwestern A ... [...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] |
Conglomerate (geology)
Conglomerate () is a clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts. A conglomerate typically contains a matrix of finer-grained sediments, such as sand, silt, or clay, which fills the interstices between the clasts. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form by the consolidation and lithification of gravel. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. In terms of origin and depositional mechanisms, they are closely related to sandstones and exhibit many of the same types of sedimentary structures, e.g., tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and sedimentary rocks.'' In G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Granite
Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground. It is common in the continental crust of Earth, where it is found in igneous intrusions. These range in size from dikes only a few centimeters across to batholiths exposed over hundreds of square kilometers. Granite is typical of a larger family of ''granitic rocks'', or ''granitoids'', that are composed mostly of coarse-grained quartz and feldspars in varying proportions. These rocks are classified by the relative percentages of quartz, alkali feldspar, and plagioclase (the QAPF classification), with true granite representing granitic rocks rich in quartz and alkali feldspar. Most granitic rocks also contain mica or amphibole minerals, though a few (known as leucogranites) contain almost no dark minerals. Granite is nearly alway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Arctic
Northwest Territories (french: Territoires du Nord-Ouest) is a federal electoral district represented in the House of Commons of Canada. The electoral district covers the entire territory. This riding was created in 1962 from Mackenzie River riding. It was composed of the entire territory of the Northwest Territories. In 1979, the riding was divided into the ridings of Western Arctic and Nunatsiaq (later Nunavut). Following the creation of the territory of Nunavut in 1999, the riding of Western Arctic was made coterminous with the new Northwest Territories. After 1999, Western Arctic was an anomaly in that, unlike Nunavut and Yukon, it did not share the name of the territory with which it was coterminous. This did not change with subsequent representation orders because the electoral boundaries revision process did not affect the territories and the territorial riding names were specified in law. In 2014, at the behest of Western Arctic MP Dennis Bevington, the riding name w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caribou
Reindeer (in North American English, known as caribou if wild and ''reindeer'' if domesticated) are deer in the genus ''Rangifer''. For the last few decades, reindeer were assigned to one species, ''Rangifer tarandus'', with about 10 subspecies. A 2022 revision of the genus elevated five of the subspecies to species (see Taxonomy below). They have a circumpolar distribution and are native to the Arctic, sub-Arctic, tundra, boreal forest, and mountainous regions of northern Europe, Siberia, and North America. Reindeer occur in both migratory and sedentary populations, and their herd sizes vary greatly in different regions. The tundra subspecies are adapted for extreme cold, and some are adapted for long-distance migration. Reindeer vary greatly in size and color from the smallest species, the Svalbard reindeer (''R. t. platyrhynchus''), to the largest subspecies, Osborn's caribou (''R. t. osborni''). Although reindeer are quite numerous, some species and subspecies are in d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Salmon
''Oncorhynchus'' is a genus of fish in the family Salmonidae; it contains the Pacific salmon and Pacific trout. The name of the genus is derived from the Greek ὄγκος (ónkos, “lump, bend”) + ῥύγχος (rhúnkhos, “snout”), in reference to the hooked snout (the "kype") that the males develop during mating season. Range Salmon and trout with native ranges in waters draining to the Pacific Ocean are members of the genus. Their range extends from Beringia southwards, roughly to Taiwan in the west and Mexico to the east. In North America, some subspecies of '' O. clarkii'' are native in the Rocky Mountains and Great Basin, while others are native to the Rio Grande and western tributaries of the Mississippi River Basin which drain to the Gulf of Mexico, rather than to the Pacific. Several species of ''Oncorhynchus'' have been introduced into non-native waters around the globe, establishing self-sustaining wild populations. The six Pacific salmons of ''Oncor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caribou
Reindeer (in North American English, known as caribou if wild and ''reindeer'' if domesticated) are deer in the genus ''Rangifer''. For the last few decades, reindeer were assigned to one species, ''Rangifer tarandus'', with about 10 subspecies. A 2022 revision of the genus elevated five of the subspecies to species (see Taxonomy below). They have a circumpolar distribution and are native to the Arctic, sub-Arctic, tundra, boreal forest, and mountainous regions of northern Europe, Siberia, and North America. Reindeer occur in both migratory and sedentary populations, and their herd sizes vary greatly in different regions. The tundra subspecies are adapted for extreme cold, and some are adapted for long-distance migration. Reindeer vary greatly in size and color from the smallest species, the Svalbard reindeer (''R. t. platyrhynchus''), to the largest subspecies, Osborn's caribou (''R. t. osborni''). Although reindeer are quite numerous, some species and subspecies are in d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koyuk River
The Koyuk River (also spelled, Kuyuk) is a river on the Seward Peninsula of western Alaska, in the United States. The river originates in the interior of the peninsula, at the Lost Jim Lava Flow of the Bering Land Bridge National Preserve, where it flows southeast towards the mouth of Norton Bay on Norton Sound. The native village of Koyuk is located at its mouth. The two major tributaries are the Peace and Salmon rivers; other tributaries include Dime and Sweepstakes. Etymology Its Inuit named as Tebenkof Eskimos, reported by Captain Tebenkov (1852, map 2), IRN, as ''Kvyguk'' or ''Kvieguk''. The Western Union Telegraph Expedition spelled the name ''Koikpak'' ("big river"). The Seward map of 1867 gives ''Koipak'', and later as ''Kayuk'', ''Koyuk'', and ''Kuyuk''. The Kanguksuk is also known as the ''Left Fork of the Kviguk'' (Koyuk). The present spelling comes from Alfred Hulse Brooks', 1900 United States Geological Survey. Geography The Koyuk River, one of the largest in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kotzebue Sound
Kotzebue Sound (russian: Залив Коцебу) is an arm of the Chukchi Sea in the western region of the U.S. state of Alaska. It is on the north side of the Seward Peninsula and bounded on the east by the Baldwin Peninsula. It is long and wide. Kotzebue Sound is located in the transitional climate zone, which is characterized by long, cold winters and cool summers. The average low temperature during January is ; the average high during July is . Temperature extremes have been measured from to . Snowfall averages , with total precipitation of per year. Kotzebue Sound is ice-free from early July until early October. The towns of Kotzebue, Kiwalik and Deering are on the shores of Kotzebue Sound. Kotzebue Sound was explored and named in 1816 by Baltic German Lieutenant Otto von Kotzebue while searching for the Northeast Passage in the service of Russia. Fauna A wide variety of birdlife is apparent at Kotzebue Sound including the tufted puffin, black-throated diver and red- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golovnin Bay
Golovnin Bay (''Tasiq'' in Inupiaq) is a waterway in the U.S. state of Alaska. It is a part of Norton Sound. It is named in honor of Vasily Golovnin. Fish River empties into the bay. Situated on the Seward Peninsula, it is the only protected waterway south of Port Clarence Port Clarence is a small village now within the borough of Stockton-on-Tees and ceremonial county of County Durham, England. It is situated on the north bank of the River Tees, and hosts the northern end of the Middlesbrough Transporter Bri .... References {{coord, 64.41556, -162.95917, display=title Bays of Alaska Bodies of water of Nome Census Area, Alaska Bodies of water of Northwest Arctic Borough, Alaska Bodies of water of the Seward Peninsula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schist
Schist ( ) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes or plates. This texture (geology), texture reflects a high content of platy minerals, such as micas, talc, chlorite group, chlorite, or graphite. These are often interleaved with more granular minerals, such as feldspar or quartz. Schist typically forms during regional metamorphism accompanying the process of mountain building (orogeny) and usually reflects a medium Metamorphism#Metamorphic grades, grade of metamorphism. Schist can form from many different kinds of rocks, including sedimentary rocks such as mudstones and igneous rocks such as tuffs. Schist metamorphosed from mudstone is particularly common and is often very rich in mica (a ''mica schist''). Where the type of the original rock (the protolith) is discernible, the schist is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
