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Shovel Creek (Alaska)
Shovel Creek is a waterway in the U.S. state of Alaska, near Nome. It flows into Solomon River from the west about from the coast. It heads in a divide about from the Casadepaga River and flows nearly southward to its junction with Solomon River. Although not a very long stream, it has a large drainage area and carries during ordinary seasons about of water. It has a gradient of about . Through the greater part of its course, it spreads over wide gravel bars. The bed rock of the Shovel Creek basin consists for the most part of limestones and calcareous mica schists. Near the head of the creek, there are some intrusions of greenstone. Mining operations in the Shovel Creek basin occurred at three small tributaries—Mystery, West, and Kasson creeks. History In the 1910s, the Shovel Creek Gold Dredging Company operated on Shovel Creek, about above the junction of the creek with the Solomon River. The dredge buckets had a capacity of . The ladder was constructed for digging t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterway
A waterway is any navigable body of water. Broad distinctions are useful to avoid ambiguity, and disambiguation will be of varying importance depending on the nuance of the equivalent word in other languages. A first distinction is necessary between maritime shipping routes and waterways used by inland water craft. Maritime shipping routes cross oceans and seas, and some lakes, where navigability is assumed, and no engineering is required, except to provide the draft for deep-sea shipping to approach seaports (channels), or to provide a short cut across an isthmus; this is the function of ship canals. Dredged channels in the sea are not usually described as waterways. There is an exception to this initial distinction, essentially for legal purposes, see under international waters. Where seaports are located inland, they are approached through a waterway that could be termed "inland" but in practice is generally referred to as a "maritime waterway" (examples Seine Maritime, Loir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., it borders the Canadian province of British Columbia and the Yukon territory to the east; it also shares a maritime border with the Russian Federation's Chukotka Autonomous Okrug to the west, just across the Bering Strait. To the north are the Chukchi and Beaufort Seas of the Arctic Ocean, while the Pacific Ocean lies to the south and southwest. Alaska is by far the largest U.S. state by area, comprising more total area than the next three largest states (Texas, California, and Montana) combined. It represents the seventh-largest subnational division in the world. It is the third-least populous and the most sparsely populated state, but by far the continent's most populous territory located mostly north of the 60th parallel, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nome, Alaska
Nome (; ik, Sitŋasuaq, ) is a city in the Nome Census Area in the Unorganized Borough of Alaska, United States. The city is located on the southern Seward Peninsula coast on Norton Sound of the Bering Sea. It had a population of 3,699 recorded in the 2020 census, up from 3,598 in 2010. Nome was incorporated on April 9, 1901, and was once the most-populous city in Alaska. Nome lies within the region of the Bering Straits Native Corporation, which is headquartered in Nome. The city of Nome also claims to be home to the world's largest gold pan, although this claim has been disputed by the Canadian city of Quesnel, British Columbia. In the winter of 1925, a diphtheria epidemic raged among Alaska Natives in the Nome area. Fierce territory-wide blizzard conditions prevented the delivery of a life-saving diphtheria antitoxin serum by airplane from Anchorage. A relay of dog sled teams was organized to deliver the serum. Today, the Iditarod Dog Sled Race follows the same route they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solomon River (Alaska)
Solomon River is a waterway in the U.S. state of Alaska, near Nome. Geography It heads close to the Casadepaga River Casadepaga River (also Koshotok and Koksuktapaga) ( Inupiaq: ''Qaqsruqtaq'') is a waterway in the U.S. state of Alaska, near Nome. It is the largest southern branch of the Niukluk River. It has a length of about and a general northeasterly cours ..., from which it is separated by a low divide, and, flowing southward for , empties into Port Safety Lagoon about east of Nome. The placer mines of the region are accessible from the settlements of Solomon and Dickson, at the mouth of the river. Dickson is the terminus of the Council City and Solomon River Railroad. Solomon River discharges into the inlet of Port Safety Lagoon. For above its mouth, Solomon River flows across the coastal plain in a broad trench. Its gradient here probably does not exceed to the mile. Above the coastal plain, the river occupies a comparatively broad valley and the gradient increase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Casadepaga River
Casadepaga River (also Koshotok and Koksuktapaga) ( Inupiaq: ''Qaqsruqtaq'') is a waterway in the U.S. state of Alaska, near Nome. It is the largest southern branch of the Niukluk River. It has a length of about and a general northeasterly course. Geography The gradient of this river does not exceed to the mile. From its mouth to a point within of the head of its longest tributary, the whole fall is not more than . The drainage area is large and the stream is navigable for small boats and canoes for a distance of about . The upland in which the Casadepaga Valley is incised ranges in elevation from . The bed rock of the whole basin consists of the limestones and schists of the Nome group, including many veins and stringers of quartz, some of which are known to be auriferous (gold-bearing). The river occupies a broad and deeply gravel-filled valley, in the floor of which the stream bed is trenched to a depth of , leaving well-marked gravel terraces and benches through nearly the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcareous
Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adjectival term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart. The term also applies to the calcium carbonate tests of often more or less microscopic Foraminifera. Not all tests are calcareous; diatoms and radiolaria have siliceous tests. The molluscs are calcareous, as are calcareous sponges ( Porifera), that have spicules which are made of calcium carbonate. In botany ''Calcareous grassland'' is a form of grassland characteristic of soils containing much calcium carbonate from underlying chalk or limestone rock. In medicine The term is used in pathology, for example i ... [...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] |
Trommel
A trommel screen, also known as a rotary screen, is a mechanical screening machine used to separate materials, mainly in the mineral and solid-waste processing industries.Stessel et al. 1996, pp. 558-568. It consists of a perforated cylindrical drum that is normally elevated at an angle at the feed end. Physical size separation is achieved as the feed material spirals down the rotating drum, where the undersized material smaller than the screen apertures passes through the screen, while the oversized material exits at the other end of the drum.Chen, Y.S. et al. 2010, pp. 1214-1221. Summary Trommel screens can be used in a variety of applications such as classification of solid waste and recovery of valuable minerals from raw materials. Trommels come in many designs such as concentric screens, series or parallel arrangement and each component has a few configurations. However depending on the application required, trommels have several advantages and limitations over other scree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivers Of The Seward Peninsula
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. Rivers are part of the water cycle. Water generally collects in a river from precipitation through a drainage basin from surface runoff and other sources such as groundwater recharge, springs, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivers Of Alaska
This is a List of rivers in Alaska, which are at least fifth-order according to the Strahler method of stream classification, and an incomplete list of otherwise-notable rivers and streams. Alaska has more than 12,000 rivers, and thousands more streams and creeks. According to United States Geological Survey Geographic Names Information System, Alaska has about 9,728 officially named rivers, creeks, and streams. The length of the river is given if it is available from the United States Geological Survey Geographic Names Information System (GNIS). By drainage basin This list is arranged by drainage basin, with respective tributaries ordered from mouth to source, and indented under their downstream parent's name. Arctic Ocean *Firth River – * Kongakut River – * Aichilik River – * Jago River – * Okpilak River – * Hulahula River – * Sadlerochit River – *Canning River – ** Marsh Fork Canning River – * Shaviovik River – ** Kavik River – * Kadleroshili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivers Of Nome Census Area, Alaska
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. Rivers are part of the water cycle. Water generally collects in a river from precipitation through a drainage basin from surface runoff and other sources such as groundwater recharge, springs, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
