|
Zavodovski
Zavodovski Island is an uninhabited volcanic island in the Traversay Islands subgroup of the South Sandwich Islands, which are located southeast of South Georgia in the South Atlantic Ocean. Zavodovski is the northernmost of the South Sandwich Islands and consists of one major stratovolcano, Mount Curry, which is surrounded to the east by a plain formed by lava flows. Mount Curry has a fumarolically active crater on the southwestern side, which also bears traces of a sector collapse. An eruption occurred in 2016. The island was officially discovered in December 1819 by Thaddeus von Bellingshausen. The largest penguin colony on Earth with over a million breeding pairs is situated on Zavodovski. It consists mostly of chinstrap penguins, although other seabirds and penguin species breed on the island as well. Early explorers noted the bad smell of the island, which is reflected in numerous placenames. Geography and geomorphology Zavodovski is the northernmost of the South S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Sandwich Islands
The South Sandwich Islands () are a chain of uninhabited volcanic islands in the South Atlantic Ocean. They are administered as part of the British Overseas Territory of South Georgia and the South Sandwich Islands. The chain lies in the sub-Antarctic region, about southeast of South Georgia and northeast from the tip of the Antarctic Peninsula. The archipelago comprises 11 main islands forming an island arc running north–south, the largest being Montagu at . It is divided into four groups, from north to south: The Traversay, Candlemas and Central Islands ( Saunders, Montagu, and Bristol), and Southern Thule. The archipelago is prone to violent earthquakes. Over the previous century, nine M 7+ earthquakes have occurred here, the most recent being the M 8.1 in August 2021. None of these earthquakes are known to have caused fatalities due to their remote location. History The southern eight islands of the South Sandwich Islands were discovered by Captain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traversay Islands
The Traversay Islands () are a group of three islands— Zavodovski, Leskov and Visokoi—at the northern end of the South Sandwich Islands in the South Atlantic Ocean. History The group was discovered in November 1819 by a Russian expedition under Bellingshausen, who named them for Jean-Baptiste Prevost de Sansac, Marquis de Traversay (1754–1831), a French naval officer who joined the Russian navy in 1791, at the request of an émigré Frenchman in Russian service, admiral Nassau-Siegen. He was Minister of Naval Affairs at Saint Petersburg, 1809–28, and chief promoter of Bellingshausen's Antarctic voyage. The name was previously transliterated as Traverse because it was incorrectly thought that the man commemorated was a Russian. Geography Zavodovski Island () lies southeast of South Georgia Island. It is the northernmost of the South Sandwich Islands and the nearest to South Georgia. The island is approximately across with a peak elevation of above sea level. The s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Curry
Mount Asphyxia, also known as Mount Curry, is a prominent volcanic cone reaching to , forming the summit of Zavodovski Island, northernmost of the South Sandwich Islands. Description One of the names of the volcano refers to the suffocating fumes experienced on the island; volcanic fumes spew from the mountain and to this is added the stench of penguin guano. The fumes can indeed suffocate a visitor to the island. These qualities have given names to a number of Zavodovski Island's other features. Thus changing the way the penguins adapted to the Island for all could be known the penguins have started to change and grow The volcano erupted in March 2016; by July, between one third and one half of the island was covered in ash, putting the penguin colonies at risk. See also * List of volcanoes in South Sandwich Islands This is a list of active and extinct volcanoes in the South Sandwich Islands. References {{DEFAULTSORT:Volcanoes in South Sandwich Islands South Sandwi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaddeus Von Bellingshausen
Faddey Faddeyevich Bellingshausen or Fabian Gottlieb Benjamin von Bellingshausen ( – ) was a Russian cartographer, explorer, and naval officer of Baltic German descent, who attained the rank of admiral. He participated in the first Russian circumnavigation of the globe, and subsequently became a leader of another circumnavigation expedition that discovered the continent of Antarctica. Like Otto von Kotzebue and Adam Johann von Krusenstern, Bellingshausen belonged to a cohort of prominent Baltic German navigators which helped Russia launch its naval expeditions. Bellingshausen was born on the island of Saaremaa (Ösel), to the . He started his service in the Russian Baltic Fleet, and after distinguishing himself joined the first Russian circumnavigation of the Earth in 1803–1806, serving on the merchant ship ''Nadezhda'' under the captaincy of Adam Johann von Krusenstern. After the journey, he published a collection of maps of the newly explored areas and islands of the Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visokoi Island
Visokoi Island is an uninhabited volcanic island and one the three Traversay Islands that constitute a subgroup of the South Sandwich Islands, in the Southern Ocean. Visokoi consists of one major volcano, Mount Hodson, whose height is usually given as . The mountain is mostly covered by glaciers, except for several low areas on the coast like the northern Finger Point and eastern Irving Point. Several parasitic vents are found especially on the eastern side, and one vent close to Finger Point is still hot. Eruptions were reported in 1830, 1927 and 1930, and a large landslide took place during historical time. Geography and geomorphology Visokoi is one of the South Sandwich Islands, which lie southeast of South Georgia in the Southern Ocean and extend over a distance of in north-south direction. Leskov Island is west and Zavodovski Island north from Visokoi; together they makes up the Traversay Islands subgroup of the South Sandwich Islands. Icebergs occur in the surroun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Georgia And The South Sandwich Islands
South Georgia and the South Sandwich Islands (SGSSI) is a British Overseas Territory in the southern Atlantic Ocean. It is a remote and inhospitable collection of islands, consisting of South Georgia and a chain of smaller islands known as the South Sandwich Islands. South Georgia is long and wide and is by far the largest island in the territory. The South Sandwich Islands lie about southeast of South Georgia. The territory's total land area is . The Falkland Islands are about west from its nearest point. The South Sandwich Islands are uninhabited, and a very small non-permanent population resides on South Georgia. There are no scheduled passenger flights or ferries to or from the territory, although visits by cruise liners to South Georgia are increasingly popular, with several thousand visitors each summer. The United Kingdom claimed sovereignty over South Georgia in 1775 and the South Sandwich Islands in 1908. The territory of "South Georgia and the South Sandwich Islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leskov Island
Leskov Island is one of the three Traversay Islands that form a subgroup of the South Sandwich Islands, in the Southern Ocean. The island is named after Russian sailor Arcady Leskov. It is a semicircular high eroded volcano with a large bay on its eastern side. Leskov Island is almost entirely surrounded by cliffs and has a surface area of . Volcanic rocks form tuffs and lava and consist almost entirely of andesite. There are no known historical eruptions, but there is widespread fumarolic activity which has varied over time. Mosses and liverworts grow next to the fumaroles, but this vegetation also occurs away from the vents. Several seabirds have been observed nesting on the island. Geography and geomorphology The South Sandwich Islands in the Southern Ocean, which include Leskov Island, lie at the eastern margin of the Scotia Sea and were discovered in 1775 by James Cook. The islands have had little human presence, with only sporadic research efforts during the 20th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinstrap Penguin
The chinstrap penguin (''Pygoscelis antarcticus'') is a species of penguin that inhabits a variety of islands and shores in the Southern Pacific and the Antarctic Oceans. Its name stems from the narrow black band under its head, which makes it appear as if it were wearing a black helmet. Other common names include ringed penguin, bearded penguin, and stonecracker penguin, due to its loud, harsh call. Taxonomy This species was originally given the scientific name ''Aptenodytes antarctica'' by Johann Reinhold Forster in 1781, thereby placing it in the same genus as the king and emperor penguins. In 1990, Graham Turbott transferred this species into the genus ''Pygoscelis'', together with the Adélie and gentoo penguins. This gave it the new name ''P. antarctica''. However, this is an orthographic error due to the disagreement in Latin grammar between ''antarctica'' and its assigned genus. The corrected form, ''P. antarcticus'', is the currently accepted name for this species. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iceberg
An iceberg is a piece of fresh water ice more than long that has broken off a glacier or an ice shelf and is floating freely in open water. Smaller chunks of floating glacially derived ice are called "growlers" or "bergy bits". Much of an iceberg is below the water's surface, which led to the expression " tip of the iceberg" to illustrate a small part of a larger unseen issue. Icebergs are considered a serious maritime hazard. Icebergs vary considerably in size and shape. Icebergs that calve from glaciers in Greenland are often irregularly shaped while Antarctic ice shelves often produce large tabular (table top) icebergs. The largest iceberg in recent history, named B-15, was measured at nearly in 2000. The largest iceberg on record was an Antarctic tabular iceberg measuring sighted west of Scott Island, in the South Pacific Ocean, by the USS ''Glacier'' on November 12, 1956. This iceberg was larger than Belgium. Etymology The word ''iceberg'' is a partial loan tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Ice
Sea ice arises as seawater freezes. Because ice is less density, dense than water, it floats on the ocean's surface (as does fresh water ice). Sea ice covers about 7% of the Earth's surface and about 12% of the world's oceans. Much of the world's sea ice is enclosed within the polar ice packs in the Earth's polar regions: the Arctic ice pack of the Arctic Ocean and the Antarctic ice pack of the Southern Ocean. Polar packs undergo a significant yearly cycling in surface extent, a natural process upon which depends the Arctic ecology, including the Arctic sea ice ecology and history, ocean's ecosystems. Due to the action of winds, currents and temperature fluctuations, sea ice is very dynamic, leading to a wide variety of ice types and features. Sea ice may be contrasted with icebergs, which are chunks of ice shelf, ice shelves or glaciers that Ice calving, calve into the ocean. Depending on location, sea ice expanses may also incorporate icebergs. General features and dynamics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitic Vent
A parasitic cone (also adventive cone, satellite cone, satellitic cone or lateral cone) is the cone-shaped accumulation of volcanic material not part of the central vent of a volcano. It forms from eruptions from fractures on the flank of the volcano. These fractures occur because the flank of the volcano is unstable. Eventually, the fractures reach the magma chamber and generate eruptions called flank eruptions, which, in turn, produce a parasitic cone. A parasitic cone can also be formed from a dike or sill cutting up to the surface from the central magma chamber in an area different from the central vent. A peculiar example of multiple parasitic cones is Jeju Island in South Korea. Jeju Island features 368 "oreums" (Korean: ; "mount"), which lie in a roughly lateral line on either side of the island's central dormant shield volcano Hallasan. See also * Volcanic crater A volcanic crater is an approximately circular depression in the ground caused by volcanic activit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embayment
A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a ''gulf'', ''sea'', ''sound'', or ''bight''. A ''cove'' is a small, circular bay with a narrow entrance. A ''fjord'' is an elongated bay formed by glacial action. The term ''embayment'' is also used for , such as extinct bays or freshwater environments. A bay can be the estuary of a river, such as the Chesapeake Bay, an estuary of the Susquehanna River. Bays may also be nested within each other; for example, James Bay is an arm of Hudson Bay in northeastern Canada. Some large bays, such as the Bay of Bengal and Hudson Bay, have varied marine geology. The land surrounding a bay often reduces the strength of winds and blocks waves. Bays may have as wide a variety of shoreline characteristics as other shorelines. In some cases, bays have beaches, which "are usually characterized by a steep upper foreshore wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
