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Cordillera Sarmiento
The Cordillera Sarmiento is a mountain range located in the Chilean Patagonia to the west of Puerto Natales named after Pedro Sarmiento de Gamboa, who was a Spanish explorer who navigated the region's waterways between 1579 and 1580. It extends in north–south direction on the western shore of the Fjord of the Mountains and parallel to the Cordillera Riesco. The highest mountain in this range is ''La Dama Blanca'' (The White Lady), with an elevation of 1,941 m (6,368 feet), which is located at . It is a subrange of the Andes and has a number of small glaciers. Geography A natural continuation of the Southern Patagonian Ice Field, Cordillera de Sarmiento is a mountainous peninsula about long and wide. The range centers about the 52° South line of latitude, west of Puerto Natales. The main summits of the range are La Dama Blanca (), followed to the south by Cerro Trono () and Alas de Ángel (). Three more summits rise over , and many of the peaks are ice-covered towers or shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Range
A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have arisen from the same cause, usually an orogeny. Mountain ranges are formed by a variety of geological processes, but most of the significant ones on Earth are the result of plate tectonics. Mountain ranges are also found on many planetary mass objects in the Solar System and are likely a feature of most terrestrial planets. Mountain ranges are usually segmented by highlands or mountain passes and valleys. Individual mountains within the same mountain range do not necessarily have the same geologic structure or petrology. They may be a mix of different orogenic expressions and terranes, for example thrust sheets, uplifted blocks, fold mountains, and volcanic landforms resulting in a variety of rock types. Major ranges Most geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gondwana
Gondwana () was a large landmass, often referred to as a supercontinent, that formed during the late Neoproterozoic (about 550 million years ago) and began to break up during the Jurassic period (about 180 million years ago). The final stages of break-up, involving the separation of Antarctica from South America (forming the Drake Passage) and Australia, occurred during the Paleogene. Gondwana was not considered a supercontinent by the earliest definition, since the landmasses of Baltica, Laurentia, and Siberia were separated from it. To differentiate it from the Indian region of the same name (see ), it is also commonly called Gondwanaland. Gondwana was formed by the accretion of several cratons. Eventually, Gondwana became the largest piece of continental crust of the Palaeozoic Era, covering an area of about , about one-fifth of the Earth's surface. During the Carboniferous Period, it merged with Laurasia to form a larger supercontinent called Pangaea. Gondwana (and Pan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarmiento Channel
Sarmiento Channel is a principal Patagonia channel, which extends in a north–south direction. It begins with the Guia Narrows ('' Angostura Guía'') and is located in Magallanes y Antártica Chilena Region. The kawésqar people sailed its waters from around 6,000 years ago until end of 20th century, as they inhabited its coasts. The channel is named after Pedro Sarmiento de Gamboa, who was a Spanish explorer who navigated the region's waterways between 1579 and 1580. This elongated water passage begins immediately south of the Guía Narrows at and terminates at the southern tip of Victoria Pass at , where it joins to Smyth Channel. During the first 65 nautical miles, it runs in a general south-southeasterly direction, and is flanked by Chile mainland on the east and Esperanza, Vancouver and Piazzi islands on the west. Then it turns abruptly eastward for about 4 nmi, where the channel's name changes to Farquhar Pass. It then resumes its general SSE course, merging with Collin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Fitz Roy
Vice-Admiral Robert FitzRoy (5 July 1805 – 30 April 1865) was an English officer of the Royal Navy and a scientist. He achieved lasting fame as the captain of during Charles Darwin's famous voyage, FitzRoy's second expedition to Tierra del Fuego and the Southern Cone. FitzRoy was a pioneering meteorologist who made accurate daily weather predictions, which he called by a new name of his own invention: "forecasts". In 1854 he established what would later be called the Met Office, and created systems to get weather information to sailors and fishermen for their safety. He was an able surveyor and hydrographer. As Governor of New Zealand, serving from 1843 to 1845, he tried to protect the Māori from illegal land sales claimed by British settlers. Early life and career Robert FitzRoy was born at Ampton Hall, Ampton, Suffolk, England, into the upper echelons of the British aristocracy and a tradition of public service. Through his father, General Lord Charles FitzRoy, Rober ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Juan Ladrillero
Juan Ladrillero (b. c. 1490 in Moguer – 1559) was a 16th-century Spanish navigator and explorer who from 1557 to 1559 explored the coast of Chile from Valdivia (39° 48’ S) to the Barbara Channel (54° S, between Clarence Island and Santa Ines Island). He was the first to navigate the Strait of Magellan from its western entrance to its eastern and back again. Early career Ladrillero went to sea at an early age. In 1535, after having made eleven round voyages from Spain to the West Indies, he received a pilot's license from Sebastian Cabot. He piloted the fleet that brought Don Antonio de Mendoza to Mexico as viceroy, and in 1539-40 commanded a fleet of five sail, with which he discovered the Bahia de la Cruz and helped to found Buenaventura in Colombia. In 1539 he had commanded Hernando Cortés's ''San Lázaro'', carrying various goods from Tehuantepec to Panama. In 1545 he left for Quito, then moved to Lima. He spent several years in retirement on his encomienda in Chu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yaghan People
The Yahgan (also called Yagán, Yaghan, Yámana, Yamana or Tequenica) are a group of indigenous peoples in the Southern Cone. Their traditional territory includes the islands south of Isla Grande de Tierra del Fuego, extending their presence into Cape Horn, making them the world's southernmost human population. In the 19th century, the Yahgan were known in English as “Fuegians”. The term is now avoided as it can also refer to several other indigenous peoples of Tierra del Fuego, for example the Selk'nam. The Yahgan language, also known as Yámana, is considered a language isolate. Cristina Calderón (1928–2022), who was born on Navarino Island, Chile, was known as the last full-blooded Yahgan and last native speaker of the Yahgan language. Most Yahgans speak Spanish. The Yahgan were traditionally nomads and hunter-gatherers who traveled by canoe between islands to collect food. The men hunted sea lions and the women dove to collect shellfish. The Yahgan share some similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chert
Chert () is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a precipitation (chemistry), chemical precipitate or a diagenesis, diagenetic replacement, as in petrified wood. Chert is typically composed of the petrified remains of siliceous ooze, the biogenic sediment that covers large areas of the deep ocean floor, and which contains the silicon skeletal remains of diatoms, Dictyochales, silicoflagellates, and radiolarians. Precambrian cherts are notable for the presence of fossil cyanobacteria. In addition to Micropaleontology, microfossils, chert occasionally contains macrofossils. However, some chert is devoid of any fossils. Chert varies greatly in color (from white to black), but most often manifests as gray, brown, grayish brown and light green to rusty redW.L. Roberts, T.J. Campbell, G.R. Rapp Jr. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.Blatt, Harvey and Robert J. Tracy (1996) ''Petrology: Igneous, Sedimentary and Metamorphic'', 2nd ed., Freeman, pp. 281–292 Shale is characterized by its tendency to split into thin layers ( laminae) less than one centimeter in thickness. This property is called '' fissility''. Shale is the most common sedimentary rock. The term ''shale'' is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the more narrow sense of clay-rich fissile mudrock. Texture Shale typically exhibits varying degrees of fissility. Because of the parallel orientation of clay mineral flakes in shale, it breaks into thin layers, often splintery and usually parallel to the otherwise indistinguishable beddin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...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] |
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