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D'Entrecasteaux Islands
D'Entrecasteaux Islands () are situated near the eastern tip of New Guinea in the Solomon Sea in Milne Bay Province of Papua New Guinea. The group spans a distance of , has a total land area of approximately and is separated from the Papua New Guinea mainland by the wide Ward Hunt Strait in the north and the wide Goschen Strait in the south. D'Entrecasteaux Islands show signs of volcanism. People The inhabitants of D'Entrecasteaux Islands are indigenous subsistence horticulturalists living in small, traditional settlements. People of this area produced and traded clay pots as well as participated in the Kula exchange of shell valuables, travelling widely to other islands on sea-going sailing canoes. During the more recent past, people harvested copra, trochus and pearl-shells and some timber for cash. Alluvial gold mining was once important and in recent years the area has been subject to mineral exploration. Description The three principal islands, from northwest to sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceania
Oceania (, , ) is a region, geographical region that includes Australasia, Melanesia, Micronesia, and Polynesia. Spanning the Eastern Hemisphere, Eastern and Western Hemisphere, Western hemispheres, Oceania is estimated to have a land area of and a population of around 44.5 million as of 2021. When compared with (and sometimes described as being one of) the continents, the region of Oceania is the smallest in land area and the list of continents and continental subregions by population, second least populated after Antarctica. Its major population centres are Sydney, Melbourne, Brisbane, Perth, Auckland, Adelaide, Honolulu, and Christchurch. Oceania has a diverse mix of economies from the developed country, highly developed and globally competitive market economy, financial markets of Australia, French Polynesia, Hawaii, Hawaii, New Caledonia, and New Zealand, which rank high in quality of life and Human Development Index, to the much least developed countries, less developed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goodenough Island
Goodenough Island in the Solomon Sea, also known as Nidula Island, is the westernmost of the three large islands of the D'Entrecasteaux Islands in Milne Bay Province of Papua New Guinea. It lies to the east of mainland New Guinea and southwest of the Trobriand Islands. It is roughly circular in shape, measuring with an area of and a shoreline of . From a coastal belt varying in width from in width, the island rises sharply to the summit of Mount Vineuo, above sea level, making it one of the most precipitous islands in the world. The small outlier Wagifa Island lies to the south-east of the island, and is included within Goodenough's administration. Climate and vegetation Like much of New Guinea, the climate is tropical with high temperatures and humidity throughout the year. The northwest monsoon season lasts from December to March and brings sudden rain squalls. From May to October southeasterly winds are cooler and more gentle. Tropical cyclones are infrequent. Rainf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antoine Bruni D'Entrecasteaux
Antoine Raymond Joseph de Bruni, chevalier d'Entrecasteaux () (8 November 1737 – 21 July 1793) was a French naval officer, explorer and colonial governor. He is perhaps best known for his exploration of the Australian coast in 1792, while searching for the La Pérouse expedition. Antoine Bruni d'Entrecasteaux is commonly referred to simply as Bruni d'Entrecasteaux or Bruny d'Entrecasteaux, which is a compound surname (derived from his father's surname, Bruni and the family's origins in Entrecasteaux). Early career Bruni d'Entrecasteaux was born to Dorothée de Lestang-Parade and Jean Baptiste Bruny, at Aix-en-Provence in 1739. His father was a member of the '' Parlement'' of Provence. Antoine Bruni d'Entrecasteaux was educated at a Jesuit school and reportedly intended to become a priest in the Society of Jesus, but his father intervened and enlisted him in the French Navy in 1754. In the action that secured the Balearic Islands for Spain (and resulted in the execution o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermal Ionization Mass Spectrometry
Thermal ionization mass spectrometry (TIMS) is also known as surface ionization and is a highly sensitive isotope mass spectrometry characterization technique. The isotopic ratios of radionuclides are used to get an accurate measurement for the elemental analysis of a sample. Singly charged ions of the sample are formed by the thermal ionization effect. A chemically purified liquid sample is placed on a metal filament which is then heated to evaporate the solvent. The removal of an electron from the purified sample is consequently achieved by heating the filament enough to release an electron, which then ionizes the atoms of the sample. TIMS utilizes a magnetic sector mass analyzer to separate the ions based on their mass to charge ratio. The ions gain velocity by an electrical potential gradient and are focused into a beam by electrostatic lenses. The ion beam then passes through the magnetic field of the electromagnet where it is partitioned into separate ion beams based on the io ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eclogite
Eclogite () is a metamorphic rock containing garnet (almandine-pyrope) hosted in a matrix of sodium-rich pyroxene (omphacite). Accessory minerals include kyanite, rutile, quartz, lawsonite, coesite, amphibole, phengite, paragonite, zoisite, dolomite, corundum and, rarely, diamond. The chemistry of primary and accessory minerals is used to classify three types of eclogite (A, B, and C). The broad range of eclogitic compositions has led a longstanding debate on the origin of eclogite xenoliths as subducted, altered oceanic crust. Origins Eclogites typically result from high to ultrahigh pressure metamorphism of mafic rock at low thermal gradients of < as it is subducted to the lower crust to depths in a subduction zone. Class ...
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Plate Tectonics
Plate tectonics (from the la, label=Late Latin, tectonicus, from the grc, τεκτονικός, lit=pertaining to building) is the generally accepted scientific theory that considers the Earth's lithosphere to comprise a number of large tectonic plates which have been slowly moving since about 3.4 billion years ago. The model builds on the concept of ''continental drift'', an idea developed during the first decades of the 20th century. Plate tectonics came to be generally accepted by geoscientists after seafloor spreading was validated in the mid to late 1960s. Earth's lithosphere, which is the rigid outermost shell of the planet (the crust and upper mantle), is broken into seven or eight major plates (depending on how they are defined) and many minor plates or "platelets". Where the plates meet, their relative motion determines the type of plate boundary: '' convergent'', '' divergent'', or ''transform''. Earthquakes, volcanic activity, mountain-building, and oceanic tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018. Etymology The term ''caldera'' comes from Spanish language, S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geothermal (geology)
Geothermal gradient is the rate of temperature change with respect to increasing depth in Earth's interior. As a general rule, the crust temperature rises with depth due to the heat flow from the much hotter mantle; away from tectonic plate boundaries, temperature rises in about 25–30 °C/km (72–87 °F/mi) of depth near the surface in most of the world. However, in some cases the temperature may drop with increasing depth, especially near the surface, a phenomenon known as ''inverse'' or ''negative'' geothermal gradient. The effects of weather, sun, and season only reach a depth of approximately 10-20 metres. Strictly speaking, ''geo''-thermal necessarily refers to Earth but the concept may be applied to other planets. In SI units, the geothermal gradient is expressed as °C/km, K/km, or mK/m. These are all equivalent. Earth's internal heat comes from a combination of residual heat from planetary accretion, heat produced through radioactive decay, latent hea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Vineuo
Mount Vineuo, also known as Mount Oiautukekea, is a mountain on Goodenough Island, Papua New Guinea. The mountain is above sea level."Goodenough High Point, Papua New Guinea" Peakbagger.com. Retrieved 2012-01-12. The mountain is the highest peak in the . 
See also * List of Ultras of Oceania * < ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John James Wild
John James Wild (born Jean Jacques Wild; 1824 – 3 June 1900) was a Swiss linguist, oceanographer and a natural history illustrator and lithographer, whose images were noted for their precision and clarity. He participated in the Challenger expedition of 1872–76. In 1881 he emigrated to Australia, where he contributed to Frederick McCoy's ''Prodromus of the Zoology of Victoria''. Detailed biography Wild was born in Zurich, Switzerland, in 1824. Wild met his wife, Elizabeth Ellen Mullin, while teaching languages in Belfast, Ireland. Wild joined the 1872–1876 ''Challenger'' expedition as official artist and secretary. This expedition, carried out by the Royal Society, spent four years surveying the oceans. Equipped with a dark room aboard HMS ''Challenger'', photographers were able to develop and print images soon after they were taken. This expedition is thought to have been the first to make use of photography as well as the services of an artist. Wild's contribution to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Challenger Expedition
The ''Challenger'' expedition of 1872–1876 was a scientific program that made many discoveries to lay the foundation of oceanography. The expedition was named after the naval vessel that undertook the trip, . The expedition, initiated by William Benjamin Carpenter, was placed under the scientific supervision of Sir Charles Wyville Thomson—of the University of Edinburgh and Merchiston Castle School—assisted by five other scientists, including Sir John Murray, a secretary-artist and a photographer. The Royal Society of London obtained the use of ''Challenger'' from the Royal Navy and in 1872 modified the ship for scientific tasks, equipping it with separate laboratories for natural history and chemistry. The expedition, led by Captain George Nares, sailed from Portsmouth, England, on 21 December 1872. Other naval officers included Commander John Maclear. – pages 19 and 20 list the civilian staff and naval officers and crew, along with changes that took place during the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dobu Island
Dobu Island is an island, part of D'Entrecasteaux Islands in Papua New Guinea. It is located south of Fergusson Island and north of Normanby Island. It is currently administered by Dobu Rural LLG. The people of Dobu were the subject of a seminal anthropological study by Reo Fortune. He described the Dobuan character as "paranoid", obsessed with black magic, and as having extremely unusual attitudes toward sex and violence. Fortune's account was reiterated by Ruth Benedict in her popular work ''Patterns of Culture''. However, many later anthropologists expressed skepticism.Ann Chowning, review of Fortune's ''Sorcerers of Dobu'', ''American Anthropologist'', New Series, Vol. 66, No. 2 (Apr., 1964), pp. 455-457 Fortune's analysis was significantly challenged by Susanne Kuehling Susanne Kuehling is a scholar of anthropology and ethnology. She currently works at the University of Regina. Career Kuehling is interested in the study of small matrilinear and matrilocal societies. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
