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Dominican Amber
Dominican amber is amber from the Dominican Republic derived from resin of the extinct tree '' Hymenaea protera''. Dominican amber differentiates itself from Baltic amber by being nearly always transparent, and it has a higher number of fossil inclusions. This has enabled the detailed reconstruction of the ecosystem of a long-vanished tropical forest.George Poinar, Jr. and Roberta Poinar, 1999. ''The Amber Forest: A Reconstruction of a Vanished World'', (Princeton University Press) Age A study in the early 1990s returned a date up to 40 million years old. However, according to Poinar, Dominican amber dates from Oligocene to Miocene, thus about 25 million years old. The oldest, and hardest of this amber comes from the mountain region north of Santiago. The ''La Cumbre'', ''La Toca'', ''Palo Quemado'', ''La Bucara'', and ''Los Cacaos'' mining sites in the ''Cordillera Septentrional'' not far from Santiago. Amber has also been found in the south-eastern Bayaguana/Sabana de la Mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ant In Amber1
Ants are Eusociality, eusocial insects of the Family (biology), family Formicidae and, along with the related wasps and bees, belong to the Taxonomy (biology), order Hymenoptera. Ants evolved from Vespoidea, vespoid wasp ancestors in the Cretaceous period. More than 13,800 of an estimated total of 22,000 species have been classified. They are easily identified by their geniculate (elbowed) Antenna (biology), antennae and the distinctive node-like structure that forms their slender waists. Ants form Ant colony, colonies that range in size from a few dozen predatory individuals living in small natural cavities to highly organised colonies that may occupy large territories and consist of millions of individuals. Larger colonies consist of various castes of sterile, wingless females, most of which are workers (ergates), as well as soldiers (dinergates) and other specialised groups. Nearly all ant colonies also have some fertile males called "drones" and one or more fertile females ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Delta
A river delta is a landform shaped like a triangle, created by deposition of sediment that is carried by a river and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment. It is so named because its triangle shape resembles the Greek letter Delta. The size and shape of a delta is controlled by the balance between watershed processes that supply sediment, and receiving basin processes that redistribute, sequester, and export that sediment. The size, geometry, and location of the receiving basin also plays an important role in delta evolution. River deltas are important in human civilization, as they are major agricultural production centers and population centers. They can provide coastline defense and can impact drinking water supply. They are also ecologically important, with different species' assemblages depending on their landscape posit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odontomachus Spinifer SMNSDO2215 Profile
''Odontomachus'' is a genus of ants commonly called trap-jaw ants found in the tropics and subtropics throughout the world. Overview Commonly known as trap-jaw ants, species in ''Odontomachus'' have a pair of large, straight mandibles capable of opening 180°. These jaws are locked in place by an internal mechanism, and can snap shut on prey or objects when sensory hairs on the inside of the mandibles are touched. The mandibles are powerful and fast, giving the ant its common name. The mandibles either kill or maim the prey, allowing the ant to bring it back to the nest. ''Odontomachus'' ants can simply lock and snap their jaws again if one bite is not enough, or to cut off bits of larger food. The mandibles also permit slow and fine movements for other tasks such as nest building and care of larvae. The ants were also observed to use their jaws as a catapult to eject intruders or fling themselves backwards to escape a threat. The larvae of trap-jaw ants are remarkable in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anochetus Intermedius BMNHP-II33 01
''Anochetus'' is a genus of small, carnivorous ants found in the tropics and subtropics throughout the world. This genus is present in both the Old and New World and is certainly native to all continents except Antarctica and Europe. In Europe only a single species, ''Anochetus ghilianii'', has been found, and it is not certain it is native to its European range (Province of Cadiz and Gibraltar). However ''A. ghilianii'' is native to Morocco. ''Anochetus'' is of some note due to it being one of the relatively few genera that possess ''trap-jaws'', or specialized long mandibles that have a rapid closing mechanism. However, it is the only other genus, other than ''Odontomachus'' that uses the mandibles for predator evasion as well as prey capture. Species *'' Anochetus africanus'' (Mayr, 1865) *'' Anochetus agilis'' Emery, 1901 *'' Anochetus alae'' Shattuck & Slipinska, 2012 *'' Anochetus altisquamis'' Mayr, 1887 *†''Anochetus ambiguus'' De Andrade, 1994 *'' Anochetus angolens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santo Domingo
, total_type = Total , population_density_km2 = auto , timezone = AST (UTC −4) , area_code_type = Area codes , area_code = 809, 829, 849 , postal_code_type = Postal codes , postal_code = 10100–10699 ( Distrito Nacional) , website Ayuntamiento del Distrito Nacional Santo Domingo ( meaning " Saint Dominic"), once known as Santo Domingo de Guzmán and Ciudad Trujillo, is the capital and largest city of the Dominican Republic and the largest metropolitan area in the Caribbean by population. As of 2022, the city and immediate surrounding area (the Distrito Nacional) had a population of 1,484,789, while the total population is 2,995,211 when including Greater Santo Domingo (the " metropolitan area"). The city is coterminous with the boundaries of the Distrito Nacional ("D.N.", "National District"), itself bordered on three sides by Santo Domingo Province. Founded by the Spanish in 1496, on the east bank of the Ozama River and then moved by Nicolás de Ovando ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Felipe De Puerto Plata
Puerto Plata, officially known as San Felipe de Puerto Plata, is the third-largest city in the Dominican Republic, and capital of the province of Puerto Plata. The city is a trading port. Puerto Plata has resorts such as Playa Dorada and Costa Dorada, which are located east of the city proper. There are 100,000 hotel beds in the city. The first aerial tramway of the Caribbean is located in Puerto Plata, in which visitors can ride up to the Pico Isabel de Torres, a 793-meter (2600-foot) high mountain within the city. The fortification Fortaleza San Felipe, which was built in the 16th century and served as a prison under Rafael Trujillo's dictatorship, lies close to the port of Puerta Plata. The Amber Museum is also a well-known attraction in this city. La Isabela, a settlement built by Christopher Columbus, is located near Puerto Plata. In April 1563, the Spanish settlement became notorious when the English slave trader Sir John Hawkins brought 400 people he had abducted from Sie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Pit
A bell pit is a primitive method of mining coal, iron ore, or other minerals lying near the surface. Operation A shaft is sunk to reach the mineral which is excavated by miners, transported to the surface by a winch, and removed by means of a bucket, much like a well. The bottom of the shaft is enlarged and a sloping roof is created as the desired mineral and surrounding rock is removed – giving its name because the pit in cross section resembles a bell. Typically, no supports were used, and mining continued outwards until the cavity became too dangerous or collapsed at which point another mine was started, often in close proximity. Example and illustrated description This type of mine was in use in prehistoric times, the Middle Ages, and a few continued in use until the early 20th century in the region around Ford, Northumberland. Such pits are common at prehistoric flint working sites such as Grime's Graves in Norfolk and also in the coal mining areas of Yorkshire, the Fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Amber
Blue amber is a rare variety of amber resin that exhibits a blue coloration. Blue amber has been most commonly found in the Dominican Republic—especially in the amber mines around the city of Santiago and, less commonly, in the eastern half of the country. In the modern age, it was discovered at about the same time as Dominican amber. Causes of coloration Vittorio Bellani and Enrico Giulotto at the University of Pavia, Italy, studied several amber specimens by means of optical absorption, fluorescence spectroscopy, and time-resolved fluorescence measurements. The resulting spectral analysis revealed that the emission and excitation spectra were similar in shape to those of diluted solutions of anthracene, perylene, and tetracene, and suggest that the fluorescent hydrocarbon responsible for the blueness is most likely perylene. Fluorescence is the process where molecules absorb high energy light which excites electrons into higher energy molecular orbitals. As these electr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caribbean Journal Of Science
The ''Caribbean Journal of Science'' is a triannual peer-reviewed open-access scientific journal publishing articles, research notes, and book reviews related to science in the Caribbean, with an emphasis on botany, zoology, ecology, conservation biology, geology, archaeology, and paleontology. The journal was established in 1961 with the sponsorship of the College of Arts and Sciences of the University of Puerto Rico at Mayagüez. Abstracting and indexing The journal is abstracted and indexed in Biological Abstracts, BIOSIS Previews, Current Contents/Agriculture, Biology & Environmental Sciences, Science Citation Index Expanded, Scopus, and The Zoological Record. According to the ''Journal Citation Reports'', the journal has a 2016 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcarenite
Calcarenite is a type of limestone that is composed predominantly, more than 50 percent, of detrital (transported) sand-size (0.0625 to 2 mm in diameter), carbonate grains. The grains consist of sand-size grains of either corals, shells, ooids, intraclasts, pellets, fragments of older limestones and dolomites, other carbonate grains, or some combination of these. Calcarenite is the carbonate equivalent of a sandstone. The term calcarenite was originally proposed in 1903 by GrabauGrabau, A.W. (1903) ''Paleozoic coral reefs.'' Geological Society of America Bulletin. vol. 14, pp. 337-352.Grabau, A.W. (1904) ''On the classification of sedimentary rocks.'' American Geologist. vol. 33, pp. 228-247. as a part of his calcilutite, calcarenite and calcirudite carbonate classification system based upon the size of the detrital grains composing a limestone.Flügel, E. (2010) ''Microfacies of Carbonate Rocks'', 2nd ed. Springer-Verlag Berlin, Germany. 976 pp. Neuendorf, K.K.E., J.P. Meh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
