1.
Summit
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A summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. Mathematically, a summit is a maximum in elevation. The topographic terms acme, apex, peak, and zenith are synonymous, the UIAA definition is that a summit is independent if it has a prominence of 30 metres or more, it is a mountain if it has a prominence of at least 300 metres. This can be summarised as follows, A pyramidal peak is an exaggerated form produced by ice erosion of a mountain top, Summit may also refer to the highest point along a line, trail, or route. In many parts of the western United States, the term refers to the highest point along a road, highway. For example, the highest point along Interstate 80 in California is referred to as Donner Summit while the highest point on Interstate 5 is Siskiyou Mountain Summit, geoid Hill List of highest mountains Maxima and minima Nadir Summit accordance Peak finder
2.
Peru
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Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the west by the Pacific Ocean. Peruvian territory was home to ancient cultures spanning from the Norte Chico civilization in Caral, one of the oldest in the world, to the Inca Empire, the largest state in Pre-Columbian America. The Spanish Empire conquered the region in the 16th century and established a Viceroyalty with its capital in Lima, ideas of political autonomy later spread throughout Spanish America and Peru gained its independence, which was formally proclaimed in 1821. After the battle of Ayacucho, three years after proclamation, Peru ensured its independence, subsequently, the country has undergone changes in government from oligarchic to democratic systems. Peru has gone through periods of political unrest and internal conflict as well as periods of stability, Peru is a representative democratic republic divided into 25 regions. It is a country with a high Human Development Index score. Its main economic activities include mining, manufacturing, agriculture and fishing, the Peruvian population, estimated at 31.2 million in 2015, is multiethnic, including Amerindians, Europeans, Africans and Asians. The main spoken language is Spanish, although a significant number of Peruvians speak Quechua or other native languages and this mixture of cultural traditions has resulted in a wide diversity of expressions in fields such as art, cuisine, literature, and music. The name of the country may be derived from Birú, the name of a ruler who lived near the Bay of San Miguel, Panama. When his possessions were visited by Spanish explorers in 1522, they were the southernmost part of the New World yet known to Europeans, thus, when Francisco Pizarro explored the regions farther south, they came to be designated Birú or Perú. An alternative history is provided by the contemporary writer Inca Garcilasco de la Vega, son of an Inca princess, the Spanish Crown gave the name legal status with the 1529 Capitulación de Toledo, which designated the newly encountered Inca Empire as the province of Peru. Under Spanish rule, the country adopted the denomination Viceroyalty of Peru, the earliest evidences of human presence in Peruvian territory have been dated to approximately 9,000 BC. Andean societies were based on agriculture, using such as irrigation and terracing, camelid husbandry. Organization relied on reciprocity and redistribution because these societies had no notion of market or money, the oldest known complex society in Peru, the Norte Chico civilization, flourished along the coast of the Pacific Ocean between 3,000 and 1,800 BC. These early developments were followed by archaeological cultures that developed mostly around the coastal, the Cupisnique culture which flourished from around 1000 to 200 BC along what is now Perus Pacific Coast was an example of early pre-Incan culture. The Chavín culture that developed from 1500 to 300 BC was probably more of a religious than a political phenomenon, on the coast, these included the civilizations of the Paracas, Nazca, Wari, and the more outstanding Chimu and Mochica. Their capital was at Chan Chan outside of modern-day Trujillo, in the 15th century, the Incas emerged as a powerful state which, in the span of a century, formed the largest empire in pre-Columbian America with their capital in Cusco
3.
Headland
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A headland is a coastal landform, a point of land usually high and often with a sheer drop, that extends out into a body of water. It is a type of promontory, a headland of considerable size often is called a cape. Headlands are characterised by high, breaking waves, rocky shores, intense erosion, headlands and bays are often found on the same coastline. A bay is surrounded by land on three sides, whereas a headland is surrounded by water on three sides, headlands and bays form on discordant coastlines, where bands of rock of alternating resistance run perpendicular to the coast. Bays form where weak rocks are eroded, leaving bands of rocks forming a headland. Through the deposition of sediment within the bay and the erosion of the headlands, coastlines eventually straighten out then start the same process all over again
4.
Chorrillos District
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Chorrillos is a district of the Lima Province in Peru and part of the city of Lima. It gets its name from the Spanish word for trickle of water, the current mayor of Chorrilos is Augusto Miyashiro Yamashiro. The district has a land area of 38.94 km². Its administrative center is located 37 meters above sea level, Morro Solar is situated in Chorrillos District.6 persons/km² and 60,353 households. It is famous for its beach resorts at La Herradura, its restaurants, a planetarium is located here, built on the Morro Solar. From Chorrillos, you can enjoy a panoramic view of the bay of Lima and out to La Punta. The area around the Morro Solar was once a town known as Armatambo. Following the Spanish conquest of Peru, however, the settlement was abandoned and forgotten. The resulting town of San Pedro de los Chorrillos was officially established as the District of Chorrillos on January 2,1857, the districts territory was the setting of important episodes in the War of the Pacific against Chile. From republican times, only a group of the large old houses have survived. The Chorrillos Military School was opened here in 1898, famous Peru national football team midfielder Roberto Palacios grew up in Chorrillos, and that is why he is nicknamed El Chorrillano. His community program has gained the attention of Mayor Augusto Miyashiro, the Afro-Peruvian singer Susana Baca is from Chorrillos. The fisherman José Olaya, martyr during the struggle for independence, the former Minister of Education Ramón Miranda Ampuero was born there. June, Saint Peter October, Lord of Miracles Municipalidad de Chorrillos Chorrillos. pe - Information about Chorrillos
5.
Battle of San Juan and Chorrillos
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The Battle of San Juan, also known as the Battle of San Juan and Chorrillos, was the first of two battles in the Lima Campaign during the War of the Pacific, and was fought on January 13,1881. This battle is really a group of smaller, yet fierce confrontations at the defensive strongholds of Villa, Chorrillos, Santiago de Surco, San Juan de Miraflores, Santa Teresa and Morro Solar. The Chilean army led by Gen. Manuel Baquedano inflicted a defeat on the Peruvian army commanded by the Supreme Chief Nicolás de Piérola. The Chilean triumph eliminated the first defensive line guarding Lima, at the end of the battle, the town of Chorrillos was burnt to the ground by the Chilean army trying to eradicate the Peruvian defenders garrisoned there. During the night, civilian abuses were committed by drunk soldiers, despite this result, another battle had to be fought in order that the Chilean army could enter the Peruvian capital city at Miraflores, two days later. After the Chilean victories at the battles of Tacna and Arica, despite this, the public opinion was divided. One side desired to end the war by conquering Lima, the public debate reached the Chilean Congress, were José Miguel Balmaceda declared, The peace is at Lima, and nowhere else. Hence, the talks on the Lackwanna known as the Conference of Arica were futile. Since it became pretty obvious the attack would come from the south, the line of Chorrillos had 15 kilometres long, lying from Marcavilca hill to La Chira, passing through the acclivities of San Juan and Santa Teresa. During the second half of December, the Chilean Navy transported a number of divisions from Pisco, only Patricio Lynchs brigade took a land route. By December 21, the convoy was at Chilca. A detachment of ninety horsemen of the Cazadores a Caballo Cavalry Regiment, led by Lt. Col. Ambrosio Letelier scouted the terrain until they reached Lurin, another 25 Cazadores, joined with Lynch at Bujama. Meanwhile, a massive Chilean disembark at Curayaco took place on December 22, on December 24, a small vanguard force formed by four infantry companies and 200 Cazadores marched to Manchay, from where it goes to Pachacamac, in order to protect the bridge over there. Here, this force engaged Peruvian troops in a fierce skirmish, on the 25, the 1st Brigade of Sotomayors II Division was sent to Pachacamac. With the arrival of Lynchs brigade, the entire Chilean army gathered about 29,935 soldiers, two companies of the Curico Infantry Regiment with 300 artillery men were left here taking care of the wounded generated by the march of part of the Chilean troops. So,23,129 men forwarded to Chorrillos on the afternoon of the 12, hence, it was organized into two Southern Armies at Tacna and Arequipa, one Centre Army and one Northern Army. Pierola ordered the farmers of the Lima Department to form a column and beset the Chilean forces landed in any way they could. When these contingents arrived at Lima, massed up around 18,000 men,10,000 soldiers were sent to the first defensive line set at Chorrillos and the rest were put as a reserve at the second line of Miraflores
6.
Chile
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Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, Chilean territory includes the Pacific islands of Juan Fernández, Salas y Gómez, Desventuradas, and Easter Island in Oceania. Chile also claims about 1,250,000 square kilometres of Antarctica, the arid Atacama Desert in northern Chile contains great mineral wealth, principally copper. Southern Chile is rich in forests and grazing lands, and features a string of volcanoes and lakes, the southern coast is a labyrinth of fjords, inlets, canals, twisting peninsulas, and islands. Spain conquered and colonized Chile in the century, replacing Inca rule in northern and central Chile. After declaring its independence from Spain in 1818, Chile emerged in the 1830s as a relatively stable authoritarian republic, in the 1960s and 1970s the country experienced severe left-right political polarization and turmoil. The regime, headed by Augusto Pinochet, ended in 1990 after it lost a referendum in 1988 and was succeeded by a coalition which ruled through four presidencies until 2010. Chile is today one of South Americas most stable and prosperous nations and it leads Latin American nations in rankings of human development, competitiveness, income per capita, globalization, state of peace, economic freedom, and low perception of corruption. It also ranks high regionally in sustainability of the state, Chile is a founding member of the United Nations, the Union of South American Nations and the Community of Latin American and Caribbean States. There are various theories about the origin of the word Chile, another theory points to the similarity of the valley of the Aconcagua with that of the Casma Valley in Peru, where there was a town and valley named Chili. Another origin attributed to chilli is the onomatopoeic cheele-cheele—the Mapuche imitation of the warble of a locally known as trile. The Spanish conquistadors heard about this name from the Incas, ultimately, Almagro is credited with the universalization of the name Chile, after naming the Mapocho valley as such. The older spelling Chili was in use in English until at least 1900 before switching over to Chile, stone tool evidence indicates humans sporadically frequented the Monte Verde valley area as long as 18,500 years ago. About 10,000 years ago, migrating Native Americans settled in fertile valleys, settlement sites from very early human habitation include Monte Verde, Cueva del Milodon and the Pali Aike Craters lava tube. They fought against the Sapa Inca Tupac Yupanqui and his army, the result of the bloody three-day confrontation known as the Battle of the Maule was that the Inca conquest of the territories of Chile ended at the Maule river. The next Europeans to reach Chile were Diego de Almagro and his band of Spanish conquistadors, the Spanish encountered various cultures that supported themselves principally through slash-and-burn agriculture and hunting. The conquest of Chile began in earnest in 1540 and was carried out by Pedro de Valdivia, one of Francisco Pizarros lieutenants, who founded the city of Santiago on 12 February 1541. Although the Spanish did not find the gold and silver they sought, they recognized the agricultural potential of Chiles central valley
7.
Observatory
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An observatory is a location used for observing terrestrial or celestial events. Astronomy, climatology/meteorology, geology, oceanography and volcanology are examples of disciplines for which observatories have been constructed, historically, observatories were as simple as containing an astronomical sextant or Stonehenge. Astronomical observatories are mainly divided into four categories, space based, airborne, ground based, ground-based observatories, located on the surface of Earth, are used to make observations in the radio and visible light portions of the electromagnetic spectrum. Most optical telescopes are housed within a dome or similar structure, Telescope domes have a slit or other opening in the roof that can be opened during observing, and closed when the telescope is not in use. In most cases, the upper portion of the telescope dome can be rotated to allow the instrument to observe different sections of the night sky. Radio telescopes usually do not have domes, for optical telescopes, most ground-based observatories are located far from major centers of population, to avoid the effects of light pollution. The ideal locations for modern observatories are sites that have dark skies, a percentage of clear nights per year, dry air. At high elevations, the Earths atmosphere is thinner, thereby minimizing the effects of atmospheric turbulence, sites that meet the above criteria for modern observatories include the southwestern United States, Hawaii, Canary Islands, the Andes, and high mountains in Mexico such as Sierra Negra. Major optical observatories include Mauna Kea Observatory and Kitt Peak National Observatory in the USA, Roque de los Muchachos Observatory in Spain, and Paranal Observatory in Chile. Specific research study performed in 2009 shows that the best possible location for ground-based observatory on Earth is Ridge A — a place in the part of Eastern Antarctica. This location provides the least atmospheric disturbances and best visibility, beginning in 1930s, radio telescopes have been built for use in the field of radio astronomy to observe the Universe in the radio portion of the electromagnetic spectrum. Since the mid-20th century, a number of observatories have been constructed at very high altitudes, above 4. The largest and most notable of these is the Mauna Kea Observatory, the Chacaltaya Astrophysical Observatory in Bolivia, at 5,230 m, was the worlds highest permanent astronomical observatory from the time of its construction during the 1940s until 2009. It has now surpassed by the new University of Tokyo Atacama Observatory. As a result, the resolution of space telescopes such as the Hubble Space Telescope is often much smaller than a ground-based telescope with a similar aperture. However, all these advantages do come with a price, Space telescopes are much more expensive to build than ground-based telescopes. Due to their location, space telescopes are also difficult to maintain. The Hubble Space Telescope was serviced by the Space Shuttle while many other space telescopes cannot be serviced at all, Airborne observatories have the advantage of height over ground installations, putting them above most of the Earths atmosphere
8.
Silver
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Silver is a metallic element with symbol Ag and atomic number 47. The symbol Ag stems from Latin argentum, derived from the Greek ὰργὀς, a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earths crust in the pure, free form, as an alloy with gold and other metals. Most silver is produced as a byproduct of copper, gold, lead, Silver is more abundant than gold, but it is much less abundant as a native metal. Its purity is measured on a per mille basis, a 94%-pure alloy is described as 0.940 fine. As one of the seven metals of antiquity, silver has had a role in most human cultures. Silver has long valued as a precious metal. Silver metal is used in many premodern monetary systems in bullion coins, Silver is used in numerous applications other than currency, such as solar panels, water filtration, jewelry, ornaments, high-value tableware and utensils, and as an investment medium. Silver is used industrially in electrical contacts and conductors, in specialized mirrors, window coatings, Silver compounds are used in photographic film and X-rays. Dilute silver nitrate solutions and other compounds are used as disinfectants and microbiocides, added to bandages and wound-dressings, catheters. Silver is similar in its physical and chemical properties to its two neighbours in group 11 of the periodic table, copper and gold. This distinctive electron configuration, with an electron in the highest occupied s subshell over a filled d subshell. Silver is a soft, ductile and malleable transition metal. Silver crystallizes in a cubic lattice with bulk coordination number 12. Unlike metals with incomplete d-shells, metallic bonds in silver are lacking a covalent character and are relatively weak and this observation explains the low hardness and high ductility of single crystals of silver. Silver has a brilliant white metallic luster that can take a polish. Protected silver has greater optical reflectivity than aluminium at all wavelengths longer than ~450 nm, at wavelengths shorter than 450 nm, silvers reflectivity is inferior to that of aluminium and drops to zero near 310 nm. The electrical conductivity of silver is the greatest of all metals, greater even than copper, during World War II in the US,13540 tons of silver were used in electromagnets for enriching uranium, mainly because of the wartime shortage of copper
9.
Callao
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El Callao is the chief seaport of Peru. The city is also called Provincia Constitucional, the province of the Callao Region. The Historic Centre of Callao is located 15 km west of Historic Centre of Lima, the countrys capital, Callao borders Lima Province on the north, east and south, and the Pacific Ocean on the west. El Callao was founded by Spanish colonists in 1537, just two years after Lima and it soon became the main port for Spanish commerce in the Pacific. The origin of its name is unknown, both Indian and Spanish sources are credited, but it is certain that it was known by name since 1550. Other sources point to the similarity with the Portuguese word calhau, on 20 August 1836, during the Peru-Bolivian Confederacy, President Andrés de Santa Cruz mandated the creation of the Callao Littoral Province, which had political autonomy in its internal affairs. During the government of President Ramón Castilla, Callao was given the name of Constitutional Province, on 22 April 1857, before that, all of the other Peruvian provinces had been given their names by law, while Callao was given it by constitutional mandate. Callao was never part of the Lima Department nor of any other departments, the provinces first mayor was Col. Manuel Cipriano Dulanto. By 1949, Callao was known as one of the biggest centers of coca-based products, on 28 October 1746, a tsunami caused by the 1746 Lima–Callao earthquake destroyed the entire port of Callao. On 22 January 22,1826, besieged by nationalist forces backed by Simón Bolívar, on 2 May 1866, during the Battle of Callao, the Spanish fleet tried to reconquer independent Peru. Kon-Tiki left Callao, Peru, on the afternoon of April 28,1947, on 19 June 1986, dozens of Sendero Luminoso terrorists tried to escape but encountered the governments naval forces on El Frontón, resulting in the so-called Peruvian prison massacres. Callao is built on and around a peninsula, the district of La Punta, a historical fortress, the Castillo de Real Felipe, stands on the promontory overlooking the harbor. A large naval base is sited in Callao and its prison holds Abimael Guzmán, the leader of the Shining Path terrorist organization, and Vladimiro Montesinos, the ex-director of internal security during the Fujimori regime. Jorge Chávez International Airport is located in Callao, on a bluff overlooking the harbor sits Colegio Militar Leoncio Prado, the military high school. The city also has a university, the National University of Callao, the main Naval Hospital, Centro Medico Naval is located on Avenida Venezuela in Bellavista. It contains the U. S. Navy command Naval Medical Research Unit Six, residents of Callao are known as chalacos. Callaos professional football teams are Sport Boys and Atlético Chalaco, Callao has several islands, San Lorenzo, El Frontón, the Cavinzas Islands, and the Palomino Islands, where numerous sea lions and sea birds live in a virtually untouched ecosystem. There are proposed plans to build a naval, terrestrial
10.
Cretaceous
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The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period 145 million years ago to the beginning of the Paleogene Period 66 Mya. It is the last period of the Mesozoic Era, the Cretaceous Period is usually abbreviated K, for its German translation Kreide. The Cretaceous was a period with a warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites and rudists, during this time, new groups of mammals and birds, as well as flowering plants, appeared. The Cretaceous ended with a mass extinction, the Cretaceous–Paleogene extinction event, in which many groups, including non-avian dinosaurs, pterosaurs. The end of the Cretaceous is defined by the abrupt Cretaceous–Paleogene boundary, the name Cretaceous was derived from Latin creta, meaning chalk. The Cretaceous is divided into Early and Late Cretaceous epochs, or Lower and Upper Cretaceous series, in older literature the Cretaceous is sometimes divided into three series, Neocomian, Gallic and Senonian. A subdivision in eleven stages, all originating from European stratigraphy, is now used worldwide, in many parts of the world, alternative local subdivisions are still in use. As with other geologic periods, the rock beds of the Cretaceous are well identified. No great extinction or burst of diversity separates the Cretaceous from the Jurassic and this layer has been dated at 66.043 Ma. A140 Ma age for the Jurassic-Cretaceous boundary instead of the usually accepted 145 Ma was proposed in 2014 based on a study of Vaca Muerta Formation in Neuquén Basin. Víctor Ramos, one of the authors of the study proposing the 140 Ma boundary age sees the study as a first step toward formally changing the age in the International Union of Geological Sciences, due to the high sea level there was extensive space for such sedimentation. Because of the young age and great thickness of the system. Chalk is a type characteristic for the Cretaceous. It consists of coccoliths, microscopically small calcite skeletons of coccolithophores, the group is found in England, northern France, the low countries, northern Germany, Denmark and in the subsurface of the southern part of the North Sea. Chalk is not easily consolidated and the Chalk Group still consists of sediments in many places. The group also has other limestones and arenites, among the fossils it contains are sea urchins, belemnites, ammonites and sea reptiles such as Mosasaurus. In southern Europe, the Cretaceous is usually a marine system consisting of competent limestone beds or incompetent marls
11.
Obelisk
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An obelisk is a tall, four-sided, narrow tapering monument which ends in a pyramid-like shape or pyramidion at the top. These were originally called tekhenu by their builders, the Ancient Egyptians, the Greeks who saw them used the Greek obeliskos to describe them, and this word passed into Latin and ultimately English. Ancient obelisks are monolithic, that is, they consist of a single stone, though this technological capacity exists today, most modern obelisks are made of several stones, some, like the Washington Monument, are buildings. The term stele is used for other monumental, upright. Obelisks were prominent in the architecture of the ancient Egyptians, who placed them in pairs at the entrance of temples. The word obelisk as used in English today is of Greek rather than Egyptian origin because Herodotus, a number of ancient Egyptian obelisks are known to have survived, plus the Unfinished Obelisk found partly hewn from its quarry at Aswan. These obelisks are now dispersed around the world, and fewer than half of them remain in Egypt, the earliest temple obelisk still in its original position is the 68-foot 120-metric-ton red granite Obelisk of Senusret I of the XIIth Dynasty at Al-Matariyyah in modern Heliopolis. The obelisk symbolized the sun god Ra, and during the religious reformation of Akhenaten was said to be a petrified ray of the Aten. It was also thought that the god existed within the structure, Benben was the mound that arose from the primordial waters Nu upon which the creator god Atum settled in the creation story of the Heliopolitan creation myth form of Ancient Egyptian religion. The Benben stone is the top stone of the Egyptian pyramid and it is also related to the Obelisk. The pyramid and obelisk might have inspired by previously overlooked astronomical phenomena connected with sunrise and sunset. The Ancient Romans were strongly influenced by the form, to the extent that there are now more than twice as many obelisks standing in Rome as remain in Egypt. All fell after the Roman period except for the Vatican obelisk and were re-erected in different locations. The largest standing and tallest Egyptian obelisk is the Lateran Obelisk in the square at the west side of the Lateran Basilica in Rome at 105.6 feet tall, not all the Egyptian obelisks in the Roman Empire were set up at Rome. Herod the Great imitated his Roman patrons and set up a red granite Egyptian obelisk in the hippodrome of his new city Caesarea in northern Judea and this one is about 40 feet tall and weighs about 100 metric tons. It was discovered by archaeologists and has been re-erected at its former site and this one stood 95 feet tall and weighing 380 metric tons. Its lower half reputedly also once stood in Istanbul but is now lost, the Istanbul obelisk is 65 feet tall. Rome is the capital of the world
12.
Bronze
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These additions produce a range of alloys that may be harder than copper alone, or have other useful properties, such as stiffness, ductility, or machinability. The archeological period where bronze was the hardest metal in use is known as the Bronze Age. In the ancient Near East this began with the rise of Sumer in the 4th millennium BC, with India and China starting to use bronze around the same time, everywhere it gradually spread across regions. The Bronze Age was followed by the Iron Age starting from about 1300 BC and reaching most of Eurasia by about 500 BC, the discovery of bronze enabled people to create metal objects which were harder and more durable than previously possible. Bronze tools, weapons, armor, and building such as decorative tiles were harder and more durable than their stone. It was only later that tin was used, becoming the major ingredient of bronze in the late 3rd millennium BC. Tin bronze was superior to arsenic bronze in that the process could be more easily controlled. Also, unlike arsenic, metallic tin and fumes from tin refining are not toxic, the earliest tin-alloy bronze dates to 4500 BCE in a Vinča culture site in Pločnik. Other early examples date to the late 4th millennium BC in Africa, Susa and some ancient sites in China, Luristan, ores of copper and the far rarer tin are not often found together, so serious bronze work has always involved trade. Tin sources and trade in ancient times had a influence on the development of cultures. In Europe, a source of tin was the British deposits of ore in Cornwall. In many parts of the world, large hoards of bronze artefacts are found, suggesting that bronze also represented a store of value, in Europe, large hoards of bronze tools, typically socketed axes, are found, which mostly show no signs of wear. With Chinese ritual bronzes, which are documented in the inscriptions they carry and from other sources and these were made in enormous quantities for elite burials, and also used by the living for ritual offerings. Pure iron is soft, and the process of beating and folding sponge iron to wrought iron removes from the metal carbon. Careful control of the alloying and tempering eventually allowed for wrought iron with properties comparable to modern steel, Bronze was still used during the Iron Age, and has continued in use for many purposes to the modern day. Among other advantages, it does not rust, the weaker wrought iron was found to be sufficiently strong for many uses. Archaeologists suspect that a disruption of the tin trade precipitated the transition. The population migrations around 1200–1100 BC reduced the shipping of tin around the Mediterranean, limiting supplies, there are many different bronze alloys, but typically modern bronze is 88% copper and 12% tin
