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Cabezo Juré
Cabezo Juré is an archaeological site located in Alosno, Andalusia from the 3rd millennium BC. The archaeological excavations have recently revealed the vestiges of an ancient community of workers specialized in the metallurgy of copper. Evidence of their metallurgical activity has been found in remains of various furnaces obtained at temperatures close to 2,200 °F as well as large quantities of slag by SiO2 saturate silicates and copper products. Calibrated In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. Such a standard could be another measurement device of known ... radiocarbon age revealed it was active between 2873 and 2274 BC. References {{coord missing, Spain Chalcolithic sites of Europe Ruins in Spain Industrial archaeological sites Megalithic monuments in Spain Archaeological sites in Andalusia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alosno
Alosno is a town and municipality located in the province of Huelva (province), Huelva, Spain. According to the 2013 census, the village has a population of 1,840 inhabitants. The Filon Sur Mine, in Alosno municipality, is a notable source of fine specimens of the mineral goethite. Nearby is a 4500+ year old copper smelting archeological site named Cabezo Juré. The region is notable for production of fine ham, Jamon Serrano, through a system of pasturing and finishing on Holm oak's sweet acorns ( Bellotas ). The chorizo and local Manchego sheep cheeses are also outstanding. Much of the best land is also planted with green olives, for oil or for storage whole in brine. The town's style is very mediterranean with whitewashed walls and cobbles or concrete walks. Approximately 15 Bar/Grills and a number of more formal dinner restaurants line the main street in/out of town, with a main market and outdoor market also selling produce from stalls. Very low humidity makes up for the heat, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallurgical Furnace
A metallurgical furnace, often simply referred to as a furnace when the context is known, is an industrial furnace used to heat, melt, or otherwise process metals. Furnaces have been a central piece of equipment throughout the history of metallurgy; processing metals with heat is even its own engineering specialty known as pyrometallurgy. One important furnace application, especially in iron and steel production, is smelting, where metal ores are Redox, reduced under high heat to separate the metal content from mineral gangue. The heat energy to fuel a furnace may be supplied directly by fuel combustion or by electricity. Different processes and the unique properties of specific metals and ores have led to many different furnace types. Air blast furnaces Many furnace designs for smelting combine ore, fuel, and other reagents like flux in a single chamber. Mechanisms, such as bellows or motorized fans, then drive pressurized blasts of air into the chamber. These blasts make the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Industrial Archaeological Sites
Industrial may refer to: Industry * Industrial archaeology, the study of the history of the industry * Industrial engineering, engineering dealing with the optimization of complex industrial processes or systems * Industrial city, a city dominated by one or more industries * Industrial loan company, a financial institution in the United States that lends money, and may be owned by non-financial institutions * Industrial organization, a field that builds on the theory of the firm by examining the structure and boundaries between firms and markets * Industrial Revolution, the development of industry in the 18th and 19th centuries **Second Industrial Revolution * Industrial society, a society that has undergone industrialization * Industrial technology, a broad field that includes designing, building, optimizing, managing and operating industrial equipment, and predesignated as acceptable for industrial uses, like factories * Industrial video, a video that targets “industry” as it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruins In Spain
Ruins () are the remains of a civilization's architecture. The term refers to formerly intact structures that have fallen into a state of partial or total disrepair over time due to a variety of factors, such as lack of maintenance, deliberate destruction by humans, or uncontrollable destruction by natural phenomena. The most common root causes that yield ruins in their wake are natural disasters, armed conflict, and population decline, with many structures becoming progressively derelict over time due to long-term weathering and scavenging. There are famous ruins all over the world, with notable sites originating from ancient China, the Indus Valley, ancient Iran, ancient Israel and Judea, ancient Iraq, ancient Greece, ancient Egypt, ancient Yemen, Roman, ancient India sites throughout the Mediterranean Basin, and Incan and Mayan sites in the Americas. Ruins are of great importance to historians, archaeologists and anthropologists, whether they were once individual fortifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalcolithic Sites Of Europe
The Chalcolithic ( ) (also called the Copper Age and Eneolithic) was an archaeological period characterized by the increasing use of smelted copper. It followed the Neolithic and preceded the Bronze Age. It occurred at different periods in different areas, but was absent in some parts of the world, such as Russia, where there was no well-defined Copper Age between the Stone and Bronze Ages. Stone tools were still predominantly used during this period. The Chalcolithic covers both the early cold working (hammering) of near pure copper ores, as exhibited by the likes of North American Great Lakes Old Copper complex, from around 6,500 BC, through the later copper smelting cultures. The archaeological site of Belovode, on Rudnik mountain in Serbia, has the world's oldest securely dated evidence of copper smelting at high temperature, from . The transition from Copper Age to Bronze Age in Europe occurred between the late 5th and the late In the Ancient Near East the Copper Age cov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiocarbon Age
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was developed in the late 1940s at the University of Chicago by Willard Libby. It is based on the fact that radiocarbon () is constantly being created in the Earth's atmosphere by the interaction of cosmic rays with atmospheric nitrogen. The resulting combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire by eating the plants. When the animal or plant dies, it stops exchanging carbon with its environment, and thereafter the amount of it contains begins to decrease as the undergoes radioactive decay. Measuring the amount of in a sample from a dead plant or animal, such as a piece of wood or a fragment of bone, provides information that can be used to calc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calibration Of Radiocarbon Dates
Radiocarbon dating measurements produce ages in "radiocarbon years", which must be converted to calendar ages by a process called calibration. Calibration is needed because the atmospheric / ratio, which is a key element in calculating radiocarbon ages, has not been constant historically.Taylor (1987), p. 133. Willard Libby, the inventor of radiocarbon dating, pointed out as early as 1955 the possibility that the ratio might have varied over time. Discrepancies began to be noted between measured ages and known historical dates for artefacts, and it became clear that a correction would need to be applied to radiocarbon ages to obtain calendar dates. Uncalibrated dates may be stated as "radiocarbon years ago", abbreviated "ya". The term Before Present (BP) is established for reporting dates derived from radiocarbon analysis, where "present" is 1950. Uncalibrated dates are stated as "uncal BP", and ''calibrated'' (corrected) dates as "cal BP". Used alone, the term BP is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SiO2
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , commonly found in nature as quartz. In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and abundant families of materials, existing as a compound of several minerals and as a synthetic product. Examples include fused quartz, fumed silica, opal, and aerogels. It is used in structural materials, microelectronics, and as components in the food and pharmaceutical industries. All forms are white or colorless, although impure samples can be colored. Silicon dioxide is a common fundamental constituent of glass. Structure In the majority of silicon dioxides, the silicon atom shows Tetrahedral molecular geometry, tetrahedral coordination, with four oxygen atoms surrounding a central Si atomsee 3-D Unit Cell. Thus, SiO2 forms 3-dimensional network solids in which each silicon atom is covalently bonded in a tetrahedral manner to 4 oxygen atoms. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slag
The general term slag may be a by-product or co-product of smelting (pyrometallurgical) ores and recycled metals depending on the type of material being produced. Slag is mainly a mixture of metal oxides and silicon dioxide. Broadly, it can be classified as ferrous (co-products of processing iron and steel), ferroalloy (a by-product of ferroalloy production) or non-ferrous/ base metals (by-products of recovering non-ferrous materials like copper, nickel, zinc and phosphorus). Within these general categories, slags can be further categorized by their precursor and processing conditions (e.g., blast furnace slags, air-cooled blast furnace slag, granulated blast furnace slag, basic oxygen furnace slag, and electric arc furnace slag). Slag generated from the EAF process can contain toxic metals, which can be hazardous to human and environmental health. Due to the large demand for ferrous, ferralloy, and non-ferrous materials, slag production has increased throughout the years des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andalusia
Andalusia ( , ; , ) is the southernmost autonomous communities of Spain, autonomous community in Peninsular Spain, located in the south of the Iberian Peninsula, in southwestern Europe. It is the most populous and the second-largest autonomous community in the country. It is officially recognized as a nationalities and regions of Spain, historical nationality and a national reality. The territory is divided into eight provinces of Spain, provinces: Province of Almería, Almería, Province of Cádiz, Cádiz, Province of Córdoba (Spain), Córdoba, Province of Granada, Granada, Province of Huelva, Huelva, Province of Jaén (Spain), Jaén, Province of Málaga, Málaga, and Province of Seville, Seville. Its capital city is Seville, while the seat of High Court of Justice of Andalusia, its High Court of Justice is the city of Granada. Andalusia is immediately south of the autonomous communities of Extremadura and Castilla-La Mancha; west of the autonomous community of Region of Mur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El País
(; ) is a Spanish-language daily newspaper in Spain. is based in the capital city of Madrid and it is owned by the Spanish media conglomerate PRISA. It is the second-most circulated daily newspaper in Spain . is the most read newspaper in Spanish online and one of the Madrid dailies considered to be a national newspaper of record for Spain (along with '' El Mundo'' and '' ABC)''. In 2018, its number of daily sales were 138,000. Its headquarters and central editorial staff are located in Madrid, although there are regional offices in the principal Spanish cities (Barcelona, Seville, Valencia, Bilbao, and Santiago de Compostela) where regional editions were produced until 2015. also produces a world edition in Madrid that is available online in English and in Spanish (Latin America). History was founded in May 1976 by a team at PRISA which included Jesus de Polanco, José Ortega Spottorno and Carlos Mendo. The paper was designed by Reinhard Gade and Julio Alonso. It wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
