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Ochre
Ochre ( ; , ), or ocher in American English, is a natural clay earth pigment, a mixture of ferric oxide and varying amounts of clay and sand. It ranges in colour from yellow to deep orange or brown. It is also the name of the colours produced by this pigment, especially a light brownish-yellow. A variant of ochre containing a large amount of hematite, or dehydrated iron oxide, has a reddish tint known as "red ochre" (or, in some dialects, ruddle). The word ochre also describes clays coloured with iron oxide derived during the extraction of tin and copper. Earth pigments Ochre is a family of earth pigments, which includes yellow ochre, red ochre, purple ochre, sienna, and umber. The major ingredient of all the ochres is iron(III) oxide-hydroxide, known as limonite, which gives them a yellow colour. * Yellow ochre, , is a hydrated iron hydroxide (limonite) also called gold ochre. * Red ochre, , takes its reddish colour from the mineral hematite, which is an anhydrous i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roussillon, Vaucluse
Roussillon (; oc, Rossilhon) is a commune in the Vaucluse department of the Provence-Alpes-Côte d'Azur region in Southeastern France. In 2016 it had a population of 1,317. Roussillon lies within the borders of the Natural Regional Park of Luberon. In the French natural regional parks system, new economic activities may be developed only if they are sustainable. It is noted for its large ochre deposits found in the clay surrounding the village. Ochres are pigments ranging from yellow and orange to red. One of the former ochre quarries can be visited via the "Sentier des Ocres" (Ochre Path), a walk of either 30 or 60 minutes through the old workings. Geography The village stands on an ochre ridge, situated in a broad valley with the "Monts du Vaucluse" to the north and the "Petit" Luberon to the south. The nearest railway station is in Cavaillon; the nearest TGV station is in Avignon. The river Calavon forms part of the commune's southern border. Geology Roussillon is famous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hematite
Hematite (), also spelled as haematite, is a common iron oxide compound with the formula, Fe2O3 and is widely found in rocks and soils. Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of . It has the same crystal structure as corundum () and ilmenite (). With this it forms a complete solid solution at temperatures above . Hematite naturally occurs in black to steel or silver-gray, brown to reddish-brown, or red colors. It is mined as an important ore mineral of iron. It is electrically conductive. Hematite varieties include ''kidney ore'', ''martite'' (pseudomorphs after magnetite), ''iron rose'' and ''specularite'' ( specular hematite). While these forms vary, they all have a rust-red streak. Hematite is not only harder than pure iron, but also much more brittle. Maghemite is a polymorph of hematite (γ-) with the same chemical formula, but with a spinel structure like magnetite. Large deposits of hematite are fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay Earth Pigment
Earth pigments are naturally occurring minerals containing metal oxides, principally iron oxides and manganese oxides, that have been used since prehistoric times as pigments. The primary types are ochre, sienna and umber. Earth pigments are known for their fast drying time in oil painting, relative inexpensiveness, and lightfastness. Cave paintings done in sienna still survive today. Production After mining, the mineral used for making a pigment is ground to a very fine powder (if not already in the form of clay), washed to remove water-soluble components, dried, and ground again to powder. For some pigments, notably sienna and umber, the color can be deepened by heating (calcination) in a process known as "burning", although it does not involve oxidation but instead dehydration In physiology, dehydration is a lack of total body water, with an accompanying disruption of metabolic processes. It occurs when free water loss exceeds free water intake, usually due to exercise, d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goethite
Goethite (, ) is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the "α" polymorph. It is found in soil and other low-temperature environments such as sediment. Goethite has been well known since ancient times for its use as a pigment (brown ochre). Evidence has been found of its use in paint pigment samples taken from the caves of Lascaux in France. It was first described in 1806 based on samples found in the Hollertszug Mine in Herdorf, Germany. The mineral was named after the German polymath and poet Johann Wolfgang von Goethe (1749–1832). Composition Goethite is an iron oxyhydroxide containing ferric iron. It is the main component of rust and bog iron ore. Goethite's hardness ranges from 5.0 to 5.5 on the Mohs Scale, and its specific gravity varies from 3.3 to 4.3. The mineral forms prismatic needle-like crystals ("needle ironstone") but is more typically massive. Feroxyhyte and lepidocrocite are both polymorphs of the iron oxy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limonite
Limonite () is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition. The generic formula is frequently written as FeO(OH)·H2O, although this is not entirely accurate as the ratio of oxide to hydroxide can vary quite widely. Limonite is one of the three principal iron ores, the others being hematite and magnetite, and has been mined for the production of iron since at least 2500 BP. Names Limonite is named for the Greek word λειμών (/leː.mɔ̌ːn/), meaning "wet meadow", or λίμνη (/lím.nɛː/), meaning “marshy lake” as an allusion to its occurrence as '' bog iron ore'' in meadows and marshes. In its brown form it is sometimes called brown hematite or brown iron ore. Characteristics Limonite is relatively dense with a specific gravity varying from 2.7 to 4.3.Northrop, Stuart A. (1959) "Limonite" ''Minerals of New Mexico'' (revised edition) University of New Mexico Press, Albuquerque, New Mexico, pp. 329–333 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aurignacian
The Aurignacian () is an archaeological industry of the Upper Paleolithic associated with European early modern humans (EEMH) lasting from 43,000 to 26,000 years ago. The Upper Paleolithic developed in Europe some time after the Levant, where the Emiran period and the Ahmarian period form the first periods of the Upper Paleolithic, corresponding to the first stages of the expansion of ''Homo sapiens'' out of Africa. They then migrated to Europe and created the first European culture of modern humans, the Aurignacian. An Early Aurignacian or Proto-Aurignacian stage is dated between about 43,000 and 37,000 years ago. The Aurignacian proper lasts from about 37,000 to 33,000 years ago. A Late Aurignacian phase transitional with the Gravettian dates to about 33,000 to 26,000 years ago. The type site is the Cave of Aurignac, Haute-Garonne, south-west France. The main preceding period is the Mousterian of the ''Neanderthals''. One of the oldest examples of figurative art, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Goddess Hypothesis
The Great Goddess hypothesis theorizes that, in Palaeolithic, Mesolithic and/or Neolithic Europe and Western Asia and North Africa, a singular, monotheistic female deity was worshipped. Development of the theory The theory had been first proposed by the German Classicist Eduard Gerhard in 1849, when he speculated that the various goddesses found in ancient Greek paganism had been representations of a singular goddess who had been worshipped far further back into prehistory. He associated this deity with the concept of Mother Earth, which itself had only been developed in the 18th century by members of the Romanticist Movement. Soon after, this theory began to be adopted by other classicists in France and Germany, such as Ernst Kroker, Fr. Lenormant and M.J. Menant, who further brought in the idea that the ancient peoples of Anatolia and Mesopotamia had influenced the Greek religion, and that therefore they also had once venerated a great goddess.Hutton, Ronald (1999). ''The Triu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lascaux
Lascaux ( , ; french: Grotte de Lascaux , "Lascaux Cave") is a network of caves near the village of Montignac, in the department of Dordogne in southwestern France. Over 600 parietal wall paintings cover the interior walls and ceilings of the cave. The paintings represent primarily large animals, typical local contemporary fauna that correspond with the fossil record of the Upper Paleolithic in the area. They are the combined effort of many generations and, with continued debate, the age of the paintings is now usually estimated at around 17,000 years (early Magdalenian). Because of the outstanding prehistoric art in the cave, Lascaux was inducted into the UNESCO World Heritage List in 1979, as an element of the '' Prehistoric Sites and Decorated Caves of the Vézère Valley''. The original caves have been closed to the public since 1963, as their condition was deteriorating, but there are now a number of replicas. History since rediscovery On 12 September 1940, the entr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineraloid
A mineraloid is a naturally occurring mineral-like substance that does not demonstrate crystallinity. Mineraloids possess chemical compositions that vary beyond the generally accepted ranges for specific minerals. For example, obsidian is an amorphous glass and not a crystal. Jet is derived from decaying wood under extreme pressure. Opal is another mineraloid because of its non-crystalline nature. Pearl is considered a mineraloid because the included calcite and/or aragonite crystals are bonded by an organic material, and there is no definite proportion of the components. Examples * Allophane, solid (IMA/CNMNC valid mineral name) * Amber, non-crystalline structure, organic * Anthracite or hard coal * Bituminous coal * Chlorophaeite * Chrysocolla, solid (IMA/CNMNC valid mineral name) * Deweylite, a mixture of serpentine and talc or stevensite * Diatomite * Ebonite, vulcanized natural or synthetic rubber (organic); lacks a crystalline structure * Fulgurite, a varie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave Of Altamira
The Cave of Altamira (; es, Cueva de Altamira ) is a cave complex, located near the historic town of Santillana del Mar in Cantabria, Spain. It is renowned for prehistoric cave art featuring charcoal drawings and polychrome paintings of contemporary local fauna and human hands. The earliest paintings were applied during the Upper Paleolithic, around 36,000 years ago. The site was discovered in 1868 by Modesto Cubillas and subsequently studied by Marcelino Sanz de Sautuola. Aside from the striking quality of its polychromatic art, Altamira's fame stems from the fact that its paintings were the first European cave paintings for which a prehistoric origin was suggested and promoted. Sautuola published his research with the support of Juan de Vilanova y Piera in 1880, to initial public acclaim. However, the publication of Sanz de Sautuola's research quickly led to a bitter public controversy among experts, some of whom rejected the prehistoric origin of the paintings on the groun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pech Merle
Pech Merle is a cave which opens onto a hillside at Cabrerets in the Lot département of the Occitania region in France, about 32 km by road east of Cahors. It is one of the few prehistoric cave painting sites in France that remain open to the general public. Extending over 2 kilometres over two levels, of which only are open to the public, are caverns, wells and sloping tunnels, the walls of which are painted with dramatic murals dating from the Gravettian culture (some 25,000 years BC). Some of the paintings and engravings, however, may date from the later Magdalenian era (16,000 years BC). This cave was created over 2 million years ago by an underground river, cutting channels which were later used by humans for shelter and eventually for mural painting. The galleries are mostly dry, 10 meters wide on average. The height under the vault is between 5 and 10 meters high. The cave art located in the deeper areas of the cave was discovered in 1922 by Marthe David, age 13; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Lady Of Paviland
The Red Lady of Paviland is an Upper Paleolithic partial skeleton of a male dyed in red ochre and buried in Wales 33,000 BP. The bones were discovered in 1823 by William Buckland in an archaeological dig at Goat's Hole Cave (Paviland cave) – one of the limestone caves between Port Eynon and Rhossili on the Gower Peninsula, Swansea, south Wales. The remains were at first thought to be a Roman-era female, but more recent analysis indicates the bones are of a young male. Goat's Hole was occupied throughout prehistory. Artefacts are predominantly Aurignacian, but also include examples from the earlier Mousterian, and later Gravettian and Creswellian periods. The site is the oldest known ceremonial burial in Western Europe. Discovery In 1822 Daniel Davies and the Rev John Davies found animal bones, including the tusk of a mammoth. The Talbot family of Penrice Castle was informed and found "bones of elephants" on 27 December 1822. William Buckland, Professor of Geology at Oxford ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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