78-504: Dale Head is a fell in the north-western sector of the Lake District , in northern England. It is 753 metres (2,470 feet) above sea level and stands immediately north of Honister Pass , the road between Borrowdale and Buttermere . The North-Western Fells occupy the area between the rivers Derwent and Cocker , a broadly oval swathe of hilly country, elongated on a north-south axis. Two roads cross from east to west, dividing
156-579: A Gilman reagent . These can undergo substitution with alkyl halides to form coupling products ; as such, they are important in the field of organic synthesis . Copper(I) acetylide is highly shock-sensitive but is an intermediate in reactions such as the Cadiot–Chodkiewicz coupling and the Sonogashira coupling . Conjugate addition to enones and carbocupration of alkynes can also be achieved with organocopper compounds. Copper(I) forms
234-485: A building material , and as a constituent of various metal alloys , such as sterling silver used in jewelry , cupronickel used to make marine hardware and coins , and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals ). This led to very early human use in several regions, from c. 8000 BC . Thousands of years later, it
312-696: A covalent character and are relatively weak. This observation explains the low hardness and high ductility of single crystals of copper. At the macroscopic scale, introduction of extended defects to the crystal lattice , such as grain boundaries, hinders flow of the material under applied stress, thereby increasing its hardness. For this reason, copper is usually supplied in a fine-grained polycrystalline form, which has greater strength than monocrystalline forms. The softness of copper partly explains its high electrical conductivity ( 59.6 × 10 S /m ) and high thermal conductivity, second highest (second only to silver) among pure metals at room temperature. This
390-643: A nickel ) consists of 75% copper and 25% nickel in homogeneous composition. Prior to the introduction of cupronickel, which was widely adopted by countries in the latter half of the 20th century, alloys of copper and silver were also used, with the United States using an alloy of 90% silver and 10% copper until 1965, when circulating silver was removed from all coins with the exception of the half dollar—these were debased to an alloy of 40% silver and 60% copper between 1965 and 1970. The alloy of 90% copper and 10% nickel, remarkable for its resistance to corrosion,
468-425: A spin of 3 ⁄ 2 . The other isotopes are radioactive , with the most stable being Cu with a half-life of 61.83 hours. Seven metastable isomers have been characterized; Cu is the longest-lived with a half-life of 3.8 minutes. Isotopes with a mass number above 64 decay by β , whereas those with a mass number below 64 decay by β . Cu , which has
546-581: A youth hostel . The route ascends directly alongside a fence for approximately 2 kilometres ( 1 + 1 ⁄ 4 miles) and would take the average walker some 45 or 50 minutes. Longer routes begin at Little Town in the Newlands Valley, climbing either via Dalehead Tarn or the old access track to Dale Head Mine. From Borrowdale a start can be made at either Seatoller or Longthwaite, ascending first to Launchy Tarn and High Scawdel. Fell A fell (from Old Norse fell , fjall , "mountain" )
624-399: A blast furnace. A potential source of copper is polymetallic nodules, which have an estimated concentration 1.3%. Like aluminium , copper is recyclable without any loss of quality, both from raw state and from manufactured products. In volume, copper is the third most recycled metal after iron and aluminium. An estimated 80% of all copper ever mined is still in use today. According to
702-464: A blue crystalline penta hydrate , the most familiar copper compound in the laboratory. It is used in a fungicide called the Bordeaux mixture . Polyols , compounds containing more than one alcohol functional group , generally interact with cupric salts. For example, copper salts are used to test for reducing sugars . Specifically, using Benedict's reagent and Fehling's solution the presence of
780-637: A collective rather than a specific location or specific summit (the "s" in til fjells is an old genitive form remaining only in fixed expressions). According to Ivar Aasen, berg refers to cliffs, bedrock and notable elevations of the surface underpinned by bedrock; berg also refers to the substance of bedrock. For all practical purposes, fjell can be translated as "mountain" and the Norwegian language has no other commonly used word for mountain. In Sweden, fjäll generally refers to any mountain or upland high enough that forest will not naturally survive at
858-588: A community; thus the township of Cartmel Fell . In northern England, there is a Lord of the Fells – this ancient aristocratic title being associated with the Lords of Bowland . Groups of cairns are a common feature on many fells, often marking the summit – there are fine examples on Wild Boar Fell in Mallerstang Dale, Cumbria , and on Nine Standards Rigg just outside Kirkby Stephen , Cumbria. As
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#1732775523981936-457: A green patina of compounds called verdigris . Copper is sometimes used in decorative art , both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents , fungicides , and wood preservatives . Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase . In molluscs and crustaceans , copper
1014-505: A half-life of 12.7 hours, decays both ways. Cu and Cu have significant applications. Cu is used in Cu Cu-PTSM as a radioactive tracer for positron emission tomography . Copper is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million (ppm). In nature, copper occurs in
1092-687: A layer of brown-black copper oxide which, unlike the rust that forms on iron in moist air, protects the underlying metal from further corrosion ( passivation ). A green layer of verdigris (copper carbonate) can often be seen on old copper structures, such as the roofing of many older buildings and the Statue of Liberty . Copper tarnishes when exposed to some sulfur compounds, with which it reacts to form various copper sulfides . There are 29 isotopes of copper. Cu and Cu are stable, with Cu comprising approximately 69% of naturally occurring copper; both have
1170-532: A natural color other than gray or silver. Pure copper is orange-red and acquires a reddish tarnish when exposed to air. This is due to the low plasma frequency of the metal, which lies in the red part of the visible spectrum, causing it to absorb the higher-frequency green and blue colors. As with other metals, if copper is put in contact with another metal in the presence of an electrolyte , galvanic corrosion will occur. Copper does not react with water, but it does slowly react with atmospheric oxygen to form
1248-407: A red-brown precipitate with copper(II) salts. Compounds that contain a carbon-copper bond are known as organocopper compounds. They are very reactive towards oxygen to form copper(I) oxide and have many uses in chemistry . They are synthesized by treating copper(I) compounds with Grignard reagents , terminal alkynes or organolithium reagents ; in particular, the last reaction described produces
1326-451: A rich variety of compounds, usually with oxidation states +1 and +2, which are often called cuprous and cupric , respectively. Copper compounds promote or catalyse numerous chemical and biological processes. As with other elements, the simplest compounds of copper are binary compounds, i.e. those containing only two elements, the principal examples being oxides, sulfides, and halides . Both cuprous and cupric oxides are known. Among
1404-424: A variety of minerals, including native copper , copper sulfides such as chalcopyrite , bornite , digenite , covellite , and chalcocite , copper sulfosalts such as tetrahedite-tennantite , and enargite , copper carbonates such as azurite and malachite , and as copper(I) or copper(II) oxides such as cuprite and tenorite , respectively. The largest mass of elemental copper discovered weighed 420 tonnes and
1482-436: A variety of weak complexes with alkenes and carbon monoxide , especially in the presence of amine ligands. Copper(III) is most often found in oxides. A simple example is potassium cuprate , KCuO 2 , a blue-black solid. The most extensively studied copper(III) compounds are the cuprate superconductors . Yttrium barium copper oxide (YBa 2 Cu 3 O 7 ) consists of both Cu(II) and Cu(III) centres. Like oxide, fluoride
1560-403: A whole, strictly speaking refers to the summit; the slopes have names such as Tilberthwaite High Fell, Low Fell and Above Beck Fells. The word "fell" is also used in the names of various breeds of livestock , bred for life on the uplands, such as Rough Fell sheep, Fell terriers and Fell ponies . It is also found in many place names across the north of England, often attached to the name of
1638-472: A word limited to far-Northern dialects of Finnish and Karelian, is a loan from Sami , compare Proto-Sami *tuontër , South Sami doedtere , Northern Sami duottar , Inari Sami tuodâr "uplands, mountains, tundra", Kildin Sami tūndâr , which means "uplands, treeless mountain tract" and is cognate with Finnish tanner "hard ground". From this Sami word, the word " tundra " is borrowed, as well, through
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#17327755239811716-583: Is a constituent of the blood pigment hemocyanin , replaced by the iron-complexed hemoglobin in fish and other vertebrates . In humans, copper is found mainly in the liver, muscle, and bone. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. In the Roman era , copper was mined principally on Cyprus , the origin of the name of the metal, from aes cyprium (metal of Cyprus), later corrupted to cuprum (Latin). Coper ( Old English ) and copper were derived from this,
1794-675: Is a high and barren landscape feature, such as a mountain or moor -covered hill. The term is most often employed in Fennoscandia , Iceland , the Isle of Man , parts of northern England , and Scotland . The English word "fell" comes from Old Norse fell and fjall (both forms existed). It is cognate with Danish fjeld , Faroese fjall and fjøll , Icelandic fjall and fell , Norwegian fjell with dialects fjøll , fjødd , fjedd , fjedl , fjill , fil(l) , and fel , and Swedish fjäll , all referring to mountains rising above
1872-405: Is a highly basic anion and is known to stabilize metal ions in high oxidation states. Both copper(III) and even copper(IV) fluorides are known, K 3 CuF 6 and Cs 2 CuF 6 , respectively. Some copper proteins form oxo complexes , which, in extensively studied synthetic analog systems, feature copper(III). With tetrapeptides , purple-colored copper(III) complexes are stabilized by
1950-401: Is because the resistivity to electron transport in metals at room temperature originates primarily from scattering of electrons on thermal vibrations of the lattice, which are relatively weak in a soft metal. The maximum possible current density of copper in open air is approximately 3.1 × 10 A/m , above which it begins to heat excessively. Copper is one of a few metallic elements with
2028-524: Is marked by a cairn standing on the brink of the northern face. There is a fine end-on view of the Newlands Valley to the north, backed by Skiddaw. All around are rank upon rank of fells, of the major Lakeland ranges only the High Street group not being fully visible. One of the most popular ascent routes of Dale Head begins from the summit of Honister Pass , where there is a car park and
2106-533: Is melted in a furnace and then reduced and cast into billets and ingots ; lower-purity scrap is refined by electroplating in a bath of sulfuric acid . The environmental cost of copper mining was estimated at 3.7 kg CO2eq per kg of copper in 2019. Codelco, a major producer in Chile, reported that in 2020 the company emitted 2.8t CO2eq per ton (2.8 kg CO2eq per kg) of fine copper. Greenhouse gas emissions primarily arise from electricity consumed by
2184-444: Is one of the most important constituents of silver and karat gold solders used in the jewelry industry, modifying the color, hardness and melting point of the resulting alloys. Some lead-free solders consist of tin alloyed with a small proportion of copper and other metals. The alloy of copper and nickel , called cupronickel , is used in low-denomination coins, often for the outer cladding. The US five-cent coin (currently called
2262-437: Is recovered from mine tailings and heaps. A variety of methods are used including leaching with sulfuric acid, ammonia, ferric chloride. Biological methods are also used. A significant source of copper is from recycling. Recycling is facilitated because copper is usually deployed in its metallic state. In 2001, a typical automobile contained 20–30 kg of copper. Recycling usually begins with some melting process using
2340-529: Is the case with Seathwaite Fell , for example, which would be the common grazing land used by the farmers of Seathwaite . The fellgate marks the road from a settlement onto the fell (see photograph for example), as is the case with the Seathwaite Fell. In other cases the reverse is true; for instance, the name of Wetherlam , in the Coniston Fells , though understood to refer to the mountain as
2418-411: Is used for various objects exposed to seawater, though it is vulnerable to the sulfides sometimes found in polluted harbors and estuaries. Alloys of copper with aluminium (about 7%) have a golden color and are used in decorations. Shakudō is a Japanese decorative alloy of copper containing a low percentage of gold, typically 4–10%, that can be patinated to a dark blue or black color. Copper forms
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2496-686: The British Geological Survey , in 2005, Chile was the top producer of copper with at least one-third of the world share followed by the United States, Indonesia and Peru. Copper can also be recovered through the in-situ leach process. Several sites in the state of Arizona are considered prime candidates for this method. The amount of copper in use is increasing and the quantity available is barely sufficient to allow all countries to reach developed world levels of usage. An alternative source of copper for collection currently being researched are polymetallic nodules , which are located at
2574-607: The Great Lakes may have also been mining copper during this time, making it one of the oldest known examples of copper extraction in the world. There is evidence from prehistoric lead pollution from lakes in Michigan that people in the region began mining copper c. 6000 BC . Evidence suggests that utilitarian copper objects fell increasingly out of use in the Old Copper Complex of North America during
2652-553: The International Resource Panel 's Metal Stocks in Society report , the global per capita stock of copper in use in society is 35–55 kg. Much of this is in more-developed countries (140–300 kg per capita) rather than less-developed countries (30–40 kg per capita). The process of recycling copper is roughly the same as is used to extract copper but requires fewer steps. High-purity scrap copper
2730-726: The Neolithic period and the Bronze Age was formerly termed the Chalcolithic period (copper-stone), when copper tools were used with stone tools. The term has gradually fallen out of favor because in some parts of the world, the Chalcolithic and Neolithic are coterminous at both ends. Brass, an alloy of copper and zinc, is of much more recent origin. It was known to the Greeks, but became a significant supplement to bronze during
2808-588: The Russian language . Hills that are over 50 m high, but do not reach the tree line are referred to as vaara , while the general term for hills including hills of 50 m or less is mäki . In place names, however, tunturi , vaara and vuori are used inconsistently, e.g. Rukatunturi is technically a vaara , as it lacks alpine tundra. The term förfjäll (literally "fore-fell") is used in Sweden and Finland to denote mountainous zones lower and less dissected than
2886-499: The University of Bergen , Anders Lundeberg, has summed up the problem by stating, "There simply is no fixed and unambiguous definition of fjell ." Ivar Aasen defined fjell as a "tall berg ", primarily referring to a berg that reaches an altitude where trees do not grow, lower berg are referred to as "berg", ås (hill, ridge) or hei (moor, heathland). The fixed expression til fjells refers to mountains (or uplands) as
2964-525: The Vinča culture date to 4500 BC. Sumerian and Egyptian artifacts of copper and bronze alloys date to 3000 BC. Egyptian Blue , or cuprorivaite (calcium copper silicate) is a synthetic pigment that contains copper and started being used in ancient Egypt around 3250 BC. The manufacturing process of Egyptian blue was known to the Romans, but by the fourth century AD the pigment fell out of use and
3042-649: The alpine tree line . In northern England, especially in the Lake District and in the Pennine Dales , the word "fell" originally referred to an area of uncultivated high ground used as common grazing usually on common land and above the timberline. Today, generally, "fell" refers to the mountains and hills of the Lake District and the Pennine Dales. Names that originally referred to grazing areas have been applied to these hilltops. This
3120-548: The 9th or 10th century AD. Carbon dating has established mining at Alderley Edge in Cheshire , UK, at 2280 to 1890 BC. Ötzi the Iceman , a male dated from 3300 to 3200 BC, was found with an axe with a copper head 99.7% pure; high levels of arsenic in his hair suggest an involvement in copper smelting. Experience with copper has assisted the development of other metals; in particular, copper smelting likely led to
3198-517: The Bronze Age and a shift towards an increased production of ornamental copper objects occurred. Natural bronze, a type of copper made from ores rich in silicon, arsenic, and (rarely) tin, came into general use in the Balkans around 5500 BC. Alloying copper with tin to make bronze was first practiced about 4000 years after the discovery of copper smelting, and about 2000 years after "natural bronze" had come into general use. Bronze artifacts from
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3276-541: The Middle East; a copper pendant was found in northern Iraq that dates to 8700 BC. Evidence suggests that gold and meteoric iron (but not smelted iron) were the only metals used by humans before copper. The history of copper metallurgy is thought to follow this sequence: first, cold working of native copper, then annealing , smelting , and, finally, lost-wax casting . In southeastern Anatolia , all four of these techniques appear more or less simultaneously at
3354-521: The affected areas is highly acidic, with a pH range of 2.1–4.9, and shows elevated electrical conductivity levels between 280 and 1561 mS/cm. These changes in water chemistry make the environment inhospitable for fish, essentially rendering the water uninhabitable for aquatic life. Numerous copper alloys have been formulated, many with important uses. Brass is an alloy of copper and zinc . Bronze usually refers to copper- tin alloys, but can refer to any alloy of copper such as aluminium bronze . Copper
3432-541: The atmosphere; 150 mg/kg in soil; 30 mg/kg in vegetation; 2 μg/L in freshwater and 0.5 μg/L in seawater. Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. Sites include Chuquicamata , in Chile, Bingham Canyon Mine , in Utah, United States, and El Chino Mine , in New Mexico, United States. According to
3510-766: The beginning of the Neolithic c. 7500 BC . Copper smelting was independently invented in different places. The earliest evidence of lost-wax casting copper comes from an amulet found in Mehrgarh , Pakistan, and is dated to 4000 BC. Investment casting was invented in 4500–4000 BC in Southeast Asia Smelting was probably discovered in China before 2800 BC, in Central America around 600 AD, and in West Africa about
3588-531: The company, especially when sourced from fossil fuels, and from engines required for copper extraction and refinement. Companies that mine land often mismanage waste, rendering the area sterile for life. Additionally, nearby rivers and forests are also negatively impacted. The Philippines is an example of a region where land is overexploited by mining companies. Copper mining waste in Valea Şesei, Romania, has significantly altered nearby water properties. The water in
3666-522: The deprotonated amide ligands. Complexes of copper(III) are also found as intermediates in reactions of organocopper compounds, for example in the Kharasch–Sosnovsky reaction . A timeline of copper illustrates how this metal has advanced human civilization for the past 11,000 years. Copper occurs naturally as native metallic copper and was known to some of the oldest civilizations on record. The history of copper use dates to 9000 BC in
3744-461: The depths of the Pacific Ocean approximately 3000–6500 meters below sea level. These nodules contain other valuable metals such as cobalt and nickel . Copper has been in use for at least 10,000 years, but more than 95% of all copper ever mined and smelted has been extracted since 1900. As with many natural resources, the total amount of copper on Earth is vast, with around 10 tons in
3822-563: The discovery of iron smelting . Production in the Old Copper Complex in Michigan and Wisconsin is dated between 6500 and 3000 BC. A copper spearpoint found in Wisconsin has been dated to 6500 BC. Copper usage by the indigenous peoples of the Old Copper Complex from the Great Lakes region of North America has been radiometrically dated to as far back as 7500 BC. Indigenous peoples of North America around
3900-545: The fastest water exchange rate (speed of water ligands attaching and detaching) for any transition metal aquo complex . Adding aqueous sodium hydroxide causes the precipitation of light blue solid copper(II) hydroxide . A simplified equation is: Aqueous ammonia results in the same precipitate. Upon adding excess ammonia, the precipitate dissolves, forming tetraamminecopper(II) : Many other oxyanions form complexes; these include copper(II) acetate , copper(II) nitrate , and copper(II) carbonate . Copper(II) sulfate forms
3978-468: The fell forming the dalehead is ringed with crags. The main faces are Dalehead Crags and Great Gable, not to be confused with the fell of that name . The southern flank of the fell running down to the summit of the Honister Pass road (1,180 feet or 360 metres) has much gentler slopes, although there is outcropping rock on either side. Buckstone Hows and Yew Crag overshadow the road. From the top of
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#17327755239814056-462: The fell proper. However, its more pronounced relief, its often higher amount of plateaux, and its coherent valley systems distinguishes the förfjäll also from the undulating hilly terrain ( bergkullsterräng ) and the plains with residual hills ( bergkullslätt ). Generally, the förfjäll do not surpass 1000 m ASL. As a geomorphic unit, the förfjäll extends across Sweden as a 650 km-long and 40 km to 80 km-broad belt from Dalarna in
4134-488: The fells into three convenient groups. Dale Head is the highest fell in the southern sector. Dale Head is the apex of two hill ridges. The principal ridge descends from Dale Head to the north-east and forms several other fells, each given a chapter by Alfred Wainwright in his Pictorial Guides to the Lakeland Fells. These are High Spy , Maiden Moor and Catbells (alternative spelling, Cat Bells). This ridge forms
4212-800: The junction of the two main Lakeland geological systems, the Skiddaw slates to the north and the Borrowdale Volcanics to the south. On the northern flanks are outcrops of the Buttermere Formation, olistostrome of disrupted sheared mudstone , siltstone and sandstone . Southward march the Borrowdale series beginning with the plagioclase -phyric andesite lavas of the Birker Fell Formation, visible near
4290-511: The later spelling first used around 1530. Copper, silver , and gold are in group 11 of the periodic table; these three metals have one s-orbital electron on top of a filled d- electron shell and are characterized by high ductility , and electrical and thermal conductivity. The filled d-shells in these elements contribute little to interatomic interactions, which are dominated by the s-electrons through metallic bonds . Unlike metals with incomplete d-shells, metallic bonds in copper are lacking
4368-419: The level of <1% Cu. Concentration of the ore is required, which begins with comminution followed by froth flotation . The remaining concentrate is the smelted, which can be described with two simplified equations: Cuprous oxide reacts with cuprous sulfide to convert to blister copper upon heating This roasting gives matte copper, roughly 50% Cu by weight, which is purified by electrolysis. Depending on
4446-472: The modern world. The price of copper is volatile . After a peak in 2022 the price unexpectedly fell. The global market for copper is one of the most commodified and financialized of the commodity markets , and has been so for decades. The great majority of copper ores are sulfides. Common ores are the sulfides chalcopyrite (CuFeS 2 ), bornite (Cu 5 FeS 4 ) and, to a lesser extent, covellite (CuS) and chalcocite (Cu 2 S). These ores occur at
4524-531: The most mountainous region of England, the Lake District is the area most closely associated with the sport of fell running , which takes its name from the fells of the district. "Fellwalking" is also the term used locally for the activity known in the rest of Great Britain as hillwalking . The word "fell" also enjoys limited use in Scotland; with, for example, the Campsie Fells in central Scotland, to
4602-641: The north-east of Glasgow. One of the most famous examples of the use of the word "fell" in Scotland is Goat Fell , the highest point on the Isle of Arran . Criffel and the nearby Long Fell in Galloway may be seen from the northern Lake District of England. Peel Fell in the Kielder Forest is on the border between the Scottish Borders to the north and the English county of Northumberland to
4680-402: The northern slope near the source of Newlands Beck is Dalehead Tarn, while the smaller Launchy Tarn lies near the top of High Scawdel. Dalehead Tarn is a shallow pool providing a popular stopping place for walkers. Its varied flora include water horsetail, sedge and bogbean. Launchy Tarn is smaller and may have been formed by overgrazing and erosion of the underlying peat . Dale Head stands at
4758-516: The numerous copper sulfides , important examples include copper(I) sulfide ( Cu 2 S ) and copper monosulfide ( CuS ). Cuprous halides with fluorine , chlorine , bromine , and iodine are known, as are cupric halides with fluorine , chlorine , and bromine . Attempts to prepare copper(II) iodide yield only copper(I) iodide and iodine. Copper forms coordination complexes with ligands . In aqueous solution, copper(II) exists as [Cu(H 2 O) 6 ] . This complex exhibits
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#17327755239814836-737: The old, highly eroded, gently shaped terrain without glaciers, as found in Finland. They are round inselbergs rising from the otherwise flat surroundings. The tree line can be at a rather low altitude, such as 600 m in Enontekiö, owing to the high latitude. The fells in Finnish Lapland form vestiges of the Karelides mountains, formed two billion years ago. The term tunturi is also generally used to refer to treeless plains at high altitudes in far north regions. The term tunturi , originally
4914-428: The ore, sometimes other metals are obtained during the electrolysis including platinum and gold. Aside from sulfides, another family of ores are oxides. Approximately 15% of the world's copper supply derives from these oxides. The beneficiation process for oxides involves extraction with sulfuric acid solutions followed by electrolysis. In parallel with the above method for "concentrated" sulfide and oxide ores, copper
4992-471: The pass Gatesgarthdale Beck runs north west to Buttermere while Hause Gill flows east to Seatoller and Borrowdale. Across the road is Grey Knotts in the Western Fells. The ridge to Hindscarth departs north west from the summit of Dale Head, soon narrowing into the fine and airy Hindscarth Edge. Both slopes are rocky, that to the south being known as Molds. Far Tongue Gill descends from the north of
5070-575: The pass. The Yew Crag workings on the Dale Head side were operated until 1966, operations on the slopes of Grey Knotts continuing. In 1887 work began to drive a tunnel right under Dale Head into Newlands Valley, connecting with a proposed tramway to join the railway at Keswick. The scheme was abandoned after opposition from landowners. The main workers accommodation at the mine is now the Honister Hause Youth Hostel . The summit
5148-474: The ridge, a tributary of Newlands Beck. Although High Scawdel stands east of the main summit, the high ground takes a great loop to the south around the head of Newlands Beck. It then drives north to the depression at Wilson's Bield (1,655 feet or 504 metres) before climbing to the summit of High Spy. The rest of the North Western Fells bear no tarns worthy of the name, but Dale Head has two. On
5226-750: The secret to its manufacturing process became lost. The Romans said the blue pigment was made from copper, silica, lime and natron and was known to them as caeruleum . The Bronze Age began in Southeastern Europe around 3700–3300 BC, in Northwestern Europe about 2500 BC. It ended with the beginning of the Iron Age, 2000–1000 BC in the Near East, and 600 BC in Northern Europe. The transition between
5304-400: The south to Norrbotten in the north. Copper Copper is a chemical element ; it has symbol Cu (from Latin cuprum ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity . A freshly exposed surface of pure copper has a pinkish-orange color . Copper is used as a conductor of heat and electricity, as
5382-451: The south. In Norway, fjell , in common usage, is generally interpreted as simply a summit or area of greater altitude than a hill, which leads to a great deal of local variation in what is defined as a fjell . Fjell is mostly used about areas above the forest line . Distinct summits can be referred to as et fjell (a mountain). High plateaus ( vidde landscape) such as Hardangervidda are also regarded as fjell. Professor of geography at
5460-438: The sugar is signaled by a color change from blue Cu(II) to reddish copper(I) oxide. Schweizer's reagent and related complexes with ethylenediamine and other amines dissolve cellulose . Amino acids such as cystine form very stable chelate complexes with copper(II) including in the form of metal-organic biohybrids (MOBs). Many wet-chemical tests for copper ions exist, one involving potassium ferricyanide , which gives
5538-640: The summit. The fell has seen extensive mining history. Dale Head Mine was driven below the northern crags for copper , several levels still being visible. Long Work was another copper mine a little further down the valley, worked for malachite and pyrite from Elizabethan times. On the southern flank of the fell, centred on the head of the pass, are the Honister Quarries. These are an extensive system of underground quarries, worked for Green Slate. The earliest extant records date from 1728 and since then huge caverns have been carved out on either side of
5616-399: The top kilometer of Earth's crust, which is about 5 million years' worth at the current rate of extraction. However, only a tiny fraction of these reserves is economically viable with present-day prices and technologies. Estimates of copper reserves available for mining vary from 25 to 60 years, depending on core assumptions such as the growth rate. Recycling is a major source of copper in
5694-685: The top, in effect a mountain tundra . Fjäll is primarily used to describe mountains in the Nordic countries, but also more generally to describe mountains shaped by massive ice sheets, primarily in Arctic and subarctic regions. There are however dialectal differences in usage, with comparatively low mountains or plateaus, sometimes tree-covered, in Bohuslän and Västergötland (e.g. Safjällets nationalpark [ sv ] and Kynnefjäll [ sv ] ) being referred to as "fjäll", similar to how
5772-512: The valley is formed by the High Spy to Catbells ridge, separating it from Borrowdale. Entering on the western side are a series of side valleys which drain the main mass of the North Western Fells. The source of Newlands Beck does not however flow from the apex of Dale Head as might be supposed from the name. Instead it has its birth at the col between the main summit and the eastern top, High Scawdel (1,815 feet or 553 metres). The northern face of
5850-517: The western side of Borrowdale and overlooks Derwent Water . The other ridge descends to the north-west and includes the fells of Hindscarth and Robinson ; it overlooks Gatescarthdale and Buttermere . Dale Head is named for its position at the head of the Newlands Valley. This stretches away due north for three and a half miles before debouching into the floodplain of the Derwent between Derwentwater and Bassenthwaite Lake . The eastern wall of
5928-488: The word is used in Norwegian In Finnish, the mountains characteristic of the region of Lapland are called tunturi (plural: tunturit ), i.e. "fell". A tunturi is a hill high enough that its top is above the tree line and has alpine tundra . In Finnish, the geographical term vuori is used for mountains recently uplifted and with jagged terrain featuring permanent glaciers, while tunturi refers to
6006-527: Was found in 1857 on the Keweenaw Peninsula in Michigan, US. Native copper is a polycrystal , with the largest single crystal ever described measuring 4.4 × 3.2 × 3.2 cm . Copper is the 26th most abundant element in Earth's crust , representing 50 ppm compared with 75 ppm for zinc , and 14 ppm for lead . Typical background concentrations of copper do not exceed 1 ng/m in
6084-547: Was the first metal to be smelted from sulfide ores, c. 5000 BC ; the first metal to be cast into a shape in a mold, c. 4000 BC ; and the first metal to be purposely alloyed with another metal, tin , to create bronze , c. 3500 BC . Commonly encountered compounds are copper(II) salts, which often impart blue or green colors to such minerals as azurite , malachite , and turquoise , and have been used widely and historically as pigments. Copper used in buildings, usually for roofing, oxidizes to form
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