Mined Sentence Examples
Iron is mainly mined in Elba.
Manganese is mined in Minas Geraes for export.
The iron ores mined at Daiquiri near Santiago are mainly rich hematites running above 60% of iron, with very little sulphur or phosphorus admixture.
Silver is not mined by itself, but is found in combination with gold.
Salt has been mined there since the 16th century.Advertisement
They are important ores of silver (the pure chloride contains 75.3% of silver), and have been extensively mined at several places in Chile, also in Mexico, and at Broken Hill in New South Wales.
Manganese is mined mainly near La Maya and El Cristo in Oriente.
When these first four galleries were full others were mined on the same level at right angles to them, thus gradually converting the whole area into a net-work of corridors.
The mica mined in India is practically all muscovite.
Copper is mined and extensive deposits of petroleum and asphalt are being exploited.Advertisement
After a diamond is formed, it must then be carefully mined.
Copper is known to exist in all the states, and has been mined extensively in South Australia, New South Wales, Queensland and.
As quarried or mined free sulphur is always contaminated with limestone, gypsum, clay, &c.; the principle underlying its extraction from these impurities is one of simple liquation, i.e.
The quality of ore in the two ranges differs somewhat, that mined from the Vermilion Range being a hard specular or red haematite, while that taken from the Mesabi Range, largely red haematite, is much softer and in many localities quite finely comminuted.
Anglesite, or lead sulphate, PbSO 4, is poor in silver, and is only exceptionally mined by itself; it occurs in quantity in France, Spain, Sardinia and Australia.Advertisement
For the special methods by which placer deposits are mined see Gold.
Those of economic value are kaolin, mined chiefly in the vicinity of Hockessin, New Castle county, the static kaolin product being exceeded in 1903 only by that of Pennsylvania among the states of the United States; granite, used for road-making and rough construction work, found near Wilmington; and brick and tile clays; but the value of their total product in 1902 was less than $500,000.
It has been estimated that down to 1893 1,100,000 tons of ore, yielding metal worth $74,000,000, had been taken from the state, fully half of this having been mined in the preceding twenty years.
The Flemish coal-basin, employing over 100,000 hands, produces 60% of the coal mined in France.
Gothite occurs with other iron oxides, especially limonite and hematite, and when found in sufficient quantity is mined with these as an ore of iron.Advertisement
Iron, coal, copper and manganese are mined.
The chief minerals are sulphur, in the production of which Italy holds one of the first places, iron, zinc, lead; these, and, to a smaller extent, copper of an inferior quality, manganese and antimony, are successfully mined.
Manganese ore is mined for export, and bismuth is reported to have been discovered.
Florida is also the principal source in the United States for fuller's earth, a deposit of which, near Quincy, was first discovered in 1893 and clay (including kaolin) is also mined to some extent.
Among the minerals are silver, platinum, copper, iron, lead, manganese, chromium, quicksilver, bismuth, arsenic and antimony, of which only iron and manganese have been regularly mined.Advertisement
Bituminous coal of an inferior quality is mined to a limited extent in Rio Grande do Sul, and another mine has been opened in Santa Catharina.
There are extensive copper and goldyielding areas, and in some districts these metals are mined.
It is the shipping place for the iron ore mined at Gellivara, 127 m.
Gold and silver are chiefly found in Transylvania, where their exploitation dates back to the Roman period, and are mined at Zalatna and Abrudbanya; rich deposits are also found in the Kremnitz-Schemnitz, and the Nagybanya districts.
Coal is extensively mined in the region of Budapest-Oravicza, Nagybanya, Zalatna, at Brennberg near Sopron, at Salgo-Tarjan, Pecs, in the counties of Krasso-Szoreny, and of Esztergom, and in the valley of the river Zsil.
Mieres is the chief town of a mountainous, fertile and well-wooded region in which coal, iron, and copper are extensively mined and sulphur and cinnabar are obtained in smaller quantities.
The minerals chiefly mined besides gold are diamonds and coal, but the country possesses also silver, iron, copper, lead, cobalt, sulphur, saltpetre and many other mineral deposits.
The Rand reefs, first mined in 1886, cover a large area.
Lode tin, as tinstone derived from primary deposits is often termed, is mined in the ordinary method, the very hard gangue in which it occurs necessitating a liberal use of explosives.
Sulphur is mined near Carupano, and salt in Zulia and on the peninsula of Araya.
Anthracite is mined in the St Lucia Bay district, and bituminous coal is found in the Nqutu and Kyudeni hills.
It is not desirable to leave large areas standing upon pillars in the mine, and as soon as the work on any level is completed the pillar below should be mined out as far as is safe, and the abandoned portion of the mine allowed to cave in and lessen the weight on the pillars elsewhere.
In this case the advanced drift is run underneath the pillar, and the ground below is mined in descending steps.
This method has the advantage of permitting the ore to be sent to the surface as fast as it is mined instead of being left for some months in the stopes for the men to stand upon.
In this the stoping contracts run vertically, the roof in the working-places, and later to control the fall of the roof while the pillars are mined.
The ore as mined is hand-picked and the barren material allowed to remain in the stope where it falls.
These separate areas are then mined in small rooms, each room being timbered as in mining under a weak roof rock.
The floor containing these old haulage roads now becomes the top slice of the one hundred-foot block of ground below and is mined out as described.
Several floors may be mined simultaneously, FIG.
Instead of mining in horizontal floors the filling method permits the ore to be mined in vertical chambers or slices which extend from one level to the next above and from one wall of the deposit to the other.
When a chamber has been excavated and completely filled the slice adjoining is mined out, or at times a block of ground may be left untouched between two filled chambers and then mined out.
The ore is mined in the ordinary way, by pick and shovel if soft, or by the aid of powder if necessary, and the funnel-shaped bottom of the pit is maintained at such an angle that little or no shovelling is required to bring the excavated material to the shaft.
The material as mined will probably not average over 10 per cent.
The church of St John the Baptist, principally Perpendicular, - has in its tower three bells presented by Charles Both this town and the adjacent urban district of Radstock (pop. 3355) have a considerable trade in coal, which is mined in the vicinity.
Coal is mined in the neighbourhood.
Coal is mined in the vicinity; the city has a large trade with the surrounding agricultural district (whose distinctive product is beans); the Michigan Central railway has car and machine shops here; and the city has many manufacturing establishments.
This was a conservative estimate, and was made before the full extent of the reefs was known; in 1904 Lionel Phillips stated that the main reef series had been proved for 61 m., and he estimated the gold remaining to be mined to be worth £2,500,000,000.
Grain and fruit are grown in large quantities, and much coal is mined in the vicinity of Kirksville.
But the earl of Lennox, Darnley's father, understood Moray to mean that as early as January 21-22, 1567, the house of Kirk o' Field, where Darnley was slain, had already been mined.
The town has trade in grain, iron, mined in the vicinity, and leather.
Lead and zinc are mined in much smaller quantities, alum and sulphur are also.
These are little mined at present, only 110 tons of lead ore and 516 tons of zinc ore being taken from the mines in 1908.
Mica is mined near Mrogoro.
It is abundant, for example, in the plastic clay of the Brown Coal formation at Littmitz, near Carlsbad, in Bohemia, at which place it has been extensively mined for the manufacture of sulphur and ferrous sulphate.
Bituminous coal is extensively mined in the vicinity.
The first important coal-mining was near Bellingham Bay, in Whatcom county, where coal was discovered in 1852 and where 5374 tons were mined in 1860.
It contains the largest copper producing district in the world, and in 1907 mined more copper than any other state or territory except Arizona; this metal constituted nearly three-fourths in value of the state's mining products in 1907, the total value being $60,663,511 and that of copper $44, 8 5 2, 75 8.
Coal was discovered in Montana before 1880, when 224 tons were mined.
Silver was raised in the 12th century, and argentiferous lead is still the most valuable ore mined; tin, iron and cobalt rank next, and coal is one of the chief exports.
Anthracite coal is mined here; there are railway repair and machine-shops; and among the borough's manufactures are hosiery, silk goods, underwear and adding machines.
Coal and ironstone are mined; there are iron-works, and bricks, hats, ribbons and tape and silk are made.
The opal was mined here Boo years ago, and the largest piece hitherto found, weighing 2940 carats and estimated to have a value of £175,000, is preserved in the Court Museum at Vienna.
For ten years after the Black Hills were thrown open little gold was mined because of the lack of railway facilities.
The total amount of gold mined in 1908 was 374,529 fine ounces, the greater part coming from the Homestake Mine In 1908, 197,300 oz.
The lignite in this region also warms the ranchman's cabin, being easily mined where a seam is exposed in the walls of a ravine or on the side of a hill.
Rubies and sapphires are mined in the Chantabun district in the south-east.
Coal, ironstone and clay are mined in close proximity, and every sort of iron and steel goods is produced.
The yield of iron ore is almost one million tons annually, while gold, silver, tin, graphite and salt are also mined.
Cryolite, a fluoride of aluminium and sodium, is extensively mined in Greenland and elsewhere for industrial purposes.
Bathurst is the centre of the chief wheat-growing district of New South Wales, while gold, copper and silver are extensively mined in its vicinity.
The coal deposits, which form a part of the well-known Cumberland field, furnish by far the most important mineral product of the state; more than 98% of this, in 1901, was mined in Allegany county from a bed about 20 m.
The bituminous is of excellent quality for the manufacture of coke and gas, but up to 5902 had been mined only in small quantities.
Nearly all the high grade blacksmithing coal mined in the United States comes from Maryland.
Some of the coal mined in eastern Kentucky is an excellent steam producer, especially the Jellico coal of Whitley county, Kentucky, and of Campbell county, Tennessee.
But with the exception of that mined in Hopkins and Bell counties, very little is fit for making coke; in 1880 the product was 4250 tons of coke (value $12,250), in 1890, 12,343 tons ($22,191); in 1900, 95,532 tons ($235,505); in 1902, 126,879 tons ($3 1 7, 8 75), the maximum product up to 1906; and in 1907, 67,068 tons ($157,288).
Coal was first mined in Kentucky in Laurel or Pulaski county in 1827; between 1829 and 1835 the annual output was from 2000 to 6000 tons; in 1840 it was 23,527 tons and in 1860 it was 285,760 tons.
In 1902 it was mined only in Bath, Lyon and Trigg counties, of which the total product was 71,006 long tons, valued at only $86,169; in 1904 only 35,000 tons were mined, valued at the mines at $35,000.
Lead and zinc are mined in small quantities near Marion in Crittenden county and elsewhere in connexion with mining for fluorspar; in 1907 the output was 75 tons of lead valued at $7950 and 358 tons of zinc valued at $4 2, 2 44.
Iron was not known, but copper and tin ores were mined, and the metals combined into bronze of much the same alloy as in the Old World, of which hatchet blades and other instruments were made, though their use had not superseded that of obsidian and other sharp stone flakes for cutting, shaving, &c. Metals had passed into a currency for trading purposes, especially quills of gold-dust and T-shaped pieces of copper, while coco-beans furnished small change.
The coal, however, is not mined, and much of the destruction of timber in southern Bechuanaland was caused by the demand for fuel for Kimberley.
The first metal other than iron mined by whites within the territory of the United States was lead, the discovery of which on the American continent was recorded in 1621.
Copper was the next metal to be mined, so far as is known.
No silver was obtained in the country, except what was separated from the native gold, that mined in California containing usually from 8 to 10% of the less valuable metal.
The total production of coal from 1814 (the year in which anthracite was first mined in Pennsylvania) to 1908 amounted to 7,280,940,265 tons, which represented an exhaustionadding 50% for waste in mining and preparationof 11,870,049,900, or four-tenths of I% of the supposed original supply.
Up to 1870 there was more anthracite mined in Pennsylvania than bituminous in the whole country, but since that year the production of the latter has become vastly the greater, the totals in 1907, in which year each stood at its maximum, being 83,268,754 and 332,573,944 tons respectively.
In 1907 iron ore was mined for blast-furnace use in twenty-nine states only, but the ore occurs in almost every state of the Union.
Of these districts the Lake Superior regionwhich embraces the Marquette range (opened in 1854), the Menominee (1872), the Gogebic (1884), the Vermilion (1884) and the Mesabi (1892)first attracted exploration about 1844, when the copper deposits of the same region were opened, and produced from 1854 to 1908 a total of 1/210,239,551 long tons, of which 341,036,883 were mined in the period 1889-1908.
Magnetite production was confined to mountain regions in the east and west, and only in Ohio were carbonates mined.
Coal of a bituminous and also semi-anthracite kind is produced, the best mined on the Pacific slope of the continent, the coking coals of the Fernie region supplying the fuel of the great metal mining districts of the Kootenays in British Columbia, and of Montana and other states to the south.
Copper, lead, silver and all the important metals are mined in the Rocky Mountain district.
In the vicinity large quantities of coal are mined, for which the city is an important shipping point.
Coal is mined in the vicinity, and near the city are large market-gardens, the water-melons growing on Muscatine Island (below the city) and sweet potatoes being their most important products.
In 1880 the output of coal (anthracite and bituminous) in Pennsylvania was 66% of that of the entire country; in 1908 it was 48.2%; but in the latter year the Pennsylvania mines produced more coal than the combined production of all the countries of the world excepting Great Britain, Germany and Austria-Hungary, and it was nearly four times as much as the total mined in Austria, nearly five times as much as that mined in France, and seven times as much as the output of Russia in that year.
The term survives in the Forest of Dean, for leases granted to the "free miners" of the forest, granted by the "gaveller" or agent of the crown, and the term is also applied to the royalty paid to the crown, and to the area mined.
Very few of the ores which are mined to-day contain less than 25% of iron, and some of them contain over 60%.
But, intermediate in richness between these two extremes, the iron ores mined to-day and these 2 and 3% ores, there is an incalculably great quantity of ore capable of mechanical concentration, and another perhaps vaster store of ore which we do not yet know how to concentrate mechanically, so that the day when a pound of iron in the ore will cost as much as a pound of copper in the ore costs to-day is immeasurably distant.
About two-thirds of the ore mined is clayey siderite.
In addition 7,344,786 tons, or about half as much as was mined in Great Britain, were imported, 7 8.5% of it from Spain.
The middle states, New York, New Jersey and Pennsylvania, are known to have many great deposits of rich magnetite, which supplied a very large proportion of the American ores till the discovery of the very cheaply mined ores of Lake Superior.
Russia's most valuable ore deposit is the very large and easily mined one of Krivoi Rog in the south, from which comes about half of the Russian iron ore.
The American ores now mined are decidedly richer than those of most European countries.
The stone can hardly have become familiar to the Romans until introduced from India, where it was probably mined at a very early period.
Diamonds are also mined at Salobro on the river Pardo not far inland from the port of Canavieras in the S.E.
In addition to the South American localities mentioned above, small diamonds have also been mined since their discovery in 1890 on the river Mazaruni in British Guiana, and finds have been reported in the gold washings of Dutch Guiana.
The total yield of mined salt amounted in 1905 to 6,209,000 tons, including 1,165,000 tons of rock salt.
From these rocks in the Ottawa valley are quarried or mined granite, marble, magnificent blue sodalite, felspar, talc, actinolite, mica, apatite, graphite and corundum; the latter mineral, which occurs on a larger scale here than elsewhere, is rapidly replacing emery as an abrasive.
Several metals have been mined also, including gold, copper, lead, iron and arsenic; but the amounts produced have not been great, and many of the mines are no longer working.
Up to the present the most important mineral product of Ontario is nickel, which is mined only in the neighbourhood of Sudbury, where the ores occur in very large deposits, which in 1905 produced 95 0 3 tons, more than half of the world's supply of the metal.
The province supplies over two-thirds of the iron ore mined in the Dominion, but much is still imported.
Among the less important metals and minerals which are also mined, is corundum of especial purity.
The most important Sicilian mineral is undoubtedly sulphur, which is mined principally in the provinces of Caltanissetta and Girgenti, and in minor quantities in those of Palermo and Catania.
Clay for the "Baggers," or cases in which the wares are fired, is mined in the vicinity, but the raw materials for the fine grades of pottery are obtained elsewhere.
The city is a trading centre for a prosperous farming region, and coal is mined in the vicinity.
In ancient times gold and precious stones were mined in the Red Sea hills.
The mineral occurs generally in lenticular deposits, which may reach a thickness of more than loo ft.; but it is mined only to a limited extent, most of the salt being obtained from brine springs and wells which derive their saline character from deposits of salts.
Rock-salt is mined in several states, as New York, Kansas and Louisiana; but American salt is mostly obtained from brine.
Coal is mined in the valley of the Zsil, but the abundance of timber has retarded its exploitation.
It is situated in a fine agricultural region; coal is mined in the vicinity; natural gas is obtained in abundance; and the city has various manufactures.
A little coal is mined and some rye, wheat, oats, barley and vegetables are grown, although the period during which vegetation can grow averages less than ioo days.
A small quantity of zinc is mined in Dumfriesshire and of barytes at Lochwinnoch in Renfrewshire.
The precious metals were once worked at Abington in Lanarkshire and in the Ochils, and lead was mined at Tyndrum in Perthshire.
Copper and quicksilver were mined in the Zizima district, north of Iconium.
Quicksilver has been mined at Azogues, in the province of Canar, and is also to be found in Azuay.
In 1679 Hennepin reported deposits of coal near what is now Ottawa on the Illinois; there was some mining in 1810 on the Big Muddy river in Jackson county; and in 1833, 6000 tons were mined.
Nearly 30% of all coal mined in the state was mined by machinery in 1907.
These are mined at Nanaimo, Ladysmith and other points.
Red ochre, for which there is only a limited market, is mined on Ormuz, Abu Musa and other islands in the Gulf; salt, as deposits, on Ormuz and Qishm I., and by evaporation, near Mohammerah, Fao and elsewhere on both sides of the Gulf; gypsum is widely distributed throughout the Gulf; iron, as haematite and pyrites, widely found through the Ormuz series.
Lower Palaeozoic strata lap up on to the crystalline rocks on all sides of the mountain group. The region is rich in magnetic iron ores, which though mined for many years are not yet fully developed.
By them are deter mined all matters ofeace or war, legislation taxation p ?
Zinc, lignite and common salt are mined, but the output is small and of slight value.
Copper has risen in importance in very recent years; it is mined mainly in Shasta county; the value of the state's total product in 1905 was $2,588,111.
This has been mined since 1824; the output was greatest from 1875-1883, when it averaged about 43,000,000 pounds.
Chrysoprase, mined near Porterville and near Visalia (Tulare county), is used partly for gems, but more largely (like the vesuvianite found near Exeter, in the same county) for mosaic work; and there are ledges of fine rose quartz in the Coahuila mountains of Riverside county and near Lemon Cove, Tulare county.
It thus resembles magnetite in external characters, but is readily distinguished from this by the fact that it is only slightly magnetic. It is found in considerable amount, associated with zinc minerals (zincite and willemite) in crystalline limestone, at Franklin Furnace, New Jersey, where it is mined as an ore of zinc (containing 5 to 20% of the metal); after the extraction of the zinc, the residue is used in the manufacture of spiegeleisen (the mineral containing 15 to 20% of manganese oxides).
Extensive deposits are mined in the United States, particularly at Butte in Montana, and in Namaqualand, South Africa.
Coal was first mined in what is now Wyoming in 1865, probably in connexion with the building of the Union Pacific railway, and the product in that year was Boo short tons.
Manganese ore-mining began in Virginia in 1857 in the Shenandoah Valley, and the product increased from about 100 tons in that year to about 5000 tons (mined near Warminster, Nelson county) in 1868 and 1869.
Between 1885 and 1891 the average annual production was about 15,000 tons, the greatest output20,567 tons - being mined in 1886.
Asbestos was formerly mined in the western and south-western parts of the state.
Barytes is mined near Lynchburg; the value of the output in 1907 was $32,833, since which date the output has decreased.
But very little iron is mined, in 1907 only 11,714 long tons, valued at $21,085.
Only silver is mined in the last-named county.
Copper has been mined for many years, and in 1906 and 1908 constituted New Mexico's most valuable metallic product, the value of the yield in these years being $ 1, 35 6, 533 and $658,858 respectively.
Iron ores are widely distributed, but have not been developed; graphite is mined in Colfax county; mica in Taos county, and to a small extent in Rio Arriba county; marble is quarried in Otero county and sandstone in Bernalillo, Colfax and San Miguel counties.
In New Mexico are found turquoises and a few garnets; it seems probable that turquoises were mined by the Aztecs.
Coal is mined in the vicinity.
Lignite and coal, some graphite and kaolin, are mined, as also amber, which is often found in big lumps.
A number of gold reefs intersect the surrounding district and in some of the reefs gold is mined.
Bloomington's prosperity increased after 1867, when coal was first successfully mined in the vicinity.
Copper has been mined at Falun since the 14th century; it is also produced at Atvidaberg in Ostergotland.
Manganese ores are mined in Atacama and Coquimbo, and their export is large.
Copper is mined in southern Portugal.
Petroleum has been found near Torres Vedras; pitchblende, arsenic, anthracite and zinc are also mined.
The production of the next richest county, Owyhee, in 1907, was less than one tenth that of Shoshone county, which yields, besides, about one half of the lead mined in the United States, its product of lead being valued at $9,851,076 in 1904, at $14,365,265 in 1906, and at $12,232,233 (state report) in 1907.
Idaho was the first of the states in its output of lead from 1896, when it first passed Colorado in rank, to 1906, excepting the year 1899, when Colorado again was first; the value of the lead mined in 1906 was $ 1 4,535, 82 3, and of that mined in 1907 (state report), $12,470,375.
High grade copper ores have been produced in the Seven Devils and Washington districts of Washington county; there are deposits, little developed up to 1906, in Lemhi county (which was almost inaccessible by railway) and in Bannock county; the copper mined in 1905 was valued at $1,134,846, and in 1907, according to state reports, at $2,241,177, of which about two-thirds was the output of the Cceur d'Alene district in Shoshone county.
Coal is mined round Kladno, Buschtehrad, Pilsen, Schlan, Rakonitz, Niirschan and Radnitz, the lastnamed place containing the oldest coal mines of Bohemia (17th century).
Copper mining in the state began about the same time as iron mining, and the quantity mined increased from 12 long tons in 1845 to 102,543 in 1906 (in 1907, 97,175 long tons).
From 1847 to 1887 the product of Michigan exceeded that of any other state; from 1847 to 1883 its copper product was more than one-half that of all the states, but after 1887 (except in 1891) more of that mineral was mined in Montana than in Michigan, and in 1906 and in 1907 the yield in both Arizona and Montana was greater than in Michigan.
Operations on the deposit near Grand Rapids were begun in 1841, and although that near Alabaster was opened in 1862, it was not until 1902 that it became of much importance; in that year the output of the state was 208,563 short tons; in 1907 317,261 short tons were mined.
The total value of the lumber and timber products, the furniture products, and the planing-mill products amounted in 1900 to $80,999,685; the value of those manufactures based upon minerals mined or quarried amounted in the same year to $83,730,930.
In New Jersey the mining of clays is more important than in any other state, the amount mined and sold in 1902 being a third of the entire output of the United States, and the amount in 1907 (44 0, 1 3 8 tons) being more than one-fifth of all clay mined and sold in the United States; and in 1907 in the value of clay products ($16,005,460; brick and tile, $9,019, 834, and pottery, $6,985,626) New Jersey was outranked only by Ohio and Pennsylvania.
Bog ores were mined until about 1840; since that date they have had no market.
Coal, limestone and ironstone are mined in the neighbourhood.
Iron is mined in the Oberland, and large quantities of salt are yielded by the brine springs of Heinrichshall.
About 1896 some remarkably white and pure feldspar began to be quarried in Androscoggin, Oxford and Sagadahoc counties, but afterwards the spar mined in Maine was of less excellent quality; in 1907 the production in Maine was valued at $157,334, the total for the entire country being $499, 06 9.
Nevada is a trading centre for the surrounding country, and a fine farming and stock-raising region, in which Indian corn, oats, wheat, clover, timothy and blue-grass are grown; coal is mined in the vicinity.
In the Wallega district are veins of gold-bearing quartz, mined to a certain extent.
The principal source of the silver was the lead ores mined, from which in 1908 about two-thirds of the total of the silver was secured.
In 1908 more than two-thirds of the total output was from the low-grade porphyry ores mined at Newhouse, Beaver county, and at Bingham, Salt Lake county.
The only important region of coal mining in the state up to 1910 was in Carson county, where more than nine-tenths of the total output of the state was mined in 1907 and in 1908.
Coal, limestone and ironstone are mined.
Deposits of rock-salt, a valuable government monopoly, stretch from the department of Suceava in northern Moldavia to that of Gorjiu in Walachia, and are mined in the departments of Bacau, Prahova and Ramnicti Sarat.
Copper occurs in various localities, but is of economic importance only in the Ozark uplift; it was first mined in small quantities in 1837.
The value of the copper mined in 1906 (based on smelter returns) was $54,347.
The so-called "Joplin district" of south-western Missouri and south-eastern Kansas-three-fourths of it being in Missouri-produces ninetenths of all the zinc mined in the United States.
The gems are found in a matrix of black slate in what appears to be the crater of a volcano, and are mined in a very crude manner.
Coal is also found at several widely-separated places, but is not mined.
Salt is mined at Zipaquira, near Bogota, and being a government monopoly, is a source of revenue to the national treasury.
The copper mines are in Namaqualand, an average of 50,000 to 70,000 tons of ore being mined yearly.
Asbestos is mined near Prieska, in which neighbourhood there are also nitrate beds.
Danao has a comparatively cool and healthy climate, is the centre of a rich agricultural region producing rice, Indian corn, sugar, copra and cacao, and coal is mined in the vicinity.
At Kanopolis in Ellsworth county, at Lyons in Rice county and at Kingman, Kingman county, the salt is mined and sold as rock-salt.
The principal ores are galena, sphalerite or zinc blende and smithsonite or zinc carbonate, which is locally called "dry bone" and which was the first zinc ore mined in the state.
Red haematite was mined in Dodge county before 1854; in 1877 the deposits in Florence (disambiguation)|Florence county were first worked, and in 1882 276,017 tons were shipped from that county; and about 1884 began the development of the Gogebic deposits in Iron and Ashland counties.
The mineral resources include coal, iron, silver, gold and petroleum, the first alone is mined.
East Turkestan contains several minerals, such as gold, mined to a very small extent in the Kuen-lun Mountains; lead found in the country west of Kashgar and once worked in the Kuruk-tagh, and copper and petroleum near Kashgar; coal exists in abundance in the Kulja valley and is found at Ak-su, Korla, Kara-shahr, Turfan and Hami on the northern verge of the deserts.
Gold is mined to a small extent; the most productive mines are about Darien and in Cocle province.
Cumberland has a large trade in coal, which is mined in the vicinity.
Antimony is mined at Zayechar.
The purest flints have the most perfect conchoidal fracture, and prehistoric man is known to have quarried or mined certain bands of flint which were specially suitable for his purposes.
Since the Spanish conquest their huacas have been opened and rifled, and many of the larger masses of ruins have been extensively mined in search of treasure, but enough still remains to impress upon the observer the magnitude of the city and the genius of the people who built it.
The amount mined in 1868 was 12,262 long tons; in 1902, 313,365 long tons; and in 1908, 225,495 long tons, valued at 989,881.
Minerals which were not mined commercially in 1902 include asbestos, which occurs in Spartanburg and Pickens counties; fullers'-earth; graphite in Spartanburg and Greenville counties; iron ores in the north and north-west portions of the state; iron pyrites in Spartanburg and York counties; talc, bismuth, ochre, pyrites, ' galena, brown coal, malachite, phosphate of lead and barytes.
They are chiefly confined to the mountains, where iron, coal, copper, lead, zinc, silver and sulphur are mined in small quantities.
Rome is situated in a rich agricultural region producing cotton, cereals, vegetables and fruits, for which it is a trading centre, and is a shipping point for bauxite, mined in the vicinity.
It deter P Y mined that the unity of Germany should be brought about not by revolutionary means as in 1848, not as in 1849 had been attempted by voluntary agreement of the princes, not by Austria, but by the sword of Prussia.
Copper was mined in East Granby as early as 1705 and furnished material for early colonial and United States coins.
Limestone, for the reduction of lime, is also mined; and beryl, clays and mineral springs yield products of minor importance.
In 1908 the product was 6,199,171 tons, valued at $7,118,499 Iron ore is found and has been mined in many places in the state.
Copper has been mined here since 1847, and notwithstanding the difficulties of transportation through a rough mountain region, mines were rapidly developed, and in 1855 over 14,000 tons of ore, worth more than a million dollars, were marketed.
In 1908, 618,806 short tons of ore were mined, producing, from the smelters on the ground, 19,710,103 lb of metallic copper.
Zinc ore is mined on a small scale in the eastern part of the state, the product in 1908 being 341 short tons of metallic zinc valued at $32,054.
Among the other minerals found and mined to a limited extent are lead, manganese, barytes, fluorspar, slate, granite and petroleum.
The land is heavily mined, and with winter setting in the fields remain barren.
Between these facings was a rubble core of locally mined flint held together by mortar.
Traditionally the woods were coppiced to provide charcoal for the forge which processed ore from locally mined ironstone.
The site of Bole Hill Quarry is then passed, where in the 18th century ironstone was mined.
For example, in order to extract a single ounce of platinum, about 10 tons of ore need to be mined.
In return had to pass over half the lead mined to the government's imperial procurator to be given to the government.
The seams are principally above water levels and in many cases have been laid bare by erosion; and the supply is varied - besides a " fat coking, gassy bituminous," there are an excellent grade of splint coal (first mined in 1864 at Coalburg, Kanawha county) and (except that in Kentucky) the only important supply of cannel coal in the United States.
The Baltic amber or succinite is found as irregular nodules in a marine glauconitic sand, known as "blue earth," occurring in the Lower Oligocene strata of Samland in East Prussia, where it is now systematically mined.
When the original area had been mined in this way as far as was consistent with stability, a second storey of galleries was begun at a lower level, reached by a new staircase.
Tin is also mined in Katanga, but up to 1921 little had been done to exploit its iron and gold deposits and diamondiferous areas.
But why did they not blow up the bridge, if it was mined?
It is believed that iron ore has been mined and smelted in the area since Norman times.
A unique design feature of the lovely entertainment center is a beautiful lighted scene cut from a sheet of steel originally mined in Minnesota at the Cuyuna Iron Range.
The uranium that is used in the reactor to create the nuclear energy must be mined, transported, contained in ceramic pellets, and packed into tubes which are brought to the reactor.
Coal must be mined to be removed from the earth.
Some uranium is deeper in the ground and must be deep mined like coal.
With colors mined from the very earth, shades are limitless.
Because mineral makeup is mined and milled naturally from the earth's resources, blushes and powders do not offer the same consistency as cream or fluid products.
This may mean choosing a local stone, such as Dakota Mahogany rather than one mined overseas, but the savings can be substantial.
Since Black Hills gold refers to the tricolor gold and the motif of the grapes and grape-leaves rather than a specific type of mined gold, many jewelers may claim to sell Black Hills gold jewelry.
Canary diamonds are actually quite rare, comprising less than one-tenth of a percent of all natural diamonds mined and cut for use in the jewelry trade.
As word spread of this new stone, miners rushed to the area to seek out the stone and between two million carats of gem quality tanzanite had been mined.
It is more widely mined, making it much less rare.
Platinum is far more rare than gold, and is principally mined in Russia and South Africa, whereas high-quality gold is found in many more locations.
After a stone is mined, local diamond shop owners in mining regions purchase them in bulk.
After a diamond is mined it may be measured to weigh several carats, but that is only the beginning of its processing.
Lux explains, "Gemesis lab-created diamonds have the same properties as those that are mined, and they emerge as rough diamonds.
They have the same exceptional cut, color and clarity as the highest quality mined diamonds."
Lux notes, "Both gem-quality colorless and yellow Gemesis-created diamonds retail for significantly less than their mined counterparts.
Chocolate diamonds are brownish colored, a hue that occurs in 0.1% of the stones mined.
Some consumers consider lab-created and other synthetic and imitation diamonds to be fake, even if they share the same physical and chemical properties as naturally mined stones.
Consumers should be aware that many ways to distinguish between real and fake stones will not be able to tell the difference between naturally mined stones and man made diamonds.
Diamond is actually a misnomer for the double-terminated quartz crystals mined here, which are believed to be over 500 million years old.
Recent developments have resulted in man-made gemstones which share many of the qualities of naturally mined gemstones.
However, the various metals used in the mixing process have not necessarily been mined in South Dakota.
Seismic events bring these diamonds to the surface of the earth, where they are mined, cut, and turned into jewelry.
A few Irish jewelry retailers, such as Galantas, specialize in wedding rings made from gold mined in Ireland.
There are many lab-created stones claiming to be blue diamonds mined in Africa.
And titanium itself is also very eco-friendly as it is available in abundance and easily mined, unlike gold and silver.
Since 1863, Frye has been making footwear that has walked the battlefields of the Civil War and the Spanish American War, mined for gold during the Gold Rush, and gone West with the Pioneers of the late 1800s.
Live 365 - What better way to get to know soundtracks that to listen to soundtracks carefully mined for the best tracks by longtime soundtrack fans?
Lignite is also mined at Bacu Abis, near Gonnesa, and Anthracite in small quantities near Seui.
Copper and mispickel are mined only in small quantities.
Bismuth is known to exist in all the Australian states, but up to the present time it has been mined for only in three states, viz.
Iron, zinc and lead are found in the vicinity, and some coal is mined.
Gold has been mined in the Urals since 1820; but since 1892 the output has fallen off very considerably.
A sub-bituminous lignite is mined in Esmeralda county (800 tons in 1906; 330 tons in 1907).
The state has two small areas in which bituminous coal occurs; one in the basin of the Dan and one in the basin of the Deep. Very little coal was produced in the state until the Civil War, when, in 1862 and again in 1863, 30,000 short tons were obtained for the relief of the Confederate government, an amount which up to 1905, when the yield was only 1557 short tons (falling off from 7000 short tons in 1904), had not since been equalled; in 1906, in 1907 and in 1908 no coal was mined in the state.
Rock-filling will be used whenever a large proportion of barren material must be mined with the ore.
Several floors can be mined simultaneously, the work in the lower floors being kept well in advance.
Silver also was once mined.