metalliferous sentence in Hindi
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- As the crustal sequence gradually moved off of the spreading axis, there was cessation of the main metalliferous deposition and progressive restriction of water / rock action and eventually water interaction was restricted to within rock units as the crust was sealed off.
- In 1843 he went to take charge of the Gongo Soco mines in Brazil; afterwards he proceeded to India to report on certain metalliferous deposits for the Indian government; and in 1858, impaired in health, he retired and settled at Penzance.
- Surface mining is destroying some of its habitat, but it is not considered to be fragmented, and so is listed as Near Threatened by the IUCN . It can also be found growing in other metalliferous habitats, such as mine debris and lands disturbed by mining.
- The lodes varied in width up to a maximum of around 2.4 ft ( 0.73 m ) and were, at least in the early years of the mine's operation, sometimes of very high quality ore, uncontaminated with other unwanted metalliferous ores.
- Ritson's background in coal was seen as taking the Royal School of Mines in the correct direction but his lack of practical understanding of hard rock metalliferous mining resulted in him spending time in copper and gold mines in South Africa before being allowed to take up the post.
- As stated in the specification of the patent, the claimed discovery related " to improvements in the process for the concentration of ores, the object being to separate metalliferous matter from gangue by means of oils, fatty acids, or other substances which have a preferential affinity for such metalliferous matter over gangue ."
- As stated in the specification of the patent, the claimed discovery related " to improvements in the process for the concentration of ores, the object being to separate metalliferous matter from gangue by means of oils, fatty acids, or other substances which have a preferential affinity for such metalliferous matter over gangue ."
- It was based on the recommendations of a Royal Commission, which had reported in 1864, and which had shown the grave excess of mortality and sickness among metalliferous miners, attributed to the inhalation of gritty particles, imperfect ventilation, great changes of temperature, excessive physical exertion, exposure to wet, and other causes.
- By this time the Cornish mining industry was in sharp decline, as the Metalliferous Mines Regulation Act 1872 and the Factory and Workshop Act 1878 drastically limited the use of the cheap female and child labour on which the industry depended . } } In 1883 the mine was permanently abandoned, and shortly afterwards the engine house was demolished.
- These are cut through in places by igneous intrusions, mainly of dolerite ( quarried at Trusham ), and there was also a degree of metalliferous mineralisation which led to the development of a number of mines around the valley of the River Teign; ores of lead, iron, copper, manganese and barite were mined here, for instance at Wheal Exmouth.
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