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The history of metallurgy in the Indian subcontinent began prior to the 3rd millennium BCE. [1] Metals and related concepts were mentioned in various early Vedic age texts. The Rigveda already uses the Sanskrit term ayas ( Sanskrit : अयस् , romanized : áyas , lit.
The Sohgaura copper plate inscription is an Indian copper plate inscription written in Prakrit in the Mauryan period Brahmi script. [1] It was discovered in Sohgaura, a village on the banks of the Rapti River, about 20 km south-east of Gorakhpur, in the Gorakhpur District, Uttar Pradesh, India. [2]
Science and Civilization in China: Volume 3. Taipei: Caves Books, Ltd. Povarennykh A.S. (1972) "A Short History of Mineralogy and the Classification of Minerals". Crystal Chemical Classification of Minerals, 3–26. Springer, Boston, MA. ISBN 978-1-4684-1743-2; Ramsdell, Lewis S. (1963). Encyclopedia Americana: International Edition: Volume 19 ...
India imports small amounts of natural gas. In 2004, India consumed about 1,089 × 10 ^ 9 cu ft (3.08 × 10 10 m 3) of natural gas, the first year in which the country showed net natural gas imports. During 2004, India imported 93 × 10 ^ 9 cu ft (2.6 × 10 9 m 3) of liquefied natural gas (LNG) from Qatar. [16]
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 December 2024. Civil services examination in India This article is about the examination in India. For civil service examinations in general, see civil service entrance examination. This article may need to be rewritten to comply with Wikipedia's quality standards. You can help. The talk page may ...
The first eon in Earth's history, the Hadean, begins with the Earth's formation and is followed by the Archean eon at 3.8 Ga. [2]: 145 The oldest rocks found on Earth date to about 4.0 Ga, and the oldest detrital zircon crystals in rocks to about 4.4 Ga, [34] [35] [36] soon after the formation of the Earth's crust and the Earth
The Carboniferous extends from about 358.9 ± 0.4 to about 298.9 ± 0.15 Ma. [10] A global drop in sea level at the end of the Devonian reversed early in the Carboniferous; this created the widespread epicontinental seas and carbonate deposition of the Mississippian. There was also a drop in south polar temperatures; southern Gondwana was ...
They have similar physical and chemical properties, and tend to occur together in the same mineral deposits. [2] However, they can be further subdivided into the iridium-group platinum-group elements (IPGEs: Os, Ir, Ru) and the palladium-group platinum-group elements (PPGEs: Rh, Pt, Pd) based on their behaviour in geological systems. [3]