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1 Markets I: The Ecosystem and Exchange-Traded Marketsবাজার অনলাইন 2 Markets II: Rates, FX and Creditবাজার অনলাইন 3 Markets III: Commodities, Energy and Cryptoবাজার অনলাইন 4 Quantitative Methodsপদ্ধতি অনলাইন 5 Derivatives and Volatilityডেরিভেটিভস অনলাইন 6 Rates, Credit, XVA and Riskসুদহার, ঋণ ও ঝুঁকি অনলাইন 7 Research Craft: Predictors, Backtests, Measurement, Portfoliosগবেষণা অনলাইন 8 Strategies I: Equities and Futuresকৌশল অনলাইন 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desksকৌশল অনলাইন 10 Microstructure and Executionএক্সিকিউশন অনলাইন 11 Market Making and High-Frequency Tradingমার্কেট মেকিং অনলাইন 12 Machine Learning for Marketsমেশিন লার্নিং অনলাইন 13 Low-Latency Softwareপ্রযুক্তি অনলাইন 14 Networks, Hardware and Trading Infrastructureপ্রযুক্তি অনলাইন 15 Research, Data and Risk Platformsপ্রযুক্তি অনলাইন 16 The Desk and the Firmপ্রতিষ্ঠান অনলাইন 17 The Industry: Firms, Roles and Careersক্যারিয়ার অনলাইন 18 Interviews I: Maths, Probability and Speedক্যারিয়ার অনলাইন 19 Interviews II: Markets, Trading Games and the Final Roundক্যারিয়ার অনলাইন 20 Interviews III: Codeক্যারিয়ার অনলাইন
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Earth and Space Sciences · পরিভাষা

Coal; coalification; rank কী?

অন্য নাম: coal · coalification · rank (of coal)

Definition 18.11 High School Earth and Space Sciences · অধ্যায় 18 — The Geology of Coal, Oil and Gas

Coal is a sedimentary rock made mostly of the remains of land plants, rich in carbon. Coalification is the transformation of peat into coal and of coal into richer coal, by burial and heating. The rank of a coal is how far coalification has gone: from lignite through subbituminous and bituminous coal to anthracite, the carbon content rises.

Top left: carbon content of the ranks of coal. Data: U.S. Energy Information Administration. Top right: a bed of lignite, the black band under pale sands, exposed in a mine in Romania; photograph U.S. Geological Survey (public domain). Bottom, from left: lignite, about 4.5\, cm across, brown-black and dull; bituminous coal, with flattened plant fragments; anthracite, black and glassy. Photographs James St. John (CC BY 2.0). Top left: carbon content of the ranks of coal. Data: U.S. Energy Information Administration. Top right: a bed of lignite, the black band under pale sands, exposed in a mine in Romania; photograph U.S. Geological Survey (public domain). Bottom, from left: lignite, about 4.5\, cm across, brown-black and dull; bituminous coal, with flattened plant fragments; anthracite, black and glassy. Photographs James St. John (CC BY 2.0). Top left: carbon content of the ranks of coal. Data: U.S. Energy Information Administration. Top right: a bed of lignite, the black band under pale sands, exposed in a mine in Romania; photograph U.S. Geological Survey (public domain). Bottom, from left: lignite, about 4.5\, cm across, brown-black and dull; bituminous coal, with flattened plant fragments; anthracite, black and glassy. Photographs James St. John (CC BY 2.0). Top left: carbon content of the ranks of coal. Data: U.S. Energy Information Administration. Top right: a bed of lignite, the black band under pale sands, exposed in a mine in Romania; photograph U.S. Geological Survey (public domain). Bottom, from left: lignite, about 4.5\, cm across, brown-black and dull; bituminous coal, with flattened plant fragments; anthracite, black and glassy. Photographs James St. John (CC BY 2.0).
Top left: carbon content of the ranks of coal. Data: U.S. Energy Information Administration. Top right: a bed of lignite, the black band under pale sands, exposed in a mine in Romania; photograph U.S. Geological Survey (public domain). Bottom, from left: lignite, about 4.5 cm4.5\,\mathrm{cm} across, brown-black and dull; bituminous coal, with flattened plant fragments; anthracite, black and glassy. Photographs James St. John (CC BY 2.0).
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