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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Hadean, Archean, Proterozoic？

又称： Hadean · Archean · Proterozoic

Definition 18.1 University Earth and Space Sciences — Year 2 · 第 18 章 — The Precambrian Earth

The time before the Phanerozoic is divided into three eons. The Hadean runs from the formation of the Earth, $4567\,\mathrm{Ma}$ ago, to $4031 \pm 3\,\mathrm{Ma}$ ; the Archean from $4031$ to $2500\,\mathrm{Ma}$ ; the Proterozoic from 2500 to $538.8\,\mathrm{Ma}$ , the base of the Cambrian. Together they are informally called the Precambrian.

The Precambrian on one line. The eons and, in lighter tints, their eras (Eo-, Paleo-, Meso- and Neoarchean; Paleo-, Meso- and Neoproterozoic) are those of the International Chronostratigraphic Chart; the events are placed at the ages quoted in the text. The “last common komatiites” are the aluminium-undepleted ones; younger, rarer kinds exist.

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