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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

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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 Oceanic crust; oceanic lithosphere？

又称： oceanic crust · oceanic lithosphere

Definition 14.3 High School Earth and Space Sciences · 第 14 章 — Ocean Ridges and the Oceanic Lithosphere

The oceanic crust is the crust of the ocean floor: about $7\,\mathrm{km}$ of basalt and gabbro, made at the ridges. The oceanic lithosphere is the oceanic crust together with the rigid peridotite of the uppermost mantle beneath it.

The layers of the oceanic crust, to scale in depth. The thicknesses of the lavas and dykes are those of the deep hole drilled in the eastern Pacific; the total thickness is the average from seismic surveys. The sediment cover grows thicker with the age of the floor.

Pillow lava on the Galápagos Rift, about 2500 metres down, photographed by a remotely operated vehicle in 2011. Each pillow is a tongue of lava that froze from the outside the moment it met the cold sea water. Photograph: NOAA Okeanos Explorer Program (public domain).

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