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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 Condensed section and incised valley？

又称： condensed section · incised valley

Definition 16.7 University Earth and Space Sciences — Year 3 · 第 16 章 — Sequence Stratigraphy

A condensed section is a thin interval deposited very slowly far from the shoreline while the sea floods the shelf and the sediment is trapped near the coast: a few centimetres or decimetres of clay, fossils, glauconite or phosphate that may record a long time. An incised valley is a river valley cut into the exposed shelf while relative sea level falls, and filled during the following lowstand and transgression.

Anatomy of a depositional sequence in a dip section (schematic, vertical scale much exaggerated). The sequence boundary (SB, red) is an unconformity on the shelf, with an incised valley, and a correlative conformity in the basin (dashed); here it is drawn above the falling-stage deposits. The transgressive surface (TS) caps the lowstand wedge; the maximum flooding surface (MFS) caps the thin transgressive tract and passes basinward into a condensed section; the highstand foresets downlap onto it.

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