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Earth and Space Sciences · 术语表

什么是 Trend and plunge?

又称: trend (of a line) · plunge

Definition 6.2 University Earth and Space Sciences — Year 1 · 第 6 章 — Field and Lab Methods I

The trend of a line is the azimuth of its horizontal projection, measured toward the end of the line that points downward. Its plunge is the angle between the line and the horizontal, measured in the vertical plane that contains it. A line plunging 20∘20{}^{\circ} toward 015∘015{}^{\circ} is written 20→01520\to015.

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