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Earth and Space Sciences · 术语表

什么是 Submarine fan?

Definition 17.8 University Earth and Space Sciences — Year 3 · 第 17 章 — Facies Models

A submarine fan is a cone of sediment at the foot of a continental slope, fed by a canyon: an upper fan with a main channel between levées, a middle fan of distributary channels ending in sand lobes, and a lower fan of thin turbidites passing into basin-floor mud.

(a) The Bouma sequence of a complete turbidite bed, drawn as a grain-size log (width means coarser), with its five divisions. (b) A submarine fan in plan: a canyon feeds a channel between levées, which splits into distributary channels ending in sand lobes; thin turbidites spread over the lower fan.
(a) The Bouma sequence of a complete turbidite bed, drawn as a grain-size log (width means coarser), with its five divisions. (b) A submarine fan in plan: a canyon feeds a channel between levées, which splits into distributary channels ending in sand lobes; thin turbidites spread over the lower fan.
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