The sulfide content of bottom sediments is one of the most important environmental indexes.

底质中的硫化物含量是一项重要的环境指标。

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The decrease of fluvial sediment to the estuary has led to coarsening of bottom sediments in the modern delta and shrinking of modern depocenter.

现代沉积区沉积中心面积的减少，表明锋带沉积作用的减弱。

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In the normal water phase, the remaining Phosphorus makes its way, settles to the bottom of the ocean, and gets mixed into ocean sediments.

在正常的水相中，残留的磷会自己移动，沉淀到海洋底部，并混合到海洋沉积物中。

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Alex Wolfe and colleagues have sampled and chemically analysed the layers of sediments at the bottom of lakes in high alpine zones and the Arctic.

BBC: Leaving our mark: Fossils of the future

The fundamental role of bottom currents in the construction of continental margins has now been well documented and the sediments deposited or significantly affected by these bottom currents are known as contourites.

UNESCO: EARTH SCIENCES FOR SOCIETY