Introduction to shallow-water environments and their sediments - Sediments of shallow-water environments

3 important questions on Introduction to shallow-water environments and their sediments - Sediments of shallow-water environments

Where does the sediments in the oceans come from (sources)?

They come from weathering and erosion of continental rocks. So they are terrigenous sediments.

What are the two types of weathering?

1. Physical (or mechanical) weathering: the fragmentation of rocks.
2. Chemical weathering: the decompoisition of rocks through chemical reactions.

What is the most common sediment on continental shelves?

The sediments of most continental shelves are predominantly terrigenous and consist of rock fragments, quartz sands and clay-rich muds. Where terrigenous sediments are scarce or absent, carbonate sediments of biogenic or inorganic origin may occur, especially in low latitudes.

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