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Which minerals are commonly carried to continental shelves by rivers?

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continental shelf The broad, gentle pitch of the continental shelf gives way to the relatively steep continental slope. The more gradual transition to the abyssal plain is a sediment-filled region called the continental rise. The continental shelf, slope, and rise are collectively called the continental margin.

Rivers are a primary source of sediment for continental shelves, transporting both dissolved constituents and solid particles derived from the weathering of continental rocks.12

The solid material, often referred to as clastic input, is composed chiefly of quartz and clay minerals. In addition to these, rivers carry a variety of other minerals and elements in their suspended load, including:1

Iron oxides (such as FeOOH)2
Titanium2
Rubidium, scandium, and vanadium2
Lanthanoids (rare earth elements)2

The specific composition of the sediment reaching a shelf depends on the tectonic setting, the size of the river, and the local wave energy. While some shelves are dominated by quartz sands, others—particularly those where large rivers deliver significant sediment—accumulate muddy deposits. Furthermore, the dissolved load of rivers, which eventually reaches the oceans, includes ions derived from the weathering of minerals like calcite, halite, gypsum, anhydrite, and various silicate minerals.12