The sediment comes from eroded rocks carried ... causing them to change into another type of rock. They are usually resistant to weathering and erosion and are therefore very hard-wearing.

Rivers are dynamic ecosystems shaped by multiple interacting and overlapping physical and biological processes. A fundamental ...

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type ... of other rocks that become joined together. 1 Sediment transport ...