Want this question answered?
placer deposits
Heavy eroded particles settle out of moving water
It is primarily bcause runoff from the rain washes sediment into the river.
Fast moving. sediment is heavy it settle out in slow water. But a river that just became slow after being fast looks like it has the most, because of all the settling going on.
Sedimentary rock is formed by silt and mud accumulating and being compressed into stone mostly by time and it's own weight. A few years of heavy rains would likely leave dirtier and darker deposits. Any violent change in the area ( earthquakes, volcanoes, etc. ) might completely change the nature and colour of the deposits on a short term or permanent basis. Biologics ( anything from bacteria to dinosaurs ) might have a period of unrestrained growth, affecting the type and shades of the layers.
Heavy sediment can form sandbars wherever the current is less than the main flow. River floods can remove the sandbar due to the stronger flow.
waterways are the cheapest means of transport. they are most suitable for carrying heavy and bulky goods.
placer deposits
placer deposits
placer deposits
Mudflows then occur after
sediment
estuary
Heavy eroded particles settle out of moving water
placer deposits
It is primarily bcause runoff from the rain washes sediment into the river.
It is sediment transported by a river that becomes too heavy to be in suspension and thus sinks