The ocean floor near the base of rivers

In summary, the conversation discusses the presence of canyons at the base of large rivers on sea floors, which may have been carved by the rivers. There are two main theories for their formation: that the sea floors were once above sea level in the past, or that underwater landslides known as turbidity currents eroded them. It is possible that a combination of both theories played a role in their formation.
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When I look at a map which shows the sea floors I see canons at the base of large rivers which tend to fork out and travel long across the ocean floor. It looks very much like they were carved by the river. What are these and what caused them?
 
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  • #2
Yes You're right indeed. Would it be an idea that those ocean floors were above sealevel in the geologic past?
 
  • #3
The other main theory is that turbitidy currents (underwater landslides) are mainly responsible for their erosion, as some extend far deeper then sea level has ever been known to fall to during ice ages (3000m below the surface). In reality, a combination of the two may be responsible.

http://www.madsci.org/posts/archives/may2001/988903442.Es.r.html
 

1. What is the ocean floor near the base of rivers?

The ocean floor near the base of rivers is the area where a river meets the ocean and the river's sediment flows into the sea. This area is constantly changing due to the movement of the river and ocean currents.

2. Why is the ocean floor near the base of rivers important?

This area is important because it is where the majority of sediment from rivers is deposited into the ocean. This sediment provides nutrients for marine life and helps shape the physical features of the ocean floor.

3. How does the ocean floor near the base of rivers affect marine life?

The sediment from rivers can either have a positive or negative impact on marine life. It can provide nutrients for organisms to thrive, but it can also smother and damage delicate ecosystems if there is too much sediment.

4. How does human activity impact the ocean floor near the base of rivers?

Human activities such as dredging, damming, and urban development can greatly alter the flow of rivers and the sediment that reaches the ocean. This can have a significant impact on the ocean floor and the marine life that depends on it.

5. How do scientists study the ocean floor near the base of rivers?

Scientists use a variety of methods to study this area, including collecting sediment samples, using remote sensing technology, and conducting underwater surveys. They also analyze historical data and monitor changes over time to better understand this dynamic environment.

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