An experimental approach to submarine canyon evolution

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How do submarine canyons form?
Submarine canyons are major underwater routes for transporting rapidly-moving water that is heavy with sediment from the continental shelf to the deep ocean. Few experiments, however, have explored how submarine canyons take shape and grow over time. Here, a group of researchers uses a sandbox experiment to simulate how a fast, sediment-laden current carves these canyons out of the continental slope. They recorded the entire experiment with time-lapse video and published their findings in a new paper in Geophysical Research Letters, a journal of the American Geophysical Union.
More information about the story can be found here:
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Video produced by Lauren Lipuma and Derek Sollosi at AGU.
Music by:
Ethereal Space by snowflake (c) 2011 Licensed under a Creative Commons Attribution (3.0) license. dig.ccmixter.or... Ft: Zep Hurme
Video and images provided by:
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Опубликовано:

14 окт 2024

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Комментарии : 12

@PlayNowWorkLater 5 месяцев назад

Another video that shows details of the construction of this tank would be nice. I’ve read the paper linked in the description, but it’s hard to make sense of the actual mechanisms employed to carry out the experiment. I really love this video by the way. Quite interesting to see turbidity like currents moving sediment down canyons. And how those canyons are carved out

@dawdistati1979 8 лет назад

nice thank you for your explanation It helped me understand it in my geology class.

@rahmalmarzah408 2 года назад

Simply Fantastic !

@noobsaibot5285 5 лет назад

Great visualisation. It reminds of the grand canyon, complete with a flat plateau even. Although the Colorado river carved it over billions of years, not 90mins... right?

@EthelredHardrede-nz8yv 5 лет назад

" Colorado river carved it over billions of years, not 90mins... right? No, by several orders of magnitude. Millions. This video does not come close to looking like the Grand Canyon. The GC has entrenched meanders, this did not.

@noobsaibot5285 5 лет назад

@@EthelredHardrede-nz8yv Look closer. It is very short. Do you really think that? You see it happening quickly right before your eyes and conclude it is possible to happen over millions of years? It is erosion. Minimum speeds and maximum time limits apply

@EthelredHardrede-nz8yv 5 лет назад

@@noobsaibot5285 " You see it happening quickly right before your eyes and conclude it is possible to happen over millions of years? Yes. It takes a long time to cut through a mile of rock. " You see it happening quickly right before your eyes " Its not rock. Of course it goes faster. It has no entrenched meanders either. Meanders only form in slow moving rivers. This is just a sand box and its underwater from the beginning. "Minimum speeds and maximum time limits apply"" Neither alleged limit exists. Just how old the Canyon is uncertain but its definitely millions of years old. Its not billions and not hundreds of millions for the canyon itself. The rocks, yes, the bottom is metamorphic granite. That layer of rock is really old, over a billion. So you you started out claiming its billions of years old and now you are claiming its not even millions. Perhaps you should learn some geology. Ethelred Hardrede

@killianoshaughnessy1174 6 лет назад

That's crazy!

@boobayloo 4 года назад

but look on google earth, the canyons are very close to the edge of the continental shelf, where is the current coming from? Seems like a flood ran over the entire continents all over the globe.

@amacuro 3 года назад

During glaciation times, the sea level dropped close to the edge of continental shelves, allowing rivers to flow close to those areas. Also, currents are not the only way to create canyons. Canyons can start by earthquakes or other triggers and they start as mudslides that expose steeper surfaces, that in turn are more prone to sliding, which in turn expose more steep walls, effectively carving themselves backwards from the edge of the platform towards more shallow areas.

@fisheyelens876 2 года назад

I feel the same way, the monterey canyon has the same features as any other river system that was formed on any contenant above sea level, this animation explains nothing, there has to be a main flow of water in the main channel to push the flow of "sand" from "feeder" channels down the main channel and it would have to be a significant flow to carve the main channel deeper and deeper into the substrate.