Why Don’t All Rivers Make Canyons?

Wow, never realised..

Is that slope a brachistochrone????

Or there is a huge stream of water, which excavates the earth into a canyon within minutes or hours or days..... million years not needed.. meh... unscientific video

3 min video with 2 mins of ads, f off

Oh my god the first 2 minutes just cleared so many misconceptions i had about canyons lmao

Wow i cant figure this out by myself.
I thought steeper elevation

i love how innocent child music is always played when someone is trying to indoctrinate you.

The truth is we don't know and people can only speculate. Scientists are wrong 80% of the time too, so... yea. My vote is on a catastrophic flood.

Cool I did not know that.

Never thought of that !

There is an abundance of evidence that the Grand Canyon is the result of an ice dam breaking from the last ice age. There is rock that simply can’t be cut away by a normal flowing river and rocks from upstream that could not be moved even by the exceptionally rare flood. It takes an insane deluge to pick up these boulders and transport them so far from their points of origin.

I will love to watch the video about . What if we align plants according to their temperature

👇

You explain what makes the Grand Canyon deep, but what makes it so wide?

I am a Geologist. I endorse this video. 👍

The Nile river did make a canyon but as the sea level rose in the Mediterranean sea it was filled in with sediment

Hmmmmm. World upside down. I guess textbooks need to be re-written to reflect this.

Because some rivers were created by Great Lakes left behind after the global flood and the soft recently deposited sediment was washed away in weeks by a massive torrent such as the grand canyon which the colorado has adjoining rivers and streams that flow counter current prior to joining the river which is only seen when a dam breaks.
Look at the grand canyon, no evidence of erosion between the layers, no rainfall, no animal burrows, trees standing through "millions of years" of layers

Global flood, team 6,000 years ago. Christ Jesus is coming back and he is coming soon. Please ask for his saving grace and forgiveness of your evil and sin. He saved me and I was a wicked man. God loves you, specifically you and if you read through this, he led you here.

Casually debunking my understanding of erosion in a neat 3 minute video.

I am stupid.

So water is more permanent and dependable than stone. Poetic.

He pointed out that the third ingredient is
SPOILER ALERT














"Tectonic activity moving the land upwards."

3km and 5km deep gorges, what? 😳😳😳😳😳

The Nile and Colorado are nowhere near that old

... and then Christian fundamentalist brains explode

This explanation makes no sense because the rock would be way heavier than the water.

My take is that there was a catastrophic flood event with quakes that carved it out.
Just looking at any burst dam or when mt st hellens erupted and carved out the side with mudflow to see that water carved out rock makes much more sense and was actually observable in real time....

This is the third mechanism that I have heard proposed.
1 - gradual erosion, 2- massive erosion in discreet events (megafloods), 3 - This
The more I learn, the less I know. 😢

rivers don't make conyons...big floods do

it sounds like you are assuming all land started out completely plain with no elevation. how would you know the initial conditions of any given valley and river?

My guess before watching the video is that it has to do with the resistance. If the water can flow smoothly over something then it has no reason to carve.

the rivers up where I live kinda did this because of glacial rebound! there's like 20-30 foot deep valleys on all the rivers

My initial guess was that the river had to be cutting through rock that was significantly higher than sea level. And as Obi wan once said "it is true, from a certain point of view"

Nursery music

What is the name of this theory?

And here I was wrongly thinking it was either due to water speed, a lack of sediment deposition, or the softness of the rocks.

I wonder how Valles Marineris formed

My whole life was a lie.

i saw something else that showed that they believe the entire lower colorado state was once a giant lake. once the lake became so high that it started overflowing, the flow quickly washed the loose top layer and the remaining giant lake made short work of the harder ground underneath.

Now I'm embarrassed I didn't intuitively know that. The way I thought it worked is impossible now I think about it.

It's funny. I am well aware that water can move the earth, but I sometimes forget that the earth also moves on it's own.

Land: (grows)
River: that’s not my problem, that’s yours

So it's like lifting cheese up towards a knife, if the cheese doesn't move there is no cut

But how? 5M years is so much more than 6K years. There must be an answer in the book somewhere.

Too simple. Average flow rate is meaningless; take box canyons along the Colorado River as an example: their average flow is extremely low, but due to frequent flash-flooding (a weather phenomenon) these canyons are cut very deeply. As an extreme, the Channeled Scablands have been cut deeply despite having a zero average flow rate.
Niagara Falls has been around a long time, so why isn't it a smooth ramp, as in your diagrams? I believe the underlying rock is softer than the capstone, so rock type needs to be a consideration in your model.
Soft ground also allows meanders, which discourage canyon formation. I am currently unsure how oxbows and swamps fit into any explanation -- is silt a cause or effect of canyons?

Land grew and river said "nope".
I genuinely thought that it was the bedrock or some kind of climate pattern of flooding and drought. This is really cool.

This makes me thing erosion is something they need to include in open world building/exploring games like No Man's Sky, Minecraft, Terraria, etc.

So, what's the deal with the Niagara Falls, then? I thought it was carved out because the bedrock is limestone, and thus, water soluble. There's very little seismic activity in the area. Although, glaciation and retreating glaciers carved up a lot of the Great Lakes region, I don't think it had to do with Niagara Falls' formation.

Turkish subtitle please

Just a quick question on the numerical values: assuming a rise of 0.1mm/year it takes 10.000 years for the land to rise a meter, so in the 5 Mio. years mentioned that's 500m. Even with the earlier time frame of 7Mio. years only half the 1.5km land rise mentioned. I would expect the land rise to be uneven over geological time. Also, Ice Age effects concerning bulging of the crust and such.

Not sure what my question is, but the values don't seem to line up easily.

There is an error in some of the drawings in this video: There are several drawings of water flowing downhill from a high elevation. However, the Colorado river actually flows towards the higher elevation, which is (iirc) over 10,000 ft higher than at its lowest elevation. If the Colorado river actually cut out the canyon, when it met the region of higher elevation, it would have had to have gone uphill, over thousands of feet, and then down the other side to make that cut. The river is flowing in the wrong direction for it to have carved out the canyon gradually over time.