How Was the Grand Canyon Formed?

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In the 19th century, many people believed that landscapes like the Grand Canyon were shaped by volcanoes and earthquakes. But one American geologist named John Newberry had different ideas.

From: AERIAL AMERICA: Natural Wonders

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I watched the video so you don't have to. Just skip to like 1:58 and watch until 2:10. Your welcome and hope you do well on whatever assignment you are working in aswell :) .

The video before is just telling you about a American geologist who discovered it and how he thinks it was created. The short answer is just the time stamps i gave you

kingisaacius

where can i see an animated version of its "creation" ?

strongindependentblackwoma

It looks like a massive river that dried up over millions of years, the erosion is visible on the rocks, it used to be filled with water all the way up.

RaKeLN.

I wonder what it was like, that very first day, where the water started to flow towards there. Before any visible erosion was happening.

BMarie

Who else had to watch this because of school?

creativeusername-kb

I've thought all along that the fissure was too deep to be carved by water. I believe it was tectonic forces that initially ripped the Canyon apart, thus allowing the water to go through. This is similar to what is happening now in Ethiopia, in Africa.

annharrison

At 1:55mins you see cross-bedding of the sedimentary rocks layers (not horizontal) indicating deposition of sediments under high flow conditions. Also, the narrator states canyon formation began ~6 millions years ago, based on the radiometric date calculated for the uppermost layer which happens to be limestone (~100ft of crushed up sea fossils which not surprisingly also has the lowest density). So you have the Colorado River carving through an ocean deposit ~8, 500ft above sea level, leaving no river delta. That is impossible friends.
There are 2 alternative explanations; (1) either the groundwater was released from below the earth's crust causing parts of the crust to subside and then water receded back into the crust and also formed the poles, or (2) the whole ocean floor jacked up catastrophically to create the continent, with the water receding quickly to carve the canyon.
I think John Newberry didn't even consider how the plateau got there and how that could help explain the canyon formation.

noobsaibot

I'm I the only one looking at this just for school and eating candy-

natashah

So if the Colorado River enters the Grand Canyon 4000 feet lower than the top of the Canyon then we know this is not true. Water does not flow uphill. A huge flood and massive overflows from Lake Hopi formed it. The lake beds are still there plus there is no river delta. Nice try.

michaelbauer

it wasn't erosion alone but continental drift and erosion that made it so deep.

MultiPjay

It was formed by me and my sis in childhood, we start digging the ground for lost keychain..

aashu

Some of you really need to study mt st helens and the canyons of the PNW before you believe that this took millions of years.

gian-lucbrasseur

impossible. a river with an average of 10 miles wide and about 20 feet deep there would have had to have been a flow 8 times greater than the mississippi river. that would require a water (or melting ice) source of 1, 200 cubic miles per year - all of which had to go in the same direction. and that is @4mph, hardly rock cutting speed

boedude

No way did that river create the grand canyon. It was formed by multiple massive rushes of water from millions of years of melting ice ages.

turnthebeataround