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Ancient Canyon Found Under River in Tibet

 
Anonymous Coward
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11/24/2014 11:57 PM
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Ancient Canyon Found Under River in Tibet
An ancient canyon buried along the Yarlung Tsangpo River in south Tibet could change current thinking about how picturesque gorges of the Himalayas became so steep, so fast.

The canyon is thousands of feet deep in places.




The researchers’ reconstruction of the former valley floor showed that the slope of the river once increased gradually from the Gangetic Plain to the Tibetan Plateau, with no sudden changes, or knickpoints. Today, the river, like most others in the area, has a steep knickpoint where it meets the Himalayas, at a place known as the Namche Barwa massif.

There, the uplift of the mountains is extremely rapid (on the order of 1 centimeter per year, whereas in other areas 5 millimeters per year is more typical) and the river drops by 2 kilometers (1.24 miles) in elevation as it flows through the famous Tsangpo Gorge, known by some as the Yarlung Tsangpo Grand Canyon because it is so deep and long.

Combining the depth and age of the paleocanyon with the geometry of the valley, the geologists surmised that the river existed in this location prior to about 3 million years ago, but at that time, it was not affected by the Himalayas.

However, as the Indian and Eurasian plates continued to collide and the mountain range pushed northward, it began impinging on the river. Suddenly, about 2.5 million years ago, a rapidly uplifting section of the mountain range got in the river’s way, damming it, and the canyon subsequently filled with sediment.





[link to www.futurity.org]
Anonymous Coward (OP)
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11/25/2014 12:01 AM
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Re: Ancient Canyon Found Under River in Tibet
the current events will probably distract from this cool story
Lionels Love

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11/25/2014 12:40 AM

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Re: Ancient Canyon Found Under River in Tibet
:girlie bump:
___

_Kindnesstard___________________

"The love of knowledge is a kind of madness" C.S.Lewis

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Anonymous Coward
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11/25/2014 12:46 AM
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Re: Ancient Canyon Found Under River in Tibet
Awesome! 5*s.
Anonymous Coward
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France
11/25/2014 01:03 AM
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Re: Ancient Canyon Found Under River in Tibet
This is NOT a static planet, people just have a hard time wrapping their heads around the scale of geologic time and the massive change that can occur in it. I've taken shade under precariously balanced boulders in the desert which could have fallen at any moment- in the next 100,000 years. tounge

Even a basic understanding of geology will make a person feel like their lives are just an instant in time.
TheOracle'sCookie

User ID: 65467576
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11/25/2014 01:14 AM
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Re: Ancient Canyon Found Under River in Tibet
Here is a truly remarkable film--if you haven't
taken the time to watch it & you're up late
watching the RIOTS...you might want to watch
this. It really does show how there are things
in our solar system which DO happen very suddenly
and can change entire landscapes in a blink
of the eye.


[link to www.youtube.com]
FairUSE (Education/discussion)

The "rogue scientist" who this film is covering is
Immanuel Velikovsky--probably one of the greatest
minds in the 20th Century.
cheer
O'sCookie
Anonymous Coward
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Australia
11/25/2014 01:31 AM
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Re: Ancient Canyon Found Under River in Tibet
After each Biblical reset the Earth is left void and without form.
Anonymous Coward
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11/25/2014 06:08 PM
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Re: Ancient Canyon Found Under River in Tibet
Up
Anonymous Coward
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11/26/2014 10:54 AM
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Re: Ancient Canyon Found Under River in Tibet
shit happens fast





GLP