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Canyons and Crevices

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eggshaped
167142.  Wed Apr 18, 2007 3:41 am Reply with quote

Where would you find the largest crevice known to man?

Forfeit: Grand Canyon, Yarlung Tsangpo Canyon, hells canyon, kings canyon

Answer: On Mars.

This is Valles Marineris, the largest known canyon, 4,500 km long, 200 km wide and up to 5.7 km deep.

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In which state would you find the Grand Canyon?

There are Grand Canyons in 43 states of the US. In fact there are over 400 in the world. The canyon we know as the grand canyon was originally known as the “big canyon”, and is in Arizona, not Colorado which is what the US postal service thought when it printed 100 million stamps saying “Grand Canyon, Colorado”, they were all destroyed. Of course it is the Colorado River which flows through the canyon. In 1994 the Bill Pickett cowboy stamp illustrated what turned out to be his brother.

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What is the deepest canyon in the US?

Certainly not the Grand Canyon, it’s either kings canyon (CA) or hells canyon (Idaho-Oregon), both claim to be the deepest – but it’s probably kings.

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eggshaped
167226.  Wed Apr 18, 2007 6:44 am Reply with quote

Possible contender for the biggest crevice is the impact crater on the other side of the moon. It's bigger in area, a circle-ish hole with diameter of 2,500 km, and much deeper, over 12km in places.

link

It's called the South Pole-Aitken Basin, so link to end of the earth.

 
Gray
167285.  Wed Apr 18, 2007 8:22 am Reply with quote

I would imagine that there are some pretty deep 'crevices' on Miranda too, judging by the 30km high cliffs formed when the moon broke up and reformed rather poorly.

http://en.wikipedia.org/wiki/Miranda_(moon)

 
Jenny
167382.  Wed Apr 18, 2007 11:30 am Reply with quote

Re Kings Canyon and Hell Canyon - the consensus seems to be that overall Hell is the deepest at 7900 feet, but that Kings dips briefly down to 8000 feet for a short stretch.

Hell deepest at 7,900

http://www.answers.com/topic/hells-canyon

Hell second at 7,900

http://www.idahoptv.org/productions/idahoportrait/tour/hellstour.html

King second at 7,000

http://www.afn.org/~savanna/sequoia.htm

King deepest at 8,000

http://www.shannontech.com/ParkVision/KingsCanyon/KingsCanyon.html

 
eggshaped
181977.  Tue Jun 12, 2007 6:08 am Reply with quote

Speaking of craters, Crater Lake in the Phillipines is the "Largest lake on an island in a lake on an island" while Vulcan point in Crater Lake is the "Largest island in a lake on an island in a lake on an island" in the world.

 

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