Growing Ranges?

Post general questions and discuss issues related to climbing.
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surgent

 
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Re: Growing Ranges?

by surgent » Thu Aug 25, 2011 7:05 pm

I wonder if any of the ranges or peaks in Virginia grew a little after their earthquake...

You pose a good question. You'd need some sort of subduction-type fault nearby. Perhaps some of the peaks in the Cascadia region are inching upward due to the big fault off the coast of WA/BC/AK.

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MoapaPk

 
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Re: Growing Ranges?

by MoapaPk » Thu Aug 25, 2011 7:09 pm

Boarh grew by 1.5' after the 1983 earthquake.

I suppose one has to ponder the meaning of "grow." The change to earth-centered geoids has boosted the reported elevations of some mountains; some of that is "real," as plates in the lithosphere move relative to the rest of the earth.

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MoapaPk

 
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Re: Growing Ranges?

by MoapaPk » Thu Aug 25, 2011 7:53 pm

An interesting dilemma, since a growth rate of 1mm/y has to be reconciled with a 1cm/yr growth from simply sliding to a new position relative to the older geoid.

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Buz Groshong

 
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Re: Growing Ranges?

by Buz Groshong » Thu Aug 25, 2011 8:29 pm

surgent wrote:I wonder if any of the ranges or peaks in Virginia grew a little after their earthquake...

You pose a good question. You'd need some sort of subduction-type fault nearby. Perhaps some of the peaks in the Cascadia region are inching upward due to the big fault off the coast of WA/BC/AK.


My guess would be that they subsided a tiny bit and that the coastal plain east of the Spottsylvania Lineament might have inched up a bit. It was definitely weird as hell experiencing that - we're not in Cali-friggin-fornia.

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Marmaduke

 
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Re: Growing Ranges?

by Marmaduke » Fri Aug 26, 2011 6:42 am

Whitney was always listed at 14,997 feet and it has been listed at 14,505 (for some time now), Is this possibly the same thing or was Whitney's elevation adjusted because of better accuracy with new technology? Were Muir, Mallory and Russell found to have "new" elevations as well?

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MoapaPk

 
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Re: Growing Ranges?

by MoapaPk » Fri Aug 26, 2011 2:55 pm

Marmaduke wrote:Whitney was always listed at 14,997 feet and it has been listed at 14,505 (for some time now), Is this possibly the same thing or was Whitney's elevation adjusted because of better accuracy with new technology? Were Muir, Mallory and Russell found to have "new" elevations as well?


The change in reported elevation was caused by the change to an earth-centered geoid for reference of the elevation. Whether it is "real" depends on your mindset. See discussion above.

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H2SO4

 
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Re: Growing Ranges?

by H2SO4 » Sat Oct 06, 2012 12:37 am

What's an "earth centered geoid"? Presumably any reasonable way you choose to extrapolate the sea level isn't going to affect the answer very much...especially for something so close to the ocean. So while it might be a big part of the growth over the last 100 years, it's not going to be a big part of the growth over the next 10^6.

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lcarreau

 
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Re: Growing Ranges?

by lcarreau » Sat Oct 06, 2012 1:07 am

Sorry, I don't have any big-ass scientific theories in order to explain the growth rate of peaks .... :shock:

I'm still waiting for California to fall into the sea, for crying out loud !

That hippie chick (real estate agent) was WRONG, when she told me she had proof that Arizona would soon have "Ocean-front" property .... :roll:
"Turkey Vultures always vomit when they get nervous."

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desainme

 
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Re: Growing Ranges?

by desainme » Sat Oct 06, 2012 4:38 pm

mt borah earthquake would have popped this portion of the lost rivers up 7-8 ft


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