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cleo
Social climber
Berkeley, CA
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Oct 16, 2008 - 06:36pm PT
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"cleo, why you no have stations around GPA?"
yes, that would be a good place for a station, all things being equal. of course, my "wants" as a scientist must be balanced with keeping wilderness ethics intact, as well as the likelihood that a site over there in the winter would be inaccessible (ever watch snow and ice avalanche down those north-facing cliffs? it's quite impressive!)
and i should say upfront, i have no idea how to predict rockfalls... i'd need a lot more data before i could claim something like that, if ever. but that's why its called an experiment, right?
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corniss chopper
Mountain climber
san jose, ca
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Oct 16, 2008 - 07:04pm PT
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anyone hear if Curry is considering rockfall nets?
Think it would show they are also concerned for visitor safety
as well as $$$.
Safety is a relative concept. A car seatbelt will save you from
some collisions but not all. Just as "rockfall-nets" would save
the canvas tent dwellers at Curry from a certain percentage of
high velocity stones.
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WBraun
climber
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Oct 17, 2008 - 12:24am PT
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You are dreaming weschrist.
I've been here now for 38 years, and seen sh'it blow off the walls in places you'd never would have thought.
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Chicken Skinner
Trad climber
Yosemite
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Oct 17, 2008 - 12:34am PT
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You are right Werner! After 38 years we still don't have a clue where the next big one will be. We'll have to do what the natives did, migrate or hang by the river when it is warm.
Ken
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Karl Baba
Trad climber
Yosemite, Ca
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Oct 17, 2008 - 12:57am PT
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"anyone hear if Curry is considering rockfall nets? "
I'd be surprised if any net could do anything about those boulders in the photo which are 20+ feet high!
peace
karl
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corniss chopper
Mountain climber
san jose, ca
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Oct 17, 2008 - 02:22am PT
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If built, should the wall be made strong enough for the worst case event? Like a King Kong Boulder falling?
...an example of such a wall protecting the camp...
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WBraun
climber
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Oct 17, 2008 - 10:58am PT
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Wes
This is what happened .....
You've now said absolutely nothing. You've juggled a bunch of words around masqueraded as intelligence.
So many of the best Western minds have moved into the destructive realm of gross materialism.
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cleo
Social climber
Berkeley, CA
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Oct 19, 2008 - 05:07pm PT
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"It is a huge ditch that was scoured by ice... I'd have thought sh#t would blow off damn near EVERYWHERE."
It does blow off everywhere, wes. Just look at all the white scars on the cliffs. The only difference at Curry is that a lot of people are constantly around, and so the reporting rate is higher.
But don't take it from me... here's a starter article:
http://pubs.usgs.gov/of/1999/ofr-99-0578/
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neebee
Social climber
calif/texas
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Oct 19, 2008 - 05:21pm PT
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hey there corniss chopper... say, very clever art-work-idea-share...
say, but--as we all know, though,
with:
man vs. nature (or in THAT artistic case, nature's HUGE critter) nature or critter, wins out with a surprise pitch, you know, the ol':
curve ball, or fast ball:
as all fall back, and sit about bewildered or--run for the hills...
*(yep, i realize this is a creative endeaver, here... no harm meant)...
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andanother
climber
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Oct 19, 2008 - 05:26pm PT
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"It is a huge ditch that was scoured by ice"
Actually, Yosemite was created by a giant serpent. It's the same serpent that swallows the moon during an eclipse.
Speaking of the moon, did you know that it is 10 times farther away than our sun?
And the astronauts didn't go there. They went to the hidden planet Rahu.
WBraun, did I get all that right? I've been studying!
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cleo
Social climber
Berkeley, CA
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Oct 20, 2008 - 01:24pm PT
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Thanks for the photo links..
and wes - I'm going to do some digging around on SOC, sounds like it might be worth a look.
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RopeNRocks
Mountain climber
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Oct 29, 2008 - 12:11am PT
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Gstock, I've been looking at the great articles you've linked to. I read about the joints called j2 that angle down to the left (east?) in all the pictures. You can see em even from far away in the valley. USGS says the Dec 26, 2003 rockfall that hit like 14 cabins was caused by rainwater seeping into j2 and following it to the face and pushing the slab off with water pressure. So it looks in the pictures posted above like there's one of those j2's going straight to the top of this new failure from the gully off to the right (west?). And, I read it was raining for days before the slide, like 2003. Any chance rain water caught in the gully followed a j2 and did the same thing as in 2003? Something to think about? Keep up the good work!
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gstock
climber
Yosemite Valley
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The most recent rockfalls did originate from beneath one of those J2 joints, and that probably helped destabilize the slab that failed on October 7 and 8. Just to the east (climber’s left) of the most recent rockfalls is a large overhanging wall. That wall (the Nine O’Clock Wall) almost certainly results from prehistoric rockfall(s) from beneath that J2 joint, and the recent rockfalls are a continuation of that.
Interestingly, the rock surface exposed after the rockfalls was completely dry when viewed from a helicopter immediately thereafter. This indicates that water in general, and recent precipitation in particular, was not involved in triggering the recent rockfalls. The lack of water also rules out freeze-thaw processes, although the air temperatures were above freezing then anyway. Neither were there any seismic events at that time that were close enough or large enough to trigger the rockfalls.
So at this point we can rule out some triggering mechanisms, but cannot specifically identify one. This is not an uncommon situation; of the more than 600 rockfalls documented in Yosemite Valley since 1857, more than half had not had reported or recognized triggering mechanisms. This means that there is still a lot of work to do to fully understand what triggers rockfalls in Yosemite Valley.
Greg Stock
Park Geologist
(209) 379-1420
greg_stock@nps.gov
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Mighty Hiker
Social climber
Vancouver, B.C.
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"This means that there is still a lot of work to do to fully understand what triggers rockfalls in Yosemite Valley."
Gravity may have something to do with it. F=mA and all that. And rock reaching its elastic limit, in processes and from causes that are nearly imperceptible, but inexorable.
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honeygirl
Social climber
walnut creek,ca
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Yes we were there! I thought it was a plane crash. The sound was loud and unbearable. Scary!
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Dr.Sprock
Boulder climber
I'm James Brown, Bi-atch!
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Congadulations!
you get the
Dredger of the Year award.
lets see who can make it a four, i mean three year dredger?
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Ihateplastic
Trad climber
It ain't El Cap, Oregon
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I REALLY want to see the very first posts to ST! What were we pissin' and moaning and bragging about then?
Probably Republicans...
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Jaybro
Social climber
Wolf City, Wyoming
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the valley was formed by a plane crash. a plane carrying Marijuana. so all further rockfalls are the fault of any and all trafficers. so all litigants are entitled to sue any purveyors of canabis; ie, druglords, all dispensers of medical ganj etc. hope this helps.
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