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Brock
Trad climber
RENO, NV
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Don't think I will be climbing it any time soon, but anybody climbed Mr Natural (one of the best 5.10c finger cracks!!!) since the '99 rockfall? Where in relationship to the climb was the most recent rockfall?
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Brendan
Trad climber
Yosemite, CA
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If you are new to the geology of the valley, rockfall is definetly a part of the geomorphology. There are maps of the areas most prone to rockfall, and it is good to be educated before you commit to a long route.
Here is a very general list of places that Greg (the geologist) and I have talked about being serious rockfall zones in descending order from most often/likley to least...
1) Glacier Point Apron / Glacier point area.
2) The brothers formation
3) Cathedrals
4) Halfdome
5) Sentinel
6) Royal Arches area
7) Yosemite point buttress
8) El Cap
Feel free to amend this list based on personal experience.
Non-precip related rock falls are most common at night. The rock heats up during the day and expands, and then at night it cools and contracts, sometimes shearing loose rocks from places they were lodged. A.k.a., a bad idea to sleep right at the bottom of halfdome.
Since the valley receives very little precipitation during the summmer months, it is of upmost importance to respect the rockfall potential when it finally does rain. Be aware of your surroundings!
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GhoulweJ
Trad climber
Sacramento, CA
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That list cracks me up.
Those are my favorite YV climbing areas (except Glacier, ooooooo tooooo scary for me for the last decade).
Guess we better build a plastic wall in El Cap Meadow.
Be safe.
Jay
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Dr. Rock
Ice climber
http://tinyurl.com/4oa5br
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I say we loosen everything up with a giant crowbar.
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Clint Cummins
Trad climber
SF Bay area, CA
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Brock,
> Don't think I will be climbing it any time soon, but anybody climbed Mr Natural (one of the best 5.10c finger cracks!!!) since the '99 rockfall? Where in relationship to the climb was the most recent rockfall?
I answered these questions in a couple of posts in this thread.
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RIP Canon
Sport climber
Westfield, Ma.
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Early (Thursday) morning lighting, so detail is limited, but a rough idea of what fell.
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Melissa
Gym climber
berkeley, ca
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There used to be a net covering the section of 140 that slid a couple of years ago. Mother Nature had herself a good laugh at our pitiful net.
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lilolehs
climber
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Does anyone know if Curry Village is open? Is it safe? Are there showers?
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simply theresa
climber
Yosemite
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lilolehs: Curry Village is open (although some areas are still closed off). The pool shower house is open. The Mountain Shop and Curry Store are open, as is the bike stand and Mountaineering School.
Safe? Depends on how you define safe, I guess. I am planning to spend the night there.
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Rockjunky
Trad climber
modesto ca AKA methdesto
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lilolehs
only if you want to take the chance of streaking when the firecrackers go off!
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Mr_T
Trad climber
Somewhere, CA
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So are Time Machine and Crystal Cyclone gone?
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Karl Baba
Trad climber
Yosemite, Ca
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Oct 10, 2008 - 02:11am PT
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Was climbing on North Dome today. The ledge trail is a desvasted zone from all the stuff that avalanched down it from the wall. Wouldn't plan on doing that anytime soon.
Peace
Karl
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2tallclimber
Trad climber
The OC
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Oct 10, 2008 - 02:19am PT
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It seems those wire mesh nets managed to nab a couple of climbers too.
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Gunks
Trad climber
NY
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Oct 10, 2008 - 10:28am PT
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Where is the rock slide in relation to Harry Daley and Grack? We did those two climbs last week!
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Clint Cummins
Trad climber
SF Bay area, CA
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Oct 10, 2008 - 04:13pm PT
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> Where is the rock slide in relation to Harry Daley and Grack? We did those two climbs last week!
Way to the right of those. See my photo upthread.
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healyje
Trad climber
Portland, Oregon
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Oct 10, 2008 - 07:36pm PT
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Sh#t happens. Just another rainy night in PDX this week. Sucky way to wake up at 5:40am...
[url="http://www.oregonlive.com/news/index.ssf/2008/10/southwest_portland_home_swept.html" target="new"][/url]
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Minerals
Social climber
The Deli
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Oct 11, 2008 - 09:46pm PT
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More spray from Minerals:
How many bodies is it going to take for the Park Service to pull their head out of their ass? Seriously. Not that I think that piles of bodies are a bad thing, but come on… it’s nothing less than asinine to house people in such an area if you value human life. Curry Village should be relocated entirely – plain and simple. Duh.
Why does the rock keep falling? Because it’s crap – the tonalite of Glacier Point, the oldest (~93 million years old (Ma); not 6,000…) unit in the Tuolumne Intrusive Suite (TIS). It is equivalent to the tonalite of Glen Aulin and the Kuna Crest granodiorite. The smooth portion of GP Apron consists of Half Dome granodiorite (the second oldest unit in the TIS, ~89 - 92 Ma). The difference between the two rock types can be seen in the photos that have been posted in this thread; the tonalite of GP has a much more blocky appearance while the HD granodiorite appears smooth.
Take a look at the following geologic maps to see where these rock types exist. The first map is an older bedrock map of the Valley. For some reason, Calkins did not differentiate between Sentinel granodiorite and the tonalite of GP. He combined both of these units into one unit, which is colored dark pink on the map, and labeled Sentinel granodiorite. The more recent Yosemite geologic quad is more accurate; Peck was able to separate these two different units, as seen on the map.
Yosemite Valley Bedrock Map:
http://geomaps.geosci.unc.edu/parks/fulls/Yosemite%20-%20bedrock.jpg
Yosemite Geologic Quad:
http://geomaps.geosci.unc.edu/quads/fulls/Yosemite.jpg
So, now that you know where the different rock types are, or rather where the bad ones are, wouldn’t it be better to just climb rounded domes? Yeah, that Catherdral Peak granodiorite (~86 - 88 Ma) not only looks like gold, it IS gold!
Got biotite?
It is only a matter of time until mangled and crushed bodies pile up at Curry.
Bringmesomeseriousmotherf*#kingdeath!!!
Yeah, Darwin says… “Stay at Curry, enjoy the fury!”
Welcome to Planet Dumbf*#k.
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corniss chopper
Mountain climber
san jose, ca
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Oct 11, 2008 - 10:41pm PT
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Curry Company must show leadership! Adults only should be
allowed to rent cabins at Curry. No children allowed at all.
Adults can judge the risk and make their own decisions while children are captives to their parents or guardians control.
School groups should not go into Curry where there is a danger of avalanche.
Is it time to require helmets be worn at all times by everyone in
the "Camp Curry Rockfall Zone" ?
Small Business Safety Management Series
U.S. Department of Labor
Occupational Safety and Health Administration
OSHA 3151
1997
Head Protection
When do my employees need head protection?
You must provide head protection for your employees if:
* Objects might fall from above and strike them on the head;
* They might bump their heads against fixed objects, such as exposed pipes or beams; or
* They work near exposed electrical conductors...
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