If you like HUGE caves, like I do, this one looks perfect!
Wow! I may need to take a trip to Vietnam sometime.
(Why can't we have more caves like this in Texas?! I thought the ones we
visited in NM were huge, but, not like this one).
Mark
From: Scott Boyd
Agreed, it is breathtaking. Thanks for the link, Scott.
Cheers,
Karen
On Wed, Dec 22, 2010 at 11:05 AM, mark.al...@l-3com.com wrote:
If you like HUGE caves, like I do, this one looks perfect!
Wow! I may need to take a trip to Vietnam sometime.
(Why can’t we have more caves like this
texascavers Digest 22 Dec 2010 20:49:13 - Issue 1214
Topics (messages 16747 through 16763):
TPWD Commission Approves Devils River Land Acquisition
16747 by: Logan McNatt
Re: 9:00 CDT tonight: World's Biggest Cave on National Geographic channel
16748 by: John P Brooks
Lost
Very nice,
Thanks,
Geary
From: Marvin Lisa [mailto:mlmil...@gvtc.com]
Sent: Tuesday, December 21, 2010 6:21 PM
To: texascavers@texascavers.com
Subject: [Texascavers] New pictures of the Martian pits
Some people are a lot more qualified to answer Ediger's questions than
I am, but seeing as none of them has jumped in
CO2 of volcanic origin in pretty rare in caves. Main sources are decay
of organic matter and oxidation of material in the bedrock, the former
more often than the
Stay out of old uranium mines. The radon risk was first observed in uranium
miners who smoked. The management agency for Horsethief Cave, Wyoming, used
to keep track of the radon exposure of cavers to whom they'd given permits;
there was a reasonable amount of uranium in some of the fill
I don't know where you get your statistics on lung cancer, but they're off
base and misleading. According to the World Health Organization
(http://www.who.int/tobacco/research/cancer/en/):
Lung cancer - the big one
As noted at the outset, the paper describing the association between
Or coexistence of radon and CO2 in caves of Ellenburger limestone could
indicate that the limestone is poorly permeable and simply doesn't allow for
good ventilation of gases produced below the surface. Radon is a product of
U-234 to thorium to radium to finally radon, with alpha particle
Gill,
I'd bet that San Saba caves could could have slightly higher radon than
background, especially if they are connected to groundwater enriched in radon
and have little air turnover. Radon gas is denser than air.
You'd need long term exposure for it to be a health risk. Living in a
OK. But I'm interested in seeing a cross-section of the
sequence--including ground water conditions) above the granite (also
known to have radiation levels above EPA MCLs). That granite is pretty
hot, as I understand it, and decomposition of it could be producing a
lot of CO2 radon. I don't think
Have you checked w. BEG?Dec 22, 2010 01:48:11 PM, gi...@att.net wrote:OK. But I'm interested in seeing a cross-section of thesequence--including ground water conditions) above the granite (alsoknown to have radiation levels above EPA MCLs). That granite is prettyhot, as I understand it, and
How comforting to us Houstonians! But we are in the midst of transitioning
from groundwater to surface water for the region, I assume more due to concern
over subsidence than uranium or radon content. One natural component of our
groundwater that will be missed if it isn't replaced
I'm interested in seeing a cross-section of the
sequence--including ground water conditions) above the granite (also
known to have radiation levels above EPA MCLs).
Gill's prompts me to ask: anybody know where in hell the uranium and radon in
Houston's water comes from? We aren't exactly
I live in San Saba Co and you might be interested in the Annual Drinking
Water Quality Reports for the Richland SUD (Special Utility District) which
is required public info. The Radium levels are high but my understanding
(which could be wrong) is that there is no state or federal guidelines for
Decomposition of granite would not produce any significant
amount of CO2 on its own. Granite is mostly silica and alumina and
contains very little carbonate. Maybe the heat from radioactivity in
granite could bake CO2 out of overlying limestone, though.
Mark Minton
At 02:48 PM
Well at least all we have here is hexavalent chromium in our groundwater
http://www.cbsnews.com/stories/2009/06/10/earlyshow/main5076625.shtml
:(
Bill
- Original Message -
From: Mark Minton mmin...@caver.net
To: texascavers@texascavers.com
Sent: Wednesday, December 22, 2010 5:00
As far as minerals go, uranium is relatively soluble and is not uncommon in
trace (non-hazardous) amounts in some groundwaters, and accumulates to
hazardous or potentially hazardous levels under certain conditions.
The link between radon and CO2 in caves is currently tenuous at best; they
both
A new species of bat from New
Guinea:
http://news.nationalgeographic.com/news/2010/10/photogalleries/101006-papua-new-guinea-species-tube-nosed-bat-science-animal-pictures/.
Mark Minton
Please reply to mmin...@caver.net
Permanent email address is mmin...@illinoisalumni.org
Yesterday, a tourist fell inside the pit entrance of Sótano de Ahuihuitzcapa
(180mt deep pit). As I know at this moment, he was not a caver. He was just
watching the pit entrance when the accident happens. This cave is in Zongolica
area in the state of Veracruz. Espeleo Rescate México team
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