Sink Holes

@staria (2780)
Philippines
February 14, 2011 9:11pm CST
I got scared when I heard about sinkholes from Guatemala and China and I think there's still one country who had it recently. What do you think caused these? Is it because we are not taking care of mother earth? They say though that these were caused about by rock movements beneath the earth's crust. What can you say about this?
2 people like this
12 responses
@ElicBxn (64169)
• United States
15 Feb 11
there are several reasons for sinkholes One is the collapse of a portion of a cave system - these are the main access points to Mammoth Cave in Kentucky. Another is the collapse of a cave system due to the reduction of the water table, the main cause of sink holes in Florida and probably in the Yucatan. The final way is water undercutting, where for some reason there is water that has peculated into an area where it didn't previously exist and eroded what amounts to a temporary cave. These can be formed by everything from tidal penetration - as along the coasts of the world, to leaking water pipes in cities. That's not to say that there aren't other ways sink holes are formed, just that these are the 3 main ways. In Texas, like the Yucatan, without any human intervention, the second way has created lots of interesting places. http://www.westcave.org/about/index.php http://www.texasoutside.com/hamiltonpool.htm
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@staria (2780)
• Philippines
15 Feb 11
Saw the links, these places were really interesting. Unlike those sinkholes in Guatemala, dude that's huge! And is even situated in the city.
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@ElicBxn (64169)
• United States
15 Feb 11
Well, obviously the same sort of geology in the Yucatan exists in Guatemala. They are thinking that a sewer or other waterline break started the breakdown that the hurricane exacerbated but it all is on top of a porous limestone bed that underlies the area and leads to the problems. Cenotes were sacred "sinkholes" of the ancient Mayan, I'm sure they had to collapse at some point too... http://en.wikipedia.org/wiki/Cenote
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@ElicBxn (64169)
• United States
21 Feb 11
Thanks for the Best Response. I think I missed my life calling when I failed to go into Geology instead of what I did go into.
• United States
15 Feb 11
It is just water dissolving the soil eroding it away underground.
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@ybong007 (6643)
• Philippines
15 Feb 11
Sink holes are caused when the an area where water use to flow dries up. Over time the soft soil will eventually collapse and show a deep hole. Although this is a naturally occurring phenomenon and certainly don't happen overnight, there's likelihood that man contributes to this. As water is becoming more and more scarce and the more we pump water from underground it is very likely that more sink holes will appear in the future as water tables start to dry up.
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@staria (2780)
• Philippines
15 Feb 11
Yeah, I just thought maybe it connects on how our nature is being treated nowadays. Thanks for the information.
• United States
16 Feb 11
If humans are not part of nature then it would be unnatural.
@rsa101 (40982)
• Philippines
15 Feb 11
I do not think it has something to do with us not taking good care of mother earth but it is a naturally occurring phenomenon. It just happen to be in an urban area but if that happens in the jungle no one would bother and get alarmed by it.
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@rsa101 (40982)
• Philippines
15 Feb 11
What is weird about that sink hole is that it looks like the hole was near perfect cylindrical hole which looked like it was drilled by something underneath. Most sink hold I see are not liked that. But then we can never predict anything that nature has in store for us and sometimes we come up but wonder when they happen.
@staria (2780)
• Philippines
15 Feb 11
yes the fact that it happened in an urban area really got me scared. and i think that they are not even aware while it is happening. how can that be, the hole is so deep
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@elmiko (6630)
• United States
16 Feb 11
i really don't think sink holes has to do with environmental damage caused by humans. i just think its the earths natural structure at work. yes, sink holes are caused by rock movements beneath the earth's crust. a person on tv said before a big sink hole started in her area that she had been hearing strange sounds for 30 years before it happened.
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@staria (2780)
• Philippines
17 Feb 11
Really, that's a very long time before it happened.
@Hatley (163772)
• Garden Grove, California
9 Mar 11
hi staria I was reading one article that told how some rocks have small holes in them and as water seeps in it erodes away minerals from the rocks and ghe rocks and soil soften and a sinkhole appears. I think we probably do contribute in some ways as we waste water and we contaminate the air we breathe and the waterways. The scientists do say most sinkholes are nature caused but mankind also contributes to them. so we need to all take better care of this woeld we were given.
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@staria (2780)
• Philippines
10 Mar 11
Of course, we play an important part in taking care of our mother Earth. I think that in everything that we do, the nature is affected. Though it might not be direct, somehow the results of our actions still affects it overall.
@beamer88 (4259)
• Philippines
15 Feb 11
I guess people are absolved of blame here. Sink holes are natural occurrences which basically involves the process of erosion. I think underground water is the culprit. We could however hasten sinkhole appearances by irresponsible building construction for example. If geological studies aren't conducted prior to construction, they may be building on top of a limestone-rich ground. This type of sedimentary rock is easily eroded by underground water. If say the drainage system of the building accidentally burst open, the water may add to the existing ground water and thus hastening the limestone erosion. Some people think that this caused the Guatemala sinkhole, although the sinkhole appeared in a non-limestone ground.
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@beamer88 (4259)
• Philippines
15 Feb 11
Actually, limestone-rich grounds are usually where sinkholes appear but they aren't exclusive. But if I recall correctly what I read about the Guatemala sinkhole, the upper portion of the ground was composed of loose pumice or volcanic sediments and that the volume of water from the city's sewerage system, which increased by the rains brought by a tropical storm, caused the erosion of the pumice-composed ground and thus making the sinkhole. But I think these are only theories by geologists and no one has yet ascertained the real cause.
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@staria (2780)
• Philippines
15 Feb 11
so what could have caused the Guatemala sink hole then if it is a non-limestone ground?
@Lore2009 (7378)
• United States
15 Feb 11
This is scary. The first thing I thought of was about how we treat the earth also. But then, there are areas that do not have these so I guess it may be something natural.
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@staria (2780)
• Philippines
16 Feb 11
Right, I think the 1st thing that anyone would feel would be fear.
• United States
15 Feb 11
I hate sink holes I don't understand why they don't do anything about it either!!!It really upsets me!!
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@yspmyl (3435)
• Malaysia
16 Feb 11
I think sink holes not only happen in China and Guatamala but it also happen everywhere in the world, only the 2 countries have a bigger sink hole where other having significant smaller sink holes. It happen when people do not care about the environment and keep pumping out underground water and when the water depleted, there are pore and empty spaces to be fill up, so, sink holes happened.
@staria (2780)
• Philippines
17 Feb 11
So it still boils down to the harmful effects of human work.
@globaldoc (858)
• Philippines
15 Feb 11
I think yes, there are the movement of the rocks. All i can really say is, God has already taken care of it way before we learned about it....Guess we just cannot do anything about it except to take care of mother earth.
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• United States
15 Feb 11
Our planet's surface is made up of many things, rock surrounded by sand, gravel, composting foliage...there is always a shifting going on, it rains and sand movees, gravel also, composting foliage collapses under weight, so it's actually more surprising that there aren't more sink holes than fewer. I realize the prospect of one opening in your town or mine or anyone's isn't an attractive one, but we have to accept that the earth is always in a state of flux, moving under the surface and at times that surface collapses or rises. As for taking care of mother earth, some things we simply can not affect, but we surely can clean up our messes.
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• Oman
15 Feb 11
I'm sure these are already the signs of the times as manifested in the Bible specifically in the Book of Revelation. Science just associate it with this reality of life.
@staria (2780)
• Philippines
16 Feb 11
Wow, that's really scary. If this is one of those, we should all be ready and change our bad ways.