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What is a sinkhole?

(31 Posts)
BetteDavis01 Tue 18-Feb-14 22:25:13

Does anyone know what causes them? I keep hearing about them on the news and there seems to be a new one appearing everyday. TIA smile

Regbooboo Wed 19-Feb-14 21:04:52

Revenge of the badgers!

The badgers claimed responsibility for the holes which have swallowed houses, vehicles and at least 20 cows.

In a statement, the badgers said the holes were a ‘legitimate response’ to the government’s ‘acts of war’ and threatened to ‘hollow out Britain until it was like an Easter egg’.

The statement added: “You think we are beneath you. Well, we are beneath you. Literally. What about that, eh?

“Admit to your TB lies and pay us reparations or one day the ground you stand on will suddenly give way and you will be plunged into darkness.

“And in that darkness will be a righteous badger, waiting to bite your face off.”

The government stressed it was trying not to be intimidated by the badgers, but urged everyone to put their ears to their living room floors and listen for scratching, digging and swearing.

A spokesman said: “If you hear the badgers you must phone the army and then get into your car and drive as fast as you can in any direction for at least 24 hours.”

Prime minister David Cameron added: “This is very frightening. I am terrified.”

FrankelInFoal Wed 19-Feb-14 14:56:38

Just posting this link to the BBC programme again, in case anyone missed it up thread.

Terrortree Wed 19-Feb-14 01:15:10

"All fights are an opportunity for negotiation"

My mantra when I drive over my sinkhole!

HoneyDragon Wed 19-Feb-14 00:51:45

*outs self

HoneyDragon Wed 19-Feb-14 00:51:17

Certainly a cracking headline <<ourself now>>

Sinkhole, just a hole

That's cheered the town no end.

FoxesRevenge Wed 19-Feb-14 00:45:05

Honeydragon Phew! grin

FoxesRevenge Wed 19-Feb-14 00:44:17

Mother Nature is certainly calling the shots. You can't fight her and shouldn't mess with her.

HoneyDragon Wed 19-Feb-14 00:43:55

And saying that I've just had confirmation it wasn't one grin

HoneyDragon Wed 19-Feb-14 00:42:11

We've just had one in town today. My initial thoughts were for the poor homes and businesses nearby. It wil bugger teir insurance sad

Terrortree Wed 19-Feb-14 00:41:01

In my tractor! But that is the sinkhole I know about. I could have 100 more that I don't know about.

Live life on the limit me!

FoxesRevenge Wed 19-Feb-14 00:38:55

Terrortree you drive over it??? Fuck that shock

Terrortree Wed 19-Feb-14 00:00:33

e.g. surpasses its water capacity.

Shit I need to go back to school!

Terrortree Tue 18-Feb-14 23:58:50

I have one between two of my fields but as it's covered up by fifteen feet of soil, you wouldn't know it was there. I do, however, crap myself when I drive over it!

The structure of surface land is that it is holds together sufficient enough for me to traverse it - the ground has essentially built a bridge over the water flow. However, if the ground water swells (e.g. surpass it's river capacity, just like a river, it would 'burst its banks'. The water would be forced into the weakest spots. Ergo, the pressure of a group of houses together, the weakest spot would be the garden area.

Just like squeezing a spot - all the stuff comes out of a diddy weakpoint!

SconeRhymesWithGone Tue 18-Feb-14 23:51:59

Making of a sinkhole

CrispyFB Tue 18-Feb-14 23:50:22

BBC article posted today was really interesting:

Bogeyface Tue 18-Feb-14 23:46:45

I feel so sorry for those people and their neighbours, they will never sell their homes, never get insurance.....they are stuck. sad

Faverolles Tue 18-Feb-14 23:37:52

Dissolve? blush

Yes, I've wondered if fracking would increase chances of sinkholes.
I've read it increases earthquakes.

Faverolles Tue 18-Feb-14 23:36:16

The most recent sinkhole was from gypsum dizzolving.
A geologist on tv said that a van sized lump of gypsum in a river would disappear within 18 hours.

FoxesRevenge Tue 18-Feb-14 23:35:38

The Etihad stadium in Manchester was built over and around old mines. It triggered off a cluster of around 100 earthquakes back in 2002.

Makes you wonder about all this fracking malarkey.

NigellasDealer Tue 18-Feb-14 23:29:30

yes gypsum or limestone, such as the karst around Trieste or in Florida, or chalk such as in the south of England. Or old mine workings.
(been reading up on sinkholes)

FoxesRevenge Tue 18-Feb-14 23:29:08

Scares the shit out of me. Florida is supposed to be one big sink hole. I don't think I could live anywhere if I knew it was at risk of that. Same with earthquakes.

AgentProvocateur Tue 18-Feb-14 23:28:11

I mean how far down do they go?

AgentProvocateur Tue 18-Feb-14 23:27:19

I'm glad you asked. I've been wondering too. These ones that swallow whole houses - where do they actually go?

FoxesRevenge Tue 18-Feb-14 23:26:48

They're quite common in Limestone areas apparently.

pixiepotter Tue 18-Feb-14 23:25:53

In this area there are parts with a lot of gypsum underground.The water erodes it and makes underground cavities, eventually the weight above it becomes too great and the surface collapses and falls down into the cavity leaving a big hole.

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