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Sink holes are surface subsidence structures that form due to the collapse of underground voids. These voids may form naturally (e.g. due to the dissolution of rocks such as limestone or gypsum by groundwater) or be man made (e.g. mine workings). The surface subsidence pit can vary greatly in depth and diameter from less than a metre wide and 1/2 a metre deep to tens of metres in diameter. They don't swallow people up, however it would be possible for a person to fall into one of these features. There have also been occurrences where they have formed under or close to buildings causing instability and even collapse and which have caused fatalities.
Some further explanation of the sink hole phenomenon along with pictures of sink holes and the damage they can cause can be seen by viewing the related links.
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Here rocks above this surface are forced up and over rocks below the surface?
This geological phenomenon is called overthrusting, where older rocks are pushed up and over younger rocks due to tectonic forces. It results in the older rocks being positioned above the younger ones.
Which Australian mammal swallows large amounts of soil with its food?
The echidna is the Australian mammal that swallows large amounts of soil with its food. The soil helps to aid in the digestion of insects by grinding them up in its stomach.
Is a volcano a geological hazard?
no its a geological disaster you waste man
Which organisation is setting up natural resource data centre in kolkata?
The Geological Survey of India is setting up a National Geoscience Data Center in Kolkata, India. This center will serve as a repository for geological and geoscientific data related to natural resources in the country.
Is when liquid water slowly dries up and turns into water vapor?
This is called evaporation phenomenon.
What is the sentence of swallows up?
The worm Ouroboros swallows up his own tail.
How much swallows can have babies?
Swallows can have up to 8 babies
What to do when a dog swallows extreme hot food and throws up?
clean it up
Does a hawk eat a crows?
Yes it does everyday they have interourse then it swallows it right up!
Can sprits go into peoples body?
This answer really is up to you to decide. There is no scientific evidence that suggests this is a real phenomenon, but there are people, and cultures of people, who believe it is possible.
What do laws and theorys have in common?
A theory is what many people working together have come up with to answer a question. A law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The speed of light is a law.
How does a hermit crab eat?
it picks the food up with its claws then puts it in its mouth and swallows
How long do swallows live for?
Swallows typically live for 2-5 years in the wild. However, some species can live up to 8 years.
What is a good website to look up rock information?
Any of the national geological surveys, for example the British Geological Survey.
How long do swallows live?
Swallows usually live about three to four years. There is a record of a barn swallow that lived to be eight years old.
Here rocks above this surface are forced up and over rocks below the surface?
This geological phenomenon is called overthrusting, where older rocks are pushed up and over younger rocks due to tectonic forces. It results in the older rocks being positioned above the younger ones.
Did Chattanooga flood in1860?
More than likely. Up until the TVA was founded, the town flooded about twice a year according to historical records. Given that the river is the main geological feature between two mountains, it would seem that flooding was a natural phenomenon for the city.
