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Author Topic: How Are Arches At The Seaside Formed ?  (Read 4856 times)

Offline neilep

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How Are Arches At The Seaside Formed ?
« on: 24/03/2010 15:08:24 »


Dearest Archologists..

As a sheepy I of course luff seaside arches. Seaside Arches are my all time favourite type or arch that is found by the sea !

Look, here's a seaside Arch !


A Seaside Arch Just Moments Ago

Nice eh ?...my word that's a beauty isn't it !!?..as far as seaside arches ago..that's a looker all right !!...arooga arooga hubba hubba !!



Being shrunk and delivered for use in my fish tank next Tuesday.



How do those arches form ?...I don't know but I reckon it's in the realm of the seaside fairies..I am sure I am close but just in case I am not right can ewe explain to me using the power of words to help me understand the nature of seaside arch forming !


Thank ewe


hugs & shmishes

mwah mwah mwah mwah




Neil
Do Ewe Listen To The Archers ?
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Offline Geezer

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How Are Arches At The Seaside Formed ?
« Reply #1 on: 24/03/2010 18:13:17 »
Are you sure that's the seaside?

Looks more like Archie the heffulump sploshing around in his paddling pool to me.
 

Offline Mazurka

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How Are Arches At The Seaside Formed ?
« Reply #2 on: 25/03/2010 12:34:43 »
No fairies, just rock goblins chipping away when you aren't looking.


In broad terms;
Weak areas of rock on a headland are hammered by waves. (The weak areas are generally either faults, joint sets (in limestone) bedding planes or tension cracks)

Eventually this forms a cave.
If the weakness runs across the headland, eventually the cave will work its way all the way through to the other side (or 2 caves meet in the middle) thus forming an arch.
If the weakness just runs back in land it will just form a deep cave or very occasionally a blow hole.
The erosion will continue, until the arch collapses.  If the rocks are right, this may leave a stack, or it may just all fall into the sea.

Nice little vid explainign it...http://www.blip.tv/file/1324806/
 

Offline neilep

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How Are Arches At The Seaside Formed ?
« Reply #3 on: 25/03/2010 17:04:10 »
Are you sure that's the seaside?

Looks more like Archie the heffulump sploshing around in his paddling pool to me.

Why yes..yes it does look like Archie the heffulump............gosh !!...maybe it is !!  ::)
 

Offline neilep

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How Are Arches At The Seaside Formed ?
« Reply #4 on: 25/03/2010 17:05:23 »
No fairies, just rock goblins chipping away when you aren't looking.


In broad terms;
Weak areas of rock on a headland are hammered by waves. (The weak areas are generally either faults, joint sets (in limestone) bedding planes or tension cracks)

Eventually this forms a cave.
If the weakness runs across the headland, eventually the cave will work its way all the way through to the other side (or 2 caves meet in the middle) thus forming an arch.
If the weakness just runs back in land it will just form a deep cave or very occasionally a blow hole.
The erosion will continue, until the arch collapses.  If the rocks are right, this may leave a stack, or it may just all fall into the sea.

Nice little vid explainign it...http://www.blip.tv/file/1324806/


Thank ewe very much Mazurka !

I understand it now,...and the video helps to explain it too.....gosh !..I now know this stuff !.YAYYYY !!
 

Offline Bailey

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How Are Arches At The Seaside Formed ?
« Reply #5 on: 26/03/2010 09:15:23 »
hello neilep..how are ewe(haha)check out admirals arch on kangaroo island in south australia its a beauty..id post a link,but as you may have guessed im fairly newe to the hi tech world of computers..
 

Offline neilep

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How Are Arches At The Seaside Formed ?
« Reply #6 on: 26/03/2010 10:33:00 »
hello neilep..how are ewe(haha)check out admirals arch on kangaroo island in south australia its a beauty..id post a link,but as you may have guessed im fairly newe to the hi tech world of computers..


Thanks Bailey !!



I suspect these pictures do not do it justice !!

I could not find any images of the arch taken from it's other side !!





 

Offline geo driver

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How Are Arches At The Seaside Formed ?
« Reply #7 on: 26/03/2010 10:41:53 »
wow that is awesome
 

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How Are Arches At The Seaside Formed ?
« Reply #7 on: 26/03/2010 10:41:53 »

 

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