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Scientists Solve Mystery of Ireland's Moving Boulders

Hugh Pickens writes "How has a 78-ton boulder traveled 130 meters inland from the sea since 1991? Live Science reports that geologists have puzzled for years over the mysterious boulders that litter the desolate coastline of Ireland's Aran Islands that somehow move on their own when no one is looking. The sizes of the boulders in the formations range 'from merely impressive to mind-bogglingly stupendous,' writes geoscientist Rónadh Cox. While some researchers contend that only a tsunami could push these stones, new research finds that plain old ocean waves, with the help of some strong storms, do the job. Some boulders move inland at an average rate of nearly 3 meters per decade, with one rock moving 3.5 meters vertically and 69 meters horizontally in one year. The team compared modern high-altitude photos of the coastline to a set of meticulous maps from 1839 that identified the location of the boulders' ridges — nearly 100 years after the most recent tsunami to hit the region, which struck in 1755. The Aran cliffs rise nearly vertically out of the Atlantic (video), leaving very deep water close to the shore. As waves slam into the sheer cliff, that water is abruptly deflected back out toward the oncoming waves. This backflow may amplify subsequent waves resulting an occasional storm wave that is much larger than one would expect. 'There's a tendency to attribute the movement of large objects to tsunami,' says Cox. 'We're saying hold the phone. Big boulders are getting moved by storm waves.'"

24 of 127 comments (clear)

  1. Well holy god by hmmm · · Score: 5, Funny

    Next thing "science" will probably try and explain moving statues.

    1. Re:Well holy god by Anonymous Coward · · Score: 2, Interesting

      I thought he was making a Doctor Who reference.

    2. Re:Well holy god by thePig · · Score: 4, Insightful

      My understanding is that they have not solved it, rather they have just suggested a mechanism. They found that even when there are no tsunamis the rocks are moving. They now think that storm waves could be a reason for it. If I understand correctly, they have not done the calculations for it.

      So, now we have a hypothesis. Once the calculations and simulations are done, only then we will know for sure. Moving such big rocks means a lot of energy. Especially when it doesnt float. Can a positive feedback loop generate this much energy ? If so, who knows, positive feedback tidal waves could be the next big thing in renewable energy :)

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      rajmohan_h@yahoo.com
    3. Re:Well holy god by Smallhacker · · Score: 2

      Don't. Blink.

    4. Re:Well holy god by Troyusrex · · Score: 4, Interesting

      Once the calculations and simulations are done, only then we will know for sure.

      I couldn't agree LESS. Simulations don't prove anything. They are just imperfect models of the world to help our understanding. Proof would be to measure a REAL storm wave moving the bolder.

  2. I thought the cause was established years ago by Grayhand · · Score: 4, Funny

    I was always told the cause of seeing boulders move in Ireland was Whiskey.

    1. Re:I thought the cause was established years ago by c0lo · · Score: 4, Funny

      I was always told the cause of seeing boulders move in Ireland was Whiskey.

      Depends... if you see the boulder moving up, 't's Whiskey and you're lying on the ground... if downward, it's stout (and you're taking a leak on the boulder).

      --
      Questions raise, answers kill. Raise questions to stay alive.
  3. Sea aliens?? by dkf · · Score: 3, Interesting

    Why would anyone think that sea aliens would do such a thing, when there are Selkies about?

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    "Little does he know, but there is no 'I' in 'Idiot'!"
  4. Re:Wow by sleiper · · Score: 5, Interesting

    It was a local man that told the US students about how the sea "washed" a 78 tonne boulder up onto the beach. I would suggest the locals knew this happened and just didn't care or bother to work out why. Occasionally a storm will blow sea-weed from the beach 2 miles to my front door during a storm, so I assume that's normal because it always happens. Their rocks are just a bit bigger :D

  5. I went to a catholic school in Northern Ireland by neokushan · · Score: 3, Funny

    In the middle of one of our courtyards, we had a small shrine with a statue of Mary, depicting the appearance of her at Lourdes. There was also a lot of rocks and plants for decoration.

    One day, we came into school and one of the larger boulders had been moved across the yard to the other side. It had a note attached to it saying "It's a miracle, it moved!".

    True story.

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    +1 IDisagreeSoHeMustBeATrollOrAnAstroturferOrAShill
  6. Re:Wow by sleiper · · Score: 2

    Depends if you are taking a Sociological or Anthropological view of race.

  7. Re:Density is what matters by laejoh · · Score: 2

    A duck!

  8. And no mention of their American Cousins? by way2trivial · · Score: 5, Interesting

    has no one heard of the sailing stones?
    http://en.wikipedia.org/wiki/Sailing_stones

    Sailing stones, sliding rocks, and moving rocks all refer to a geological phenomenon where rocks move in long tracks along a smooth valley floor without human or animal intervention. They have been recorded and studied in a number of places around Racetrack Playa, Death Valley, where the number and length of travel grooves are notable. The force behind their movement is not confirmed and is the subject of research.

    Which by the way- occur on land masses devoid of water????

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    every day http://en.wikipedia.org/wiki/Special:Random
    1. Re:And no mention of their American Cousins? by drinkypoo · · Score: 5, Informative

      The force behind their movement is not confirmed and is the subject of research.

      Irony: It has been confirmed, and it is ice

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    2. Re:And no mention of their American Cousins? by JasterBobaMereel · · Score: 2

      Death valley, is not devoid of Water, it does actually get very cold there sometimes ....

      The Sailing stones probably move by differential ice formation

      The rocks in Ireland were assumed to have moved during the last Tsunami (1700's) but now someone has bothered to study them, they have found they have definitely moved recently, just like the locals said all along) , the mechanism is unlikely to be the same as the desert rocks ...?

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      Puteulanus fenestra mortis
  9. Re:Wow by ObsessiveMathsFreak · · Score: 2, Insightful

    I guess for some people the world just never moved on from the 1950s.

    Well I'm Irish, living in Ireland, and as far as I can tell from watching the country fall apart around me; no, things don't seem to have moved on very much at all.

    The country was bankrupted by a drunken Taoiseach, and is now being pauperised by religious one. People are emigrating in droves and TDs respond by complain about the problems of "fornication". Landlords, lawyers, and bankers are living high on an ascendancy hoc while everyone else is being squeezed dry, and the country is once again a pawn in the games of European great powers.

    Frankly, things here don't seem to have moved on very much from the 1850s.

    Personally, I found the joke amusing. I'm faced with enough incompetence to know that it's probably half true anyway.

    --
    May the Maths Be with you!
  10. Re:Wow by Intrepid+imaginaut · · Score: 3, Interesting

    There isn't one sentence in there resembling reality. The country was bankrupted by a lying scumbag (Ahern) and an incompetent Finance Minister (Lenihan). Cowen was just a puppet. I must have missed the great fornication debate that seems to be taking up 100% of the time of 100% of the politicians in the country. Oh wait, no I didn't, because it was one back country TD making one ridiculous comment. More news you appear to have missed, the landlords of some twenty plus houses were forcibly evicted from their own palatial residence recently, there are plenty of unemployed solicitors, and even bankers have joined the dole queues. I know a few of them personally.

    Perhaps the time has come for you to take a good look in the mirror and ask yourself who is looking back, because its not someone with a firm grasp on reality. That's even if you are in Ireland, because nobody here refers to solicitors as "lawyers".

  11. Re:Wow by ObsessiveMathsFreak · · Score: 4, Funny

    Sorry to burst your bubble but the Irish are not a race.

    Oh no; we're a competition.

    --
    May the Maths Be with you!
  12. Re:Wow by garyebickford · · Score: 3, Funny

    Cool! An Irish flame war - that's something I haven't seen on /. before! *GB fills his cup, sits back to watch.

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    It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
  13. Climate Change by da007 · · Score: 2

    The oceans are just receding

  14. Title of summary is misleading. by hey! · · Score: 2

    Instead of "Scientists Solve Mystery of Ireland's Moving Boulders" it should read "Scientists *Deepen* Mystery of Ireland's Moving Boulders."

    This is what the linked article amounts to. Scientists believed that tsunamis moved the boulders in question. Comparing aerial photos to old surveys of the islands show that can't be the explanation, because boulders have moved since the last tsunami. The scientists then speculated that it might be rogue waves. Then they ginned up a plausible mechanism by which rogue waves might be more common on Aran than thought. Because it was plausible they concluded that *must* be the explanation, because the next best thing they could think up is little green men.

    For the record, I think rogue waves moved the boulders. I've seen what waves can do to stony reefs, and the power of water is not to be underestimated. But I have no proof, and neither do they. If the articles are to be believed (which is often doubtful), they researchers are building models around the *assumption* that it must have been rogue waves. Using such a model as evidence of its assumptions would be begging the question.

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    Post may contain irony: discontinue use if experiencing mood swings, nausea or elevated blood pressure.
  15. Re:Oblig Brian O'Nolan reference by bazmail · · Score: 2

    Living in the west of Ireland myself (Galway), I can tell you that is not true. I've never even heard of that improbably named gentleman who you claim is "one of Ireland's greatest humorous writers and a great student of the Irish language". (An unlikely name as in Irish, n never goes before c, also double-e would be an i "fada")

    Maybe he markets himself to americans as such to part you from your hard-earned. Who knows.

    A lot of Irish (and especially English, e.g. John Cleese, Sharon Osbourne etc) make a living in America by pandering to long held ethnic stereotypes that Americans fully believe in. This guy, assuming he is actually Irish, is just doing likewise. When you challenge the cherished and stereotypical view of the world that Americans hold dear, Americans get confused, resentful and angry.

    Hope you've learned something today.

  16. Re:Oblig Brian O'Nolan reference by H0p313ss · · Score: 2

    Brian O'Nolan

    Brian O'Nolan (Irish: Brian Ó Nualláin) (5 October 1911 – 1 April 1966) was an Irish novelist, playwright and satirist regarded as a key figure in postmodern literature.[1] Born in Strabane, County Tyrone, he is best known for English language novels such as At Swim-Two-Birds, and The Third Policeman (written under the nom de plume Flann O'Brien) as well as many satirical columns in The Irish Times and an Irish language novel An Béal Bocht (written under the name Myles na gCopaleen), O'Nolan has also been referred to as a "scientific prophet" in relation to his writings on thermodynamics, quaternion theory and atomic theory.

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    XML is a known as a key material required to create SMD: Software of Mass Destruction
  17. Re:Density is what matters by KhabaLox · · Score: 2

    Who are you, so wise in the ways of witchery?

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    Ceci n'est pas un sig.