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Scientific research
It is now established that true polar wander has occurred at various times in the past, but at rates of 1° per million years or less.[2][3][18] Analysis of the evidence does not lend credence to Hapgood's hypothesized rapid displacement of layers of the Earth.[19] Although Hapgood drastically overestimated the effects of changing mass distributions across the Earth,[citation needed] calculations show that changing mass distributions both on the surface and in the mantle can cause true polar wander.
"We know that there is no absolute knowledge, that there are only theories; but we forget this. The better educated we are, the harder we believe in axioms. I asked Einstein in Berlin once how he, a trained, drilled, teaching scientist of the worst sort, a mathematician, physicist, astronomer, had been able to make his discoveries. 'How did you ever do it/ I exclaimed, and he, understanding and smiling, gave the answer:
" 'By challenging an axiom I' "
Lincoln Steffens, Autobiography (p. 816)
FOREWORD by Albert Einstein
I frequently receive communications from people who wish to consult me concerning their unpublished ideas. It -goes without saying that these ideas are very seldom possessed of scientific validity. The very first communication, however, that I received from Mr. Hapgood electrified me. His idea is original, of great simplicity, and if it continues to prove it- selfof great importance to everything that is related to the history of the earth's surface.
A great many empirical data indicate that at each point on the earth's surface that has been carefully studied, many climatic changes have taken place, apparently quite suddenly. This, according to Hapgood, is explicable if the virtually rigid outer crust of the earth undergoes, from time to time, extensive displacement over the viscous, plastic, possibly fluid inner layers. Such displacements may take place as the consequence of comparatively slight forces exerted on the crust, derived from the earth's momentum of rotation, which in turn will tend to alter the axis of rotation of the earth's crust.[....]
Mechanisms for oscillatory true polar wander
November 2012
Palaeomagnetic studies1, 2, 3, 4, 5 of Palaeoproterozoic to Cretaceous rocks propose a suite of large and relatively rapid (tens of degrees over 10 to 100 million years) excursions of the rotation pole relative to the surface geography, or true polar wander (TPW). We speculate that these sources of stabilization, acting on TPW driven by a time-varying mantle flow field11, 12, 15, 16, 17, 18, provide a mechanism for linking the distinct, oscillatory TPW events of the past few billion years.
The Piri Reis map is a pre-modern world map compiled in 1513 from military intelligence by the Ottoman admiral and cartographer Piri Reis. The approximately one-third of the map that survives shows the western coasts of Europe and North Africa and the coast of Brazil with reasonable accuracy. Various Atlantic islands including the Azores and Canary Islands are depicted, as is the mythical island of Antillia and possibly Japan. The historical importance of the map lies in its demonstration of the extent of exploration of the New World by approximately 1510, perhaps before others.
Originally posted by ZeuZZ
Should this be moved to Ancient & Lost Civilizations, or Science, do people think? Or is this the suitable forum?
To be honest, it seems suitable for ALL of them to meedit on 13-12-2012 by ZeuZZ because: (no reason given)
Originally posted by AndyMayhew
reply to post by ciscoagent
Yes, he proposed a theory of crustal displacement to explain certain geologica anomalies which were then shown to be much better explained by plate tectonics. Meanwhile Hapgood's theory was falsified on several levels both from evidence availabe at the time and, especially new evidence dscovered in the past 60 years.
The theory is now as dead as the idea continents are stationary relative to one another. Or that Pluto is the largest body in the solar system beyong Neptune.
(and the Piri Re'is map shows the bottom part of S America. Not Antartica - it's obvious if you look for yourself.)
Originally posted by ZeuZZ
If it's been falsified, then please explain why. Scientifically.
If you do not believe in it then how do you explain the Iceage and similar phenomenon ?
Originally posted by NoExpert
As a geologist myself I always find this subject interesting in that it fascinates me how a lack of understanding can spurn such wild theories. There is no possible way that the Earth's crust could suddenly rotate. Not on a time-scale on 1 year, 100 years or even a thousand years; there is simply no mechanism for it to do so.
I think a lot of this has to do with the media, whenever a story about the Earth's interior (say in the aftermath of an earthquake) comes up, the plates are always represented as floating on the mantle. Let's be clear on this: that is not at all what it is like. The mantle is - for all intents and purposes - as solid as any rock you would pick up in a quarry, it only takes on a plastic quality over geologic time-scales and thus effectively the Earth can be thought of as solid all the way down to the outer core, which even then isn't a liquid with the viscosity of water...
I'd be happy to elaborate further on any points but this is one theory that is not improbable but impossible.
Originally posted by ZeuZZ
Thanks! Nice to have a geologist on board.
So, as we can discern, the mantle is just about 'as solid as a rock'. I presume that this is due to a gravitational pressure gradient acting on the malleability of a viscous fluid as it is acted on under centripetal gravitational rotation.
So where in this gradient do the fluid hydrodynamic equations come into play over the 'solid as a rock' physics ? The same hydrodynamic equations that give rise to the entire Earths magnetic field in the first place ?
Originally posted by ZeuZZ
...Could this Earth Crust Displacement Hypothesis be the next similar frontier in geology?