The Wandering Poles

Geology makes use of the fact that fossilised magnetism in igneous rocks, puport to document the field strength and direction of the geomagnetic field during the Earth’s evolution allowing the theory of plate tectonics, for example, to develop. Other examples are the interpretations of crustal rotation from these fossilised remnants of the geomagnetic field, or if we wish to proper about our lexical norms, palaemagnetism marking the inferred position of the palaeopoles (and nothing to do with prehistory Polish people). So a summary of the positions of the poles might be a useful thing to do.

NOAA has the published the data on the their website here, and the graphics are reproduced below

NOAA geomag poles.PNG

One thing that is crystal clear is that both geomagnetic poles are continually on the move at rates far exceeding any plausible tectonic plate movement, so if remnant palaeomagnetism is proposed as a record of past plate motion, one has to be living in la-la land.

The existing motion is also occurring at a far greater rate than any possible internal mechanism of the Earth is capable of, say currents flowing in the upper mantle for example. Which leads to the conclusion that the geomagnetic field is driven externally and the main candidates would be the co-rotating plasma torus comprising the Van Allen Belts as well as the polar Birkeland currents.  Hannes Alvens solar model would be a useful starting point.

Physical rotation of crustal fragments do need to be accompanied with structures showing rotational features, and not from inferred palaeo pole positions as derived from remnant geomagnetism. After all, the geomagnetic field is anything but a static reference point and evidence of a careening earth in response to external forces also exists.

The problem is the belief that the Earth has been in its present position for the whole of its existence along with the Sun and other solar system members. Historical evidence suggesting otherwise is dismissed as myth. (Which is a strange attitude to have considering the consensus surrounding the modern day myth of Carbon Dioxide Force).

About Louis Hissink

Retired diamond exploration geologist. I spent my professional life looking for mineral deposits, found some, and also located a number of kimberlites in NSW and Western Australia. Exploration geology is the closest one can get to practicing the scientific method, mineral exploration always being concerned with finding anomalous geophysical or geochemical data, framing a model and explanation for the anomaly and then testing it with drilling or excavation. All scientific theories are ultimately false since they invariably involved explaining something with incomplete extant knowledge. Since no one is omniscient or knows everything, so too scientific theories which are solely limited to existing knowledge. Because the future always yields new data, scientific theories must change to be compatible with the new data. Thus a true scientist is never in love with any particular theory, always knowing that when the facts change, so too must he/she change their minds.
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