RE: Tell us about the dinosaurs
November 5, 2010 at 8:16 am
(This post was last modified: November 5, 2010 at 8:35 am by orogenicman.)
(November 5, 2010 at 12:20 am)Chuck Wrote: Megnetic reversal normally happens once every few hundred thousand years without correlation to extinction i know of. But Looking at a time-polarity plot of the earth's magnetic field, there seems to be anomalous periods where the polarity magnetic fields remain unchanging for tens of millions of years. One seem to last 40 million years in upper Cretaceous starting roughly with the emplacements of Ontong Java Igneous province, another seems to last 50 million years right through the emplacements of Emaishan trap, but ending roughly when Siberian traps were emplaced. However there seems to be no such period clearly associated with emplacements of Deccan trap or Columbia River trap. So on first glance I might say the coincidence between emplacements of LIP and long periods of anomalous polar stability is accidental. Orogenicman?
Here is a link to the geologic timescale that includes magnetic reversals that the GSA has produced:
http://www.geosociety.org/science/timescale/timescl.pdf
While admittedly, this is not my area of expertize, I'd say any link between the two are purely incidental. Having said that, there are supporters:
http://www.sciencedirect.com/science?_ob...archtype=a
http://books.google.com/books?id=JaV8V8m...es&f=false
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"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
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"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero
-- Samuel "Mark Twain" Clemens
"I think that in the discussion of natural problems we ought to begin not with the scriptures, but with experiments, demonstrations, and observations".
- Galileo Galilei (1564-1642)
"In short, Meyer has shown that his first disastrous book was not a fluke: he is capable of going into any field in which he has no training or research experience and botching it just as badly as he did molecular biology. As I've written before, if you are a complete amateur and don't understand a subject, don't demonstrate the Dunning-Kruger effect by writing a book about it and proving your ignorance to everyone else! "
- Dr. Donald Prothero
