Mario Dantas, on 11 April 2012 - 11:51 AM, said:
Leonardo,
You are right about my theory being related to a catastrophic impact event, 10.000 years ago. I disagree that in all circumstances it would sterilize the planet. There are many elements that could have prevented this from happening, e.g. the impact angle, the strength of the impact, whether the outer body penetrated the crust or just touched it, etc, etc. Thus, one cannot affirm that this or that happened without knowing the facts first. Modern Plate tectonics could be nothing less than the inertial force still acting upon the plates, since that event. When you look at how plates move nowadays you will notice that their motion is in all aspects corroborating that a sizable impact might have occurred in Indian ocean:
Regards,
Mario Dantas
I think you are seriously underestimating the amount of energy an impact would have to impart to effect the crustal movement you are envisaging. If an impact in the Indian Ocean could impart enough energy to melt (or partially melt) the sub-oceanic crust of the Atlantic, then consider the effect it would have closer to the point of impact!
You are essentially suggesting an impact that melts the crust of half (or over half) the planet. This is a monumental impact, larger than any we know of other than the postulated impact which caused the formation of our Moon. It
would sterilise the planet, which would even now not be out of the global winter caused by that impact. On top of this, we have no evidence from geological records, nor from climatological records, to indicate this impact ever occurred.
Notwithstanding all this, you would have to show the motion caused by this impact was slowly abating. Yet there is no data that I know of that indicates of any slowing of the movement of the crustal plates over time.
Edited by Leonardo, 11 April 2012 - 04:24 PM.
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