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Originally posted by Rocketman7
Martin Redfern is a senior producer in the BBC Radio Science Unit, where he has worked for most of the last 25 years. He joined the BBC as a studio manager after graduating from University College London, where he studied geology. He has spent time as a science producer in BBC TV and as science news editor for BBC World Service. Most of his work now is on science feature programs for Radio 4 and World Service, where he enjoys pushing the boundaries of science. In 2005, he won the Science Writers' Award from Association of British Science Writers for "the best scripted/edited radio programme on a science subject." He has also written extensively on science for magazines and newspapers and, more recently, popular science books. In quiet moments he enjoys the natural world and especially the small corner of it behind his home in Kent.
edit on 8-2-2012 by Rocketman7 because: (no reason given)
Originally posted by Byrd
I really had to respond to this as well.
Originally posted by Rocketman7
Martin Redfern is a senior producer in the BBC Radio Science Unit, where he has worked for most of the last 25 years. He joined the BBC as a studio manager after graduating from University College London, where he studied geology. He has spent time as a science producer in BBC TV and as science news editor for BBC World Service. Most of his work now is on science feature programs for Radio 4 and World Service, where he enjoys pushing the boundaries of science. In 2005, he won the Science Writers' Award from Association of British Science Writers for "the best scripted/edited radio programme on a science subject." He has also written extensively on science for magazines and newspapers and, more recently, popular science books. In quiet moments he enjoys the natural world and especially the small corner of it behind his home in Kent.
edit on 8-2-2012 by Rocketman7 because: (no reason given)
Redfern's a very nice man, but he's a reporter who studied geology. He's not a scientist and he's not a geologist. He knows far more than any of us about tv, production, sound quality, newscasting, science broadcasting and the like but he can't hold his own in a room full of geologists who have been working and mapping in the field for the past 25 years.
Originally posted by Byrd
Originally posted by Rocketman7
So ok, what about this?
planetearth.nerc.ac.uk...
That article, at the bottom, says it's pick marks. So. you've sort of proved Hans' point.
www.abc.net.au...
Silvia Gonzalez : We know that the magma that produced the ash came in contact with the water, there was some mighty explosion, parts of the terrain around were incorporated into the ash and that's the reason why the ash is very heterogeneous is you've got different particles coming off different materials that is part of the lake sediments that are baked with the heat of the magma and then they are incorporated and they are a very prominent feature of this ash; quite unique, you don't see this very often.
And on the wall here you can see several holes, cylindrical holes, where we have taken samples to do dating. And we have tried optically stimulated luminescence dating on this wall and on the ash itself. What you measure with optically stimulated luminescence is the last time that these sediments were lit by the sun's rays or the last time that the material was heated. My collaborator Jean-Luc Swenninger from the Oxford Luminescence lab realised that there were these very interesting brick particles in the ash and luminescence has been normally used for pottery in the past. So he treated these particles as bits of pottery and the results he got were quite staggering because he got ages of about 40,000 years for this ash.
Ages can be determined typically from 300 to 100,000 years BP, and can be reliable when suitable methods are used and proper checks are done. Ages can be obtained outside this range, but they should be regarded with caution. The accuracy obtainable under optimum circumstances is about 5%.
The quickly cooled lavas that make nearly ideal samples for K–Ar dating also preserve a record of the direction and intensity of the local magnetic field as the sample cooled past the Curie temperature of iron. The geomagnetic polarity time scale was calibrated largely using K–Ar dating.[2]
Martin Redfern: And what about the reversed magnetic polarity?
Silvia Gonzalez : Well that is a very interesting point as well because indeed the last time that the magnetic field was reversed was about 780,000 years ago. But however we know that there are very short-lived excursions of the earth magnetic field and one of those happened about 40,000 years ago. About that time the earth magnetic field flipped to the reverse polarity but only for about 1,500 years so we are currently exploring the possibility of having this event recorded in this lava, which would be quite astonishing.
Paul Renne: Ha, ha, ha - how did I know they were going to say that? I have not heard this coming from this group but it doesn't surprise me at all. There is a finite possibility that that is correct, I cannot rule that out. For us to have captured one of those however, the probability is extremely low.
Originally posted by Rocketman7
You are not familiar with the term 'spin'?
Dating of the Valsequillo volcanic deposits: Resolution of an ongoing archaeological controversy in Central Mexico
Darren F. Marka, Silvia Gonzalezb, David Huddartb, Harald Böhnelc
First, if I am debating an archaeologist, how good an archaeologist? As good as me?
Originally posted by Hanslune
Originally posted by Rocketman7
You are not familiar with the term 'spin'?
Yes you are doing it now - you should read the article that comments on this. If you don't like the science, fund another report - you are allowed to do that
Report
Now this reports on the report in the May 2010 .
The report is available for purchase here
Dating of the Valsequillo volcanic deposits: Resolution of an ongoing archaeological controversy in Central Mexico
Darren F. Marka, Silvia Gonzalezb, David Huddartb, Harald Böhnelcedit on 14/2/12 by Hanslune because: (no reason given)
Originally posted by Rocketman7
More spin.
But enough. Its like anything else, you will never be able to change a person's mind about anything, when it reaches this level of ignorance.
Originally posted by Hanslune
Originally posted by Rocketman7
More spin.
You might try reading the 2010 article you are trying to argue from superceded data and opinions.
But enough. Its like anything else, you will never be able to change a person's mind about anything, when it reaches this level of ignorance.
So true!
However not all is lost - another investigation in the future may over turn this investigation - it does occur!
Example:
I'm a believer that the Polynesians push on from Rapa Nui to South America, to date no evidence has supported this conclusion
Some years a go a chicken bone was found and touted as the proof (finally)......another studied showed that the original claimers had made an error...damn.....still waiting for a counter-counter-study to over turn that!edit on 14/2/12 by Hanslune because: (no reason given)
Could they be footprints of some human precursor "hominid" species? Archaeologists have looked for signs of older human species, such as homo erectus, which was living in Asia more than a million years ago, but have seen no signs of them in the New World, Mark says. "Considering what we know about the timings of hominid migrations out of Africa up into Europe and Asia, it is highly improbable that hominids could have made it to the America's by 1.3 million years before present."
Originally posted by Rocketman7
So this is now about scientism the religion, and no longer about science. Personally I am not a follower of Darwin. I am not one of his disciples.
One of the faithful as it were. I'm just a scientist
Originally posted by isyeye
One question about this....They keep refering to this as being jade, but considering the differences that they state about it, how do they know that this IS a form of jade?
Perhaps it's something completely different, and is NOT jade. It's possible considering that it has some much differences between it and other known examples.
Originally posted by Rocketman7
Lets say for the sake of argument then, that footprints of modern man, were discovered in Mexico which were found to be 1.3 million years old, by argon-argon dating.
Whats my point? I suggest the tells of an earlier time, and on the upper right middle, you see your typical alien droopy headed one, leading from the rear, following the Olmecs to China.