Originally posted by Helen:
Robert Brown is past director of the Geoscience Research Institute. Yes, it is SDA and out of Loma Linda University. It is also respected worldwide among those on both sides of the evolution and ages arguments.
As far as implying academic misconduct, I guess you don't know about radiocarbon dating! Go to Google. Type in Radiocarbon "best fit" and you will get nearly a thousand hits, some of which will explain the method in detail for you.
When Carbon Dating was first proposed as a method of dating ancient wood and such, it was necessary to develop the theory by assuming the production of Carbon 14 in the atmosphere is constant. The carbon 14 is, of course, self-removing, as
it decays. It is produced in the atmosphere by the actions of cosmic rays, which we presume to be incoming in a fairly regular manner. The dating method was not just dreamed up and tried without testing! The first originators of the method tested it against wood taken from pharonic tombs and other known age sources. They found that the assumption of uniformity was a workable assumption, and therefore people began using the method.
Then came tree ring dating. Everybody knows that trees grow a new ring every year, and you can count the years backwards from the date of cutting it down and see how old it is. One can even discern good years from bad years by the width of the ring. Well, guess what. By matching up patterns of good years from bad years across many trees, we can work a chronology backwards for a good 10 thousand years! And this means we have an absolute yearly reference going back.
Sure, sometimes a tree here and there will skip a year and there are such things as double rings once in a great while, but such events are rare and the odd tree here and there with such an anomaly can be corrected for because they don't just check one tree. They check hundreds of trees and they check them all over the world in different climate zones and they keep checking all the time, because they found something out . . .
Cosmic ray conversion of nitrogen to carbon 14 was NOT absolutely constant over the Milena!
So how far did the tree rings reveal they were off? Something like about 10 or 12 percent, that's all, not enough to save young earth believers, indeed, they found that they had to correct the ages they had determined before checking against tree rings in the wrong direction for young earthers - instead, they pushed it further back! And the line was not a straight line of correction, there were WIGGLES in the line, apparently the production of carbon 14 in our atmosphere cycles both up and down a bit over the centuries.
So did this invalidate the older work? For the purpose of our discussion, it did not. It merely represents a fine tuning of the previously sound work.
BUT WAIT - THERE'S MORE!
In Japan, Lake Suigetsu has been extensively investigated because it has annually accumulating material in the lake bottom going back over 40,000 years. The twigs and leaves that accumulated there as well are also dated by the carbon dating method.
Here's a link to one of the scientific reports from such investigations:
http://www.cio.phys.rug.nl/HTML-docs/Verslag/97/PE-04.htm
If any of you will take the time to read this article, you will find that they also count annual layers, only this time it's not tree ring growth, it's sediment accumulating in the bottom of the lake, more or less constantly. How can they tell an annual layer? By the SPRING DIATOMS that come and go with the years.
And they have tens of thousands of layers to work with.
Now I've read some of your posts where, in the past, Helen, you have asserted that the annual layers of this lake could have, perhaps, been actually more frequent than once per year because of WILD STORMS that bring in surges of layers much more rapidly than yearly, especially at the time of the world wide flood.
At the same time those wild storms you propose were assaulting the lake in Japan, without removing the sediments but instead mimicking annual sediments, what do you suppose was happening to the trees as they tried to grow rings? Stressed out trees that are experiencing wild swings of weather are one of the things that
will make a tree SKIP a ring for a year. So if the lake is experiencing extra layers (strangely marked with perfectly even pollen counting, as they form) we would expect trees to react differently, skipping rings where the lake is accumulating layers.
Strangely enough, however, when the scientists investigating the layers in the lake bottom counted them as annual layers (just because of those pesky spring diatoms, you know) and then did carbon 14 dating of the layers (not the mud, but the twigs and leaves trapped in the mud) they found the SAME VARIATIONS in the actual production of carbon 14 that was reported by the TREE RING counters! With all the wiggles in the same places!
Now the scientists think this is stunning confirmation that the entirely separate age determination by the tree ring studies (of which there are many) is on the right track. But for a young earth creationist like yourself, Helen, I don't see how you can possibly explain how two physically distinct mechanisms - tree ring
growth versus lake sediment accumulation - can both come up with the same age and the same carbon dating adjustments down to the details of the wiggles in the curve unless they are both actually measuring the real thing, that is, an earth that is older than 6000 or 10000 years.
More history of radiocarbon dating:
http://www.c14dating.com/int.html
One last point. Let me point out that carbon 14 dating can be projected back 40 to 50 thousand years ago. We CANNOT CHECK tree rings back that far. We can only go back about 10,000 years with tree rings, due to the ice age ending about that time. But tree rings continue to be investigated all over the world and the years they can be used to verify the the carbon dating scheme will be pushed further and further back.
But I submit that with the dates VERIFIED BY ABSOLUTE RING COUNTING (and now, lake sediment counting as well) then we have every reason to accept the longer date ranges for the carbon dating series.
Other radioactive element series, of course, allow us to verify ages backwards for millions and billions of years.