How do we know radiometric dating is accurate

Rated 4.10/5 based on 683 customer reviews

At the rate of deposition postulated by Schuchert, 1000 years, more or less, would have been required to bury a shell 5 inches in diameter.

With very local exceptions fossil shells show no evidence of such long exposure." Principles Of Stratigraphy, p.128. T., "Because they are one of the commonest and most widespread of original sedimentary features, they have been described and illustrated in countless reports. Ripple marks are preserved in conglomerates, sandstones, and siltstones, and in clastic limestones and dolostones. Many examples have been described from rocks of all ages..." Sequence In Layered Rock, p.93, 95. '" Science, Research News, V.261, 9/7/'93 "I had one reviewer tell me that he didn't care what the data said, he knew that what I was finding wasn't possible, says Schweitzer.

..geologist has more faith in the fossil evidence than in a machine date, and this reflects some of the uncertainties of radiometric determinations and the interpretation of results." CASCADIA, The Geological Evolution Of The Pacific Northwest, p.25, 27 NOT CONCORDANT, Joan C. The samples, in fact, may be very recent...", Science, Vol.162, p.265 PRECISION DATING? Research News, Science, "The calculated age was quickly refined to be 2.61 0.26 million years, which, to anthropologist unfamiliar with the procedures of radiometric dating, has a ring of comforting precision about it. which varied between 223 million and 0.91 million years ...after the first determination they never again obtained 2.61 from their experiments." Bones Of Contention, p.194 AGES IN ERROR", Robert E. There is no absolutely reliable long-term radiological 'clock'".

When the charges were investigated, it was discovered, sure enough, if they had heard them used in the context of the lecture, they would have seen that the use was appropriate. When such individuals acknowledge facts contrary to their own interest, the credibility of their testimony increases dramatically.

This finding was the snowball that started the whole avalanche.", Nature Of The Darwinian Revolution, p.3. George Wald, Nobel Laureate, Harvard, "One has only to contemplate the magnitude of this task to concede that the spontaneous generation of a living organism is impossible. One has only to wait: time itself performs the miracles," The Physics And Chemistry Of Life, p.12. These assumptions furnish the most serious limitations on the accumulation clock. The discrepancies between the rejected and the accepted are arbitrarily attributed to excess or loss of argon." Canadian Journal Of Earth Science, 4. ...ground-water percolation can leach away a proportion of the uranium present in the rock crystals.

Yet, here we are - as a result, I believe, of spontaneous generation." Scientific American, Vol. 2, p.46 "However improbable we regard this event, or any of the steps which it involves, given enough time it will almost certainly happen at least once. Rigorously closed systems probably do not exist in nature, but surprisingly, many minerals and rocks satisfy the requirement well enough to be useful for nuclear age determination. These types of errors, which can beset even the most meticulous radiometric analysis, often add up to sizable total errors..." Earth And Life Through Time, 1986, p.122. The mobility of the uranium is such that as one part of a rock formation is being improvised another part can become abnormally enriched..relatively low temperatures." Scientific American, Vol.235 (6):118 "DATING MOON SAMPLES: Pitfalls And Paradoxes", Everly Driscoll, "What complicates things for the uranium-lead method is that non-radiogenic lead 204, 206, 207 and 208 also exist naturally, and scientists are not sure what the ratios of non-radiogenic to radiogenic lead were early in the moon's history...

In the Coal Measures of Nova Scotia, for example, the stumps and trunks of many trees are preserved standing upright as they grew, clearly having been buried before they had time to fall or rot away.

Here sediment certainly accumulated to a depth of many feet within a few years.

Leave a Reply