Factbites
 Where results make sense
About us   |   Why use us?   |   Reviews   |   PR   |   Contact us  

Topic: C14 dating


Related Topics
NIH

  
  NPS Archeology Program: Kennewick Man
The BA date (Beta-133993) gave a conventional radiocarbon age of 8410 +/- 40 BP (Hood 1999a and Attachment 1).
One problem with dating bone samples with low carbon is that exogenous or intrusive carbon may have infiltrated the bone and become mixed with the endogenous or inherent carbon.
Two of the dates match closely the C14 date obtained in 1996 on another bone fragment believed to be from the skeleton.
www.cr.nps.gov /archeology/kennewick/c14memo.htm   (2606 words)

  
  Glottochronology - Wikipedia, the free encyclopedia
Glottochronology was a linguistics method used to estimate the time of divergence of two related languages.
It is analogous to the use of C14 dating for measuring the age of organic materials, in that a "lexical half-life" is estimated and used to extrapolate to the point in time at which a given two languages diverged from a common proto-language.
The method presumes that the core vocabulary of a language is replaced at a constant (or near constant) rate, and therefore can be used to measure the passage of time.
en.wikipedia.org /wiki/Glottochronology   (311 words)

  
 Evolution -- Dating Methods
Dating is not necessary to demonstrate that evolution is a fact.
This is a relative, and sometimes absolute, dating method that relates the diagenesis of fossil protein preserved in carbonate materials with time (geologic age of the sample) and temperature (long term chemical temperature of the enclosing sediment).
Fission-track dating is one type of radioactive dating method used by archaeologists to determine the thermal age of artifacts containing uranium-bearing minerals.
darwiniana.org /datingmethods.htm   (2678 words)

  
 Evolution -- Dating Methods   (Site not responding. Last check: 2007-10-16)
The accuracy of radiocoarbon dating was tested on objects with dates that were already known through historical records such as parts of the dead sea scrolls and some wood from an Egyptian tomb.
This is a relative, and sometimes absolute, dating method that relates the diagenesis of fossil protein preserved in carbonate materials with time (geologic age of the sample) and temperature (long term chemical temperature of the enclosing sediment).
Fission-track dating is one type of radioactive dating method used by archaeologists to determine the thermal age of artifacts containing uranium-bearing minerals.
www.origins.tv /darwin/datingmethods.htm   (2692 words)

  
 TWD -- Radiometric Dating   (Site not responding. Last check: 2007-10-16)
Simply stated, radiometric dating is a way of determining the age of a sample of material using the decay rates of radio-active nuclides to provide a 'clock.' It relies on three basic rules, plus a couple of critical assumptions.
C14 dating serves as both an illustration of how useful radiometric dating can be, and of the pitfalls that can be found in untested assumptions.
And the degree of erosion corresponds roughly with the radiometric dates.
my.erinet.com /~jwoolf/rad_dat.html   (5908 words)

  
 AR11 - The Carbon 14 Mystery By Christopher Dunn
C14 is created when the reaction of cosmic rays with the ionosphere precipitates neutrons through the atmosphere.
Consequently, when radiocarbon dating came back with a result that showed artifacts to be between two and five hundred years younger than their established historical dates, they were not impressed.
The original assumption on which C14 dating was based is that its level in the atmosphere is the same at all times.
www.atlantisrising.com /issue11/ar11carbon.html   (1425 words)

  
 Shroud's Age   (Site not responding. Last check: 2007-10-16)
C14 is produced in the upper atmosphere resulting from a reaction between nitrogen and cosmic radiation.
Many geologists claim that carbon dating is an inaccurate way to measure the age of any given sample that may have been exposed to moisture, as was the shroud when it was soaked in flood waters.
The C14 is measured in the tree rings and the quantities used to estimate the C14 that existed in the atmosphere at that time period (simply by counting back on the rings of the tree).
www.delayedreaction.com /toc/age.html   (897 words)

  
 Date: 22 Feb 94 00:48:10 To: All Subject: Hovind on Radiometric Dating Here's another page
Morris arbitrarily limits C14 dating to 29000 years ago, because at that point only 1/32 of the original C14 content remains in the dead organism.
In C14 dating, organic samples that are "a few thousand years" old most assuredly do not appear "older than they really are." Based on dendrochronological calibration, a post-1500 BC organic sample is actually _younger_ that its C14 date (up to a century).
When a C14 date is considered anomalous, it is usually so because the archaeologist has been careless (e.g., misread the stratigraphy).
www.skepticfiles.org /evolut/hovind5c.htm   (1924 words)

  
 Archaeology: C14-Dating
The C14 is a isotope of carbon, which is otherwise C12 or C13.
The dating using any kind of isotopes is based on determining the ratio between stable isotopes and non-stable isotopes.
C14 dating is a very usefull dating method with some important drawbacks.
www.showcaves.com /english/explain/Archaeology/C14.html   (728 words)

  
 Carbon Dating   (Site not responding. Last check: 2007-10-16)
However, because of the difficulties with current C14 dating techniques, the dates produced have been shown to be faulty.
Carbon-14 is used for a dating material because once it has been formed, C14 begins to decay radioactively back to nitrogen-14, at a rate of change that can be measured.
Carbon dating assumes that the ratio has remained constant; however, events, such as the industrial revolution, are known to have raised C12 levels.
www.creationevidence.org /scientific_evid/carbon/se_carbon.html   (394 words)

  
 C14 Tests on the Shroud of Turin Botched
For all who use C14 dating to study all manner of ancient objects, a period of careful reassessment is just beginning.
This is not a condemnation of C14 dating.
The C14 dating of the Shroud is famous because those who had difficulty accepting the results were ridiculed and called fanatics by tough-minded skeptics.
www.shroudstory.com /c14.htm   (3324 words)

  
 C-14 Debate from alt.turin-shroud
Translating the C14 age into a "real age" for the Shroud is not the simplest explanation in terms of the totality of evidence.
In the first few years of C14 dating, a serious discrepancy was observed with samples from early Egypt, in that the C14 "ages" were too young by several hundred years, at least according to the established chronology of dynastic history.
We would simply have a date that "seemed" off by a few hundred years, and there are many, many such dates!) So it cannot be said that the effect of fire on C14 dating has been ruled out through the routine dating of charred materials.
shroud.com /c14debat.htm   (4919 words)

  
 Micheal Cranford Lou Montgomery says : +quot;[ . ] Could the Earth look old to we [sic] hu
Using C14 to date the age of the earth is every bit as silly as trying to use an electron microscope to measure the distance between the earth and the moon (i.e.
It really doesn't matter what the reliability of C14 dating is since that would not have the slightest influence on the age of the earth.
Although you have chosen to emphasize the non-constant C14 formation rates as though it were a newly discovered astounding blunder made by the scientific community, this variation was, in fact, discovered by members of the scientific community and not by creationists.
www.skepticfiles.org /evolut/datingc1.htm   (1734 words)

  
 Time Upside Down: Bristlecone Pines Tell on C14
Six C14 ages were determined from a core in an attempt to date the formation of the Bering Land Bridge.
Next the remaining dates were assumed to be contaminated by a fixed amount, after which the authors concluded that the delta under study had been formed 12,000 years ago (Hopkins, 1967, p.110-111).
In some carefully defined situations, C14 dating appears to be of value, and research must continue to determine the limits of its valid use.
www.rae.org /ch04tud.html   (1744 words)

  
 Carbon Dating
C14 dating is very accurate for wood used up to about 4,000 years ago.
So when you hear of a date of 30,000 years for a carbon date we believe it to be early after creation and only about 7,000 years old.
The methodology is quite accurate, but dendrochronology supposedly shows that the C14 dates go off because of changes in the equilibrium over time, and that the older the dates the larger the error.
www.carm.org /evo_questions/carbondating.htm   (620 words)

  
 Dating   (Site not responding. Last check: 2007-10-16)
This means of dating is most commonly used for determining the age of caves, their associated calcite deposits (stalagmite, stalactite and flowstone) and the corresponding age of archaeological materials and artefacts underlying or encased in these deposits.
Anomalous dates, seen to occur in the upper and lower portions of the flowstone are thought to be due to the effects of leaching as detailed above.
Overall, the results indicate that Uranium series dating can be useful for determining the age of flowstone deposits in the early workings, although they do not appear to be as accurate as C14 dates on charcoal or bone.
www.greatorme.freeserve.co.uk /Dating.htm   (1962 words)

  
 Radiometric dating - EvoWiki
Carbon-14 was included because it is often used to date various human artifacts; from the mathematics of radioactive decay, it is easy to see that it is useless beyond a few tens of thousands of years.
The two main types of radioactive decay used for radiometric dating are alpha and beta decay, which are both well-understood physical phenomena, and which have rates that can be calculated from the decay energies and various fundamental physical constants.
Lava flows often contain xenoliths, stray rocks from elsewhere, and dating one of those will make a lava flow seem much older than it really is. Which is because that rock had solidified long before that lava flow.
wiki.cotch.net /index.php/Radiometric_dating   (1026 words)

  
 TWD -- Radiometric Dating
Simply stated, radiometric dating is a way of determining the age of a sample of material using the decay rates of radio-active nuclides to provide a 'clock.' It relies on three basic rules, plus a couple of critical assumptions.
C14 dating serves as both an illustration of how useful radiometric dating can be, and of the pitfalls that can be found in untested assumptions.
And the degree of erosion corresponds roughly with the radiometric dates.
www.jwoolfden.com /rad_dat.html   (5908 words)

  
 The method
By measuring the C14 concentration or residual radioactivity of a sample whose age is not known, it is possible to obtain the countrate or number of decay events per gram of Carbon.
The first acid test of the new method was based upon radiocarbon dating of known age samples primarily from Egypt (the dates are shown in the diagram by the red lines, each with a ±1 standard deviation included).
Radiocarbon dates of sequential dendrochronologically aged trees primarily of US bristlecone pine and German and Irish oak have been measured over the past 10 years to produce a calendrical / radiocarbon calibration curve which now extends back over 10 000 years (more on Calibration).
www.c14dating.com /int.html   (1743 words)

  
 Scientific and Natural Laws Undermining Current Theories of Evolution: Chapter 11
These new rocks were dated using potassium-argon dating and ages of twenty million years, one hundred and sixty million years, and even three billion years were calculated.
Because C14 is so well mixed up with the C12, we expect to find that this ratio is the same if we sample a leaf from a tree, or a part of your body.
As soon as a plant or animal dies, however, the C14 atoms which decay are no longer replaced by new ones from outside, so the amount of C14 in that once-living thing gets smaller and smaller as time goes on.
www.catholic-forum.com /churches/cathteach/evolution11.htm   (2676 words)

  
 C-14 Debate from alt.turin-shroud
Translating the C14 age into a "real age" for the Shroud is not the simplest explanation in terms of the totality of evidence.
In the first few years of C14 dating, a serious discrepancy was observed with samples from early Egypt, in that the C14 "ages" were too young by several hundred years, at least according to the established chronology of dynastic history.
We would simply have a date that "seemed" off by a few hundred years, and there are many, many such dates!) So it cannot be said that the effect of fire on C14 dating has been ruled out through the routine dating of charred materials.
www.shroud.com /c14debat.htm   (4919 words)

  
 :: Radiocarbon dating
Radiocarbon dating is the technique upon which chronologies of...
Radiocarbon dating determines the concentration of 14C relative to 12C in the material analyzed, and...
That was, until the invention of radiocarbon dating.
www.maxsu.de /radiocarbon+dating   (186 words)

  
 Untitled
The principle of the carbon dating method is to compare the intensity of the radioactivity of the unknown sample with that of a modern one.
dating is ideally suited to determining the ages of artifacts a few thousand years old.
Obvious applications are the dating of bones, textiles, wood, leather, etc. Pottery and iron-work can be dated, too, because they were produced on charcoal fires; carbon from the wood that made the charcoal will have been incorporated into them.
www.physics.uoguelph.ca /summer/scor/articles/scor12.htm   (1107 words)

  
 Radiocarbon dating   (Site not responding. Last check: 2007-10-16)
A C14 date is not really a “date” at all; it is an estimation of the number of years it would take the radioactive carbon in a dead organism to decay to leave the amount of radioactive carbon actually found when a sample of that organism is analyzed.
Therefore, a C14 date of 10,000 ± 200 BP on our branch sample means there is a 68% probability (a 2 in 3 chance) the branch died sometime between 9,800 and 10,200 years ago.
Carbon 14 dating has revolutionized archaeology by providing a method for dating events and allowing the comparison of events where previously their relative ages could only be indirectly inferred.
www.flmnh.ufl.edu /natsci/vertpaleo/aucilla12_1/radio99.htm   (894 words)

  
 Infinity Program 7
An animal that died then, with a reduced amount of C14 in its bones at death, would start out with less C14 to begin with, and so when dated by the C14 method, would seem to be very old, even on the day it was buried.
When the C14 dating method is used on living mollusks, like snails, their shells seem to be as much as 2,300 years old.
Dating events in the distant past, by using an ongoing process, such as radiometric dating, is called uniformitarian dating.
www.drtruth.org /Infinity7.html   (4275 words)

  
 RADIOCARBON DATING AND SCRIPTURE
For example, wood from Ipiutak culture in Alaska, whose estimated date is AD 0-500, yielded a date of only 973 years (Science Vol 113, pg 118, Feb 1951).
While dating wood samples from a forest in Wisconsin, Dr Willard Libby wrote, "Apparently the spruce forest was submerged, pushed over, and buried under glacial drift by the last advancing ice sheet in this region." (Science Vol 113, pg 117, Feb 1951) All samples from this buried forest yielded about 11000 radiocarbon years.
Thus dating the straw would not yield the age of the straw, but rather the age of the straw 'contaminated' by the milk.
www.geocities.com /peaceharris/c14   (2261 words)

  
 A judgment about Biblical King Solomon / Evidence supports Hebrew kingdoms in biblical times
The dates of both earlier and later layers showed clearly how the successive layers of occupation could be determined from the 12th through the 9th centuries B.C., he said.
Frumkin, A., Shimron, A. and Rosenbaum, J. Radiometric dating of the Siloam Tunnel, Jerusalem.
C14 dating of grain and olive pits at Tel Rehov supports the Scriptual existance of these archaeological structures at the time of Biblical King Solomon, and dating of the Siloam tunnel confirms the Biblical time frame, if the C14 dating confirms the Scriptures it then follows that the Scriptures affirm the C14 dating methods utilized.
www.accuracyingenesis.com /solomon.html   (1569 words)

  
 Time Dilation and Carbon Dating - Forums powered by UBBThreads™   (Site not responding. Last check: 2007-10-16)
The ratio of C(12) to C(14) in the atmosphere is kept fairly constant due to the action of cosmic radiation.
C14 is created in the atmosphere by the bombardment of nitrogen 14 with cosmic rays.
Since the ratio of C14 to C12 in living material is about one part in a trillion, in just a few half lives it becomes beyond our ability to detect the existence of C14 in a carbon sample.
uplink.space.com /showflat.php?Board=sciastro&Number=318764   (1106 words)

Try your search on: Qwika (all wikis)

Factbites
  About us   |   Why use us?   |   Reviews   |   Press   |   Contact us  
Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.