Dating news

radioisotope dating

At www.sciencedaily.com/releases/2017/01/170131104433.htm ... a paper by RB Hayes of North Carolina State University in Nuclear Technology (2017) claims there is a flaw in the radio-isotope dating technique which is used to pin down the age of rocks. The university news blurb does not give much away but it can be detrimental to uniformitarian geochronology or there would have been gnashing of teeth. It's all to do with the rate of differential mass diffusion. The calculations appear to be slightly awry.

Chauvet Pont D'arc

At http://phys.org/print379669279.html ... and http://archaeologynewsnetwork.blogspot.co.uk/2016/04/chauvet-pont-darc-c... ... we have a story about dating the cave art, a head scratching affair. The cave is situated in southern France and is a World Heritage Site. It's walls are decorated with hand prints and drawing of 14 different species of animal - and charcoal from the embers of camp fires in the cave were used to draw some of them. These include bears, horses, woolly rhinoceros, and various big cats.

Tree rings and C14

At https://malagabay.wordpress.com/2016/04/08/irish-guide-to-the-first-mill... ... purports to show that C14 dates prior to 600AD are unreliable as a result of a cosmci event. The detail is missing and one is referred to various earlier posts on revising AD chronology he has made. It would be extremely interesting if C4 diverged from the tree ring graph - even if it was not to the extent he envisages. Somebody else might like to explore the issue.

C14 found wanting

At www.scmp.com/tech/science-research/article/1856329/many-global-warming-s... ... which is the South China Morning Post, apparently read at times by Andrew - see www.bishop-hill.net/blog/2015/9/9/wrong-speed-dating.html ... and concerns a paper in Earth and Planetary Science Letters which argues C14 dating is not all it is cracked up to be. C14 dating is unreliable in context as far as global warming studies are concerned - at dates older than 30,000 years ago.

cave lion

At http://phys.org/print359878549.html ... accelerator mass spectrometry has been used by Russian biologists to date the remains of a cave lion that had been preserved in permafrost conditions. The remains included fossilised bone, claw and hair. The bones weighed in at 61,000 years ago but carbon extracted from animal hair was dated only 28,700 years ago. It is suggested the different dates arise because of contaminants in the fur of the animal. Obviously, they don't like the lower date - but why?

C14 dating oddity

Bob Porter over at the New Chronology Yahoo group has written that C14 dates from Thebes differ from those of the same period taken from Tell ed-Dab'a - by as much as a century. One theory being advanced is that delta water contains more older carbon than the Nile near Thebes (but plants are supposed to absorb C14 from the atmosphere). We seem to have something that might be explained by C14 samples being analysed at different laboratories - which would have to be explained in more detail.

pinning down the mammoths

At www.livescience.com/9771-mamm oths-alive-thought.html .... it seems mammoths may not have gone extinct in the Late Pleistocene (Younger Dryas Boundary) after all. Pockets of them may have survived in ecologically favourable areas of Alaska - and elsewhere (according to DNA extracted from frozen soil in permafrost).

The DNA of horses (that also went extinct in N America) as well as mammoth was locked in an ice and frozen soil - so how  did these herbivores survive?

different ways of dating things

An interesting development at http://phys.org/print347820987.html ... the Isthmus of Panama formed between 17 and 15 million years ago rather than 3 million years ago, according to research published in the journal Science that used a novel way of dating zircon in rocks (April 12th, see www.sciencemag.org/lookup/doi/10.1126/science.aaa2815). The new dates are roughly contemporary with the time it is thought an ice cap fetched up on the Antarctic continent.

new C14 technique

At http://archaeologynewsnetwork.blogspot.co.uk/2015/04/new-c14-dating-tech... .... we are informed archaeologists will be able to get dating results quicker and cheaper which will be a massive boon. At the moment c14 dating is so expensive only a few sample are ever properly dated - unless the archaeology budget has big money as a back-up. The new technique can also be used on site - without being sent to a laboratory (and having to wait for weeks to get the reply).

dating by foraminifera fossils

Dating,periods of time, even cycles of the ebb and flow of global temperatures, have been aided and abetted by the lowly foraminifera, or rather, the shells of tiny sea creatures (marine plankton). It was always assumed foraminifera isotopes record the temperatures above where they are found on the ocean or sea floor. They are embedded, most importantly, in Ice Age theory and the idea of 100,000 year cycles of cold climate and brief warming episodes.