Sentences with phrase «radiocarbon dates of»

The scientists initially determined the rate of the LIS collapse using «radiocarbon dates of organic matter and marine shells, cosmogenic dates from the surface of boulders, and the composition of isotopes in marine sediment cores», but then the scientists also used a state - of - the art climate model to see if its results would bear out the paleoclimate data.

I slagged you off at my blog because you posted a comment at WUWT that was irrelevant and misleading: the old carbon effect in aquatic mosses has no impact on the radiocarbon dates of terrestrial mosses.

The interpretation of radiocarbon dates of charcoal material to infer fire dates requires knowledge on the long - term dynamics of old - growth lichen - spruce woodlands.

In sites with frequent fires, radiocarbon dates of charcoal approximate actual fire dates, as in dry boreal environments where fire frequency is relatively high (Filion 1984).

Radiocarbon dates of nine island fox bones suggest that the northern Channel Islands were colonized first, followed by dispersal to the southern islands.

al., reported finding stone artifacts and modified wood with radiocarbon dates of 22,500 ± 500 and 23,320 ± 1000 years B.P. from the Santa Elina rockshelter in Mato Grosso, Brazil (Gruhn 1997:29).

Radiocarbon dates of the emerging plants correspond to when the mosses were last exposed to the atmosphere and were photosynthetically active.

The authors suggest further statistical analysis of radiocarbon dates of human remains to study the mechanisms regulating population growth.

In addition to the lack of any impact craters determined to have occurred around that time anywhere in the world, the radiocarbon dates of the layer of carbon, soot, charcoal, nanodiamonds, microspherules and iridium, asserted to have been the result of this catastrophic event, vary widely before and after the megafaunal extinction, anywhere from 14,000 to 10,000 years ago.

If there is one piece of evidence that would cause me to reject and denounce my Christian faith it is that» Using radiocarbon dating of camel bones that showed signs of carrying heavy loads...»

Using radiocarbon dating of camel bones that showed signs of having carried heavy loads, Israeli archaeologists have dated the earliest domesticated camels to the end of the 10th century BCE.

«Using radiocarbon dating of camel bones that showed signs of having carried heavy loads».

«Using radiocarbon dating of camel bones» AND your positive every camel's bones that ever existed before the 10th Cent has been found and examined?

Radiocarbon dating of the dogs» bones shows they were 1,500 years older than thought, zooarchaeologist Angela Perri said April 13 at the annual meeting of the Society for American Archaeology.

For example, they have supported my application for funding to carry out radiocarbon dating of my samples.

Radiocarbon dating of the most obvious syphilis sufferer revealed that the man — probably a resident of the adjacent friary — died between 1300 and 1450, well before Columbus's birth.

And radiocarbon dating of the skeletons showed the children died around 1920 BC, roughly in accordance with the time of the legend.

But according to radiocarbon dating of burnt wood bits found in the plaster and from surrounding strata, it is by far the oldest known Mayan writing — dating from between 300 and 200 B.C., which is roughly concurrent with the earliest writings of other Mesoamerican cultures.

The radiocarbon dating of the DNA tooth enamel yielded a maximum age for Naia of 12,900 years ago, while UNM's uranium - thorium results provided a minimum age of 12,000 years ago, confirming that Naia was a Paleoamerican.

Radiocarbon dating of marine shells and burned twigs at the site shows that humans first landed on San Miguel at least 12,000 years ago, and the dart head in my hand holds clues to the ancestry of those seafarers.

Timeframes are identified through radiocarbon dating of freshwater snail shells and other organic soil matter.

Radiocarbon dating of the 15 Siberian tusks showed they span the period from about 40,000 years ago to about 10,000 years ago.

Radiocarbon dating of the charcoal samples provided an age for the shells; measurements of oxygen isotopes found in the clam fossils gave sea surface temperatures every 2 to 4 weeks during the clam's life.

Using radiocarbon dating of organic material found nearby, Spriggs and Wickler fixed the age of the tools at 28 000 years (Antiquity, vol 66, p 898).

Radiocarbon dating of charcoal found with the earliest of the stones pegged the corn as 8700 years old, bearing out the genetic dating by Doebley's group.

Radiocarbon dating of minute leaf and wood fragments preserved in the cave's ice indicates that its glacier is at least 10,500 years old, making it the oldest cave glacier in the world and one of the oldest glaciers on Earth outside the polar regions.

Archaeologists have long known that farming arose in the Middle East and then spread to Europe, because radiocarbon dating of hundreds of early sites shows a clear time gradient from east to west.

In addition to CT scanning of bones and teeth and radiocarbon dating of previously excavated materials, researchers hope to launch new archaeological digs, possibly in Europe or the Near East.

Radiocarbon dating of a fossilized leg bone from a Jamaican monkey called Xenothrix mcgregori suggests it may be the one of the most recent primate species anywhere in the world to become extinct, and it may solve a long - standing mystery about the cause of its demise.

The researchers thus applied a variety of standard and cutting - edge techniques to analyze both the bones and their ancient DNA and proteins, and undertook radiocarbon dating of the samples.

Moreover, radiocarbon dating of microfossils in the sediments inside the pockmarks is consistent with the ages derived from the carbonates.

Recent sediment remolding on a deep shelf, Ross Sea: implications for radiocarbon dating of Antarctic marine sediments.

Radiocarbon dating of surface marine sediments, Ross Sea, Antarctica: Problems and Solutions.

Revised age of late Neanderthal occupation and the end of the Middle Paleolithic in the northern Caucasus «Advances in direct radiocarbon dating of Neanderthal and anatomically modern human (AMH) fossils and the development of archaeostratigraphic chronologies now allow refined regional models for Neanderthal — AMH coexistence.

Radiocarbon dating of seized ivory confirms rapid decline in.

Techniques include tree rings in timbers, radiocarbon dating of wood or bones, and trapped - charge dating methods such as thermoluminescence dating of glazed ceramics.

From radiocarbon dating of archaeological finds to monitoring nuclear waste disposal.

Bone Diagenesis and Radiocarbon Dating of Fish Bones at the Shag River Mouth Site, New Zealand

The first acid test of the new method was based upon radiocarbon dating of known age samples

The stable form of carbon is carbon 12 In this article, an overview is presented of the status of the radiocarbon dating of iron - based materials.

shallow seismic stratigraphy and radiocarbon dating of planktonic foraminifera.

Bone Diagenesis and Radiocarbon Dating of Fish Bones at the Shag River Mouth Site, New Zealand Carbon - 14, 14 C, or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

Radiocarbon dating of the basal sediments shows that this carbon.

Though they may know it as carbon dating or carbon 14 In this article, an overview is presented of the status of the radiocarbon dating of iron - based materials.

[38][39] Similarly, radiocarbon dating of American east coastal subfossil remains confirm that gray whales existed there at least through the 17th century.

[37] Radiocarbon dating of subfossil or fossil European (Belgium, the Netherlands, Sweden, the United Kingdom) coastal remains confirms this, with whaling the possible cause.

The most recent radiocarbon date of approximately 1000 A.D. comes from this context and nearly marks the abandonment of the site.

From 1275 to 1300 A.D., glaciers began expanding more broadly, according to radiocarbon dating of plants -LSB-...]

The following methods were used to date the last fire and sometimes the previous fire occurring at a site: dating of fire scars, dating of post-fire trees, dating of pre-fire trees, radiocarbon dating of charcoal and clonometry.

Thus, it is not readily apparent that a given radiocarbon date of charcoal corresponds to the approximate date of the last fire occurring at the site.