Grun, a geochronologist
at Griffith University in Australia, analysed tiny samples of rock retrieved from the two fossils.
Funded by grants from the UP and foreign donors, Mijares carried out the archaeological study along with Florent Detroit of the National Museum of Natural History in Paris, Australian zooarchaeologist Philip Piper and geochronologist
Along with Potts, the lead authors of these papers are Alan Deino, a geochronologist
at the University of California at Berkeley, and paleoanthropologist Alison Brooks of George Washington University.
Questions remain about the age of the oldest Warratyi discoveries, says geochronologist
Richard Roberts of the University of Wollongong in Australia.
This was joined to over 75 optically stimulated luminescence dates by project geochronologist
Zenobia Jacobs at the University of Wollongong (Australia), creating the highest resolution stone-age sequence from this time span.
Stony and silent, fossil corals can tell tales--if coaxed skillfully by a geochronologist
like Bill Thompson at Woods Hole Oceanographic Institution.
Dating megatauna-bearing sediments from 28 sites across Australia, scientists led by Roberts, a geochronologist
at the University of Melbourne, and Flannery, a mammalogist at the South Australian Museum in Adelaide, found that a continent-wide extinction of large animals took place about 46,000 years ago-not many millenniums after humans appeared on the Australian scene.
"They both happened at effectively the same time, which is why we think there's a causal link between them," says study coauthor Paul Renne, a geochronologist
at the Berkeley Geochronology Center in California.
"This was the last time that climate was as warm as-or warmer than-today," said WHOI geochronologist
Resolving this issue required precisely dating both the volcanic eruptions and the extinction itself, says Seth Burgess, a geochronologist
at the U.S.
According to a report by ABC Science, the Australian and Swedish researchers, led by geochronologist
Dr Chris Kirkland, from the Western Australian Department of Mines and Petroleum, have found evidence from sandstones in the Morfneso Formation in North Greenland, which confirms the presence of oceans on the early Earth.
Rising temperatures from climate change will worsen future droughts, warns study coauthor Kevin Anchukaitis, a geochronologist
at the Woods Hole Oceanographic Institution in Massachusetts.