Where igneous rocks are absent, a fossil's "age" is determined by comparing the fossils of one location to those of another, and then comparing those comparisons to charts in books with age assignments provided on the pages.
But in standard studies, no age assignment is ever accepted unless it conforms to the "millions of years" doctrine of evolutionary earth history.
Three geologists have reported what they called the first "successful" direct dating of dinosaur bone.
Will this new radioisotope dating (or radiodating) technique solve the problems that plagued older dating methods?
If history is anything to go by, then the answer is no.
This evidence has indicated that radioisotopes have not decayed at a constant rate, and therefore the radiodating "clocks" in general are all broken.Their new technique involved first polishing a slice of bone and then shooting a laser beam onto its surface.The laser dislodged radioisotopes and other relevant isotopes, which were detected and counted.They then used these measurements to estimate an age for the bone.But radiodating cannot proceed without some primary assumptions: the starting conditions of a given sample (e.g., how much of each isotope was present in the beginning), a steady rate of decay of certain radioactive isotopes of elements called radioisotopes, and a lack of tampering with the system (e.g., elements added or subtracted since the radioisotope "clock" first began counting time).The findings are now documented in a recent issue of Nature.The dating results document that these samples are as old as we thought they should be, agree Maria Teschler-Nicola from the Natural History Museum in Vienna and Erik Trinkaus from the Washington University in St. This is an informational tour in which students gain a basic understanding of geologic time, the evidence for events in Earth’s history, relative and absolute dating techniques, and the significance of the Geologic Time Scale.The human fossil evidence from the Mladeč Caves in Moravia, Czech Republic, excavated more than 100 years ago, has been proven for the first time, through modern radiocarbon dating, to be the oldest cranial, dental and postcranial assemblage of early modern humans in Europe.Louis, the two anthropologists involved in this study.The Mladeč samples date to around 31,000 years ago, reports Eva Maria Wild from the VERA (Vienna Environmental Research Accelerator) Laboratory at University of Vienna, where the radiocarbon dating has been performed.