A Canadian research team has used a new uranium-lead (U-Pb) dating technique to show that a fossilised dinosaur bone found in New Mexico is only 64.8 million years old, meaning the creature was alive about 700,000 years after the mass extinction event that is believed to have wiped out all non-avian dinosaurs.
A team led by Larry Heaman of the University of Alberta's Department of Earth and Atmospheric Sciences used the method to determine the age of the fossilised femur of a sauropod, a herbivorous dinosaur.
As a member, you'll also get unlimited access to over 55,000 lessons in math, English, science, history, and more.
So, we rely on radiometric dating to calculate their ages. Because of this decay, the helium content of any mineral or rock capable of retaining helium will increase during the lifetime of that mineral or rock, and the ratio of helium to its radioactive progenitors then becomes a measure of , helium dating provided most of the dates used in the early geologic time scales.Helium ages, however, tend to be too low because the gas escapes from the rock.THANK YOU SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO MUCH!!!!!!! I FINALLY UNDERSTOOD THIS BECAUSE OF THIS WEBSITE!!!THANKS AGAIN AND I HOPE THE DEVELOPERS MAKE MORE WEBSITES ABOUT SCIENCE TO HELP ME OUT!!This chain eventually ends with the formation of a stable, nonradioactive daughter nuclide.