Radiometric dating history

posted by | Leave a comment

Nineteenth century geologists recognized that rocks formed slowly as mountains eroded and sediments settled on the ocean floor.But they could not say just how long such processes had taken, and thus how old their fossils were.Mammals, which for 150 million years had been small, rodent-sized creatures, rapidly evolved to massive proportions in the wake of the Cretaceous-Tertiary extinction 65 million years ago.Geological timekeeping continues to be a lively science, with new methods emerging all the time.The layers of rock are known as "strata", and the study of their succession is known as "stratigraphy".

My thanks to both him and other critics for motivating me.Radioactivity also gave the history of life an absolute calendar.By measuring the atoms produced by these breakdowns inside rocks, physicists were able to estimate their ages (right).Geochronologists do not claim that radiometric dating is foolproof (no scientific method is), but it does work reliably for most samples.It is these highly consistent and reliable samples, rather than the tricky ones, that have to be falsified for "young Earth" theories to have any scientific plausibility, not to mention the need to falsify huge amounts of evidence from other techniques.

Leave a Reply

sex dating in sale creek tennessee