All language subtitles for 14 you tube Mathieu Duval - interview Q4 [360p]

when the fossil is buried and so surrounded by

by sediment

uranium will migrate into this fossil

the uranium will naturally decay into other elements

daughters that's how they called

and so uranium decays in another element

which is the thorium

and if you measure the amount of thorium in your sample

on the amount of uranium

you can know

for how long the uranium actually entered the faucet

so that's the basic principle of uranium series dating

so what we date here

it's not the death of the animal

what we date here it's

the moment when uranium entered as a fossil

and this moment can actually be much later

after the death of the animal

so which is why we always consider

uranium series ages of fossil bones

as a minimum ages for the fossil

the strength of your name series dating is that it's a

pre size dating method

you only need the sample to produce an age

which mean that if your sample was taken out of context

if you don't know where it's coming from

you can still get an age

so it's still useful

the problem with this method is that as I said

it's it's a minimum

it gives you a minimum age

so you know that the somebody's at least

10,000 years old

but it could be much older

so it gives you a minimum chronological constrain

for the faucet