Some dates are assigned based on what fossils are found. See Index Fossils.
USGS Examples of Index Fossils used to date rocks
"I've provided you with lots of links on dating methods on prior threads -- did you not bother to read them? "
I usually don't read your posts. I almost ignored this one when I saw it was you. If you ever learn to be concise and to the point, I might give you a few moments consideration.
Some dates are assigned based on what fossils are found. See Index Fossils.
*Identification* of a strata can be done by index fossils. *Assigning dates* to it is done by other methods.
["I've provided you with lots of links on dating methods on prior threads -- did you not bother to read them? "]
I usually don't read your posts. I almost ignored this one when I saw it was you.
"A closed mind gathers no thought".
If you ever learn to be concise and to the point,
I am. It's just that complex issues require more than a bumper-sticker worth of exposition if you want to actually understand them correctly.
I might give you a few moments consideration.
Need I point out just how little of value can actually be learned in "a few moments" of attention? But thanks for the confession, it helps me better understand why your posts are the way they are.
With the possible exception of Dataman, I can't think of anyone who's learned less on these threads here despite a bombardment of attempted corrections.