Your stone is special.
Pages of history in it.
Records of weather events and conditions.
Hydraulics of the creek fluctuations. Rain , storms ,who knows what else?
Times of deposits the creek carried or scrubbed along.
A study of it and the area will tell more. If you find a layer of it , you'll have more to study.
If it is a one off , find it's source...
My area , three foot depth along a river I found a relic in where the bank eroded only goes back to the early nineties. Spring flooding carries lots of sediments. Far into the woods too!
Your creek will be different. But how is up to you to sort out.