Iv got a couple ideas but cant put my finger right on it, i know youll know!

[RealEyezd]

Found these, near "Copper" /applegate dam in Oregon, cant wait to hear what you say they are!

 

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[GoldieLocks]

I wan an Oregonian for many years. I suspect it is just natural granite that you have. Or maybe chromite...see https://www.oregongeology.org › ...PDF
Chromite in southwestern Oregon - Oregon Department of Geology ...

 

[ToddsPoint]

Granite doesn't rust. It's something with some iron in it. Gary

 

[creskol]

Granite doesn't rust. It's something with some iron in it. Gary

Is it rust or stain?

 

[Gambrinus]

That could be Granodiorite with magnetite that has oxidized, giving it the rust color... Maybe.

https://en.wikipedia.org/wiki/Granodiorite

https://www.google.com/search?q=gra...V6FjQIHbFADbcQ_AUoAXoECDEQAw&biw=1348&bih=626