[pierrem15]

I was wondering about that. But if the river bottom was scoured by higher flow once in while, then the heavy metal objects would accumulate in piles.

It's also possible hat the photo was taken after a water jet was used to excavate.

In any case, the items found are amazing, including the bronze head of a horse cut from a sculpture.

[dljordan]

“It’s also possible hat the photo was taken after a water jet was used to excavate.”

I don’t think those plants would be there if they were using a water jet.