This has been debunked as a real modern artifact. If that is true, then it demonstrates just how swiftly accretion can occur in the natural environment. Certainly all long dates must be treated carefully in this light. This also warns us about mine finds in particular. Just how long does it take for wood to become petrified? Or something to become fossilized?
In this case fossils are quoted and that seems unreasonable in this case. Again a careful review of providence is demanded.
In the end it appears unlikely that this is other than a recent artifact. That an expert is able to identify it as such is good news. That rapid accretion is this possible is also important and this provides a data point.