Oh and as far as where it came from... heh
That could have dislodged and bumped along bottom for a day... a week... a month... a year OR floated in from anywhere.... sheesh even cuba for all ya know.
Just because something washes ashore ... does not mean it originated anywhere near there...
We are talking about WOOD... not metals.
The idea that it came from anywhere near the spot it beached is novice in thinking.
I can tell you this much without ANY thought about it at all... It came from the south.
So IF you wanna gonna looking for the "rest" of it...
Start there and work south.