Hi,
While out fossil hunting with my girlfriend in the Navesink Formation at Big Brook in Colts Neck, NJ, she found this small bone fragment while sifting. It measures about 2 7/8 inches (approx 73 mm) and weights 8.1 grams (but still may contain packed dirt on the inside). It is slightly thicker than a half inch in thickness while laying down.
I have no idea what the bone belonged to, and I highly doubt anyone will be able to have much of a certain identification for this, but I promised I'd take a look and see what the Fossil Forum thinks. I can give more measurements and images if needed.
Thanks,
Aiden