Hello,
I found this at Kalavasos formations (late Miocene 5-10 million years)
(even though not so known, pygmy elephants,hippos and other mammals were found at this area as well)
I don't know what to make of it.. there is a couple of holes at its bottom side.. I am being tempted to crack it open, if it opens, but I don't know how.
p.s. it is 30cm diameter, circular shaped with a max height of 12cm in the center.
Thanks