Fossils: Palaeoxyris (Shark Egg Case)
Age: Pennsylvanian (Upper Carboniferous)
Location: Illinois (Mazon Creek)
This is a good example of a classic fossil from Mazon Creek. Uncommon piece, the egg is still attached to a piece of plant which is very unusual.
There are both sides of the nodule The stones are unbroken, they measure about 6 x 4 cm. The egg is well preserved, it measures about 5,5 cm in length.
The fossils have been covered with a thin layer of laquer (could be removed easily with Aceton) no further manipulations!
THIS ONE IS EXETREMELY RARE!
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