Here is a quite rare Cystoid from the Llanvirn of the Barrandian area of the Czech Republic. The pice does come with the negative and positive side as well. | |||
Location: | Rokycany Osek, Barrandian area, Czech Republic | ||
Size Matrix : | about 37 x 32 mm | ||
Age: | Middle Ordovician, Llandeilo, Šárka Formation (About 464 mill. Years old) |