of Paris, empty spread dish, vaseline, leaf.
Smear leaf and dish
with Vaseline. Place the leaf in the middle of the dish. Mix Plaster of
Paris and pour over leaf. Wait 10 minutes. Turn out.
Real fossils are made
in a few different ways. This method simulates what is known as the “Moulds
or casts” where a shell embedded in a rock may be dissolved by ground
water and leave a cavity preserving the shape of the shell. This is a natural
external mould or imprint of the shell’s exterior.