There are five different types of fossila [table] Terms | Definitions ; Moid (imprint) fossils Cast fossils Fossil fuels Actual Remains Petrified wood | When a leaf, feather, bone or even a body of an organism leaves an imprint on sediment, which hardens and becomes rock When minerals fill in the hollows of an animal track, a mollusc shell or another part of an organism Fuels formed by the remains of dead plants and animals The body of an organism, with all the parts intact. Usually preserved in ice, amber or tar When minerals replace wood or stone to create either petrified wood or a mineralized fossil [/table]