Fossils symbol and mountain belts are very important for geologists in deciding where to move the continents.
Fossils and mountain belts can give the geologist ideas about the history of the certain continents and what are the animals that stayed and died in that place.
Both can also help the geologists to identify if the particular continent is a safe place to live on because the animals of a long time ago stayed on that place. So maybe the place is safe from water high tide and is not a moving plates.