Fossils Holding a 10 or 100 million years ago fossil in your hand is a getaway to the past and a unique emotion... Ammonites, nautilus, petrified wood and shells have a higher quality than other countries'fossils because of their extraordinary state of conservation. Place of origin: Ambondromamy - petrified fossil wood; Akondromena,Bekoratsaka and Tulear - ammonites.