As a result of the displacement of the continental plates, Olympus is still pushed up by one to four millimeters per year. This is the reason why there are petrified marine animals at a height of around 1000 to 1500 meters. A hitherto unique find was an ammonite found at an altitude of about 1100 meters. Other witnesses who were part of the mountain formerly under the sea level are limestones that were drilled by mussels (Litophagae) or limestones include petrified sea-worms.