We know from the abundance of fossils that have been recovered that there was much prehistoric life in the area surrounding what is now St Ives. Many of these finds are available for inspection in the Norris Museum. Judging by the quantity of marine animals the district was for much of the time covered by a shallow sea.
Over thousands of years the sea slowly silted up and became even shallower, with areas of dry ground standing clear of the waters. The fauna also slowly changed but not to animals that we would expect so see today. The climate was much warmer than it is now and was ideal for the large mammals such as Elephants, Rhinoceros and Hippopotamus.