The ammonite is an extinct marine animal with a spiral-form shell.
The petrified wood is fossilized over many years. There is a chemical change which makes the wood turn to stone.
date: 100-200 million years old.
maximum dimension: Ammonite: 85mm Petrified wood: 145mm length
subject area: Social Science, Science, Maths
subject themes: Fossils, Geology, Minerals
handling collection number: HC192
http://www.discoveringfossils.co.uk/ammonites.htm |