Radiocarbon dating the
Chronological sequence is all that is really required.
However, human beings love to see factual precision, and we want to know how old something is.
When granite rock hardens, it freezes radioactive elements in place.Building stone, known as ‘Hornton Stone’, has been quarried there since medieval times.Figure 3(b) Closer view of the quarry face of the south wall showing the oxidized limestone of the top of the Marlstone Rock Bed which is quarried as ‘Hornton Brown’ building stone. During two visits to the Hornton Quarries, it was established that fossil wood occurs alongside ammonite and belemnite index fossils (see aside below) in the ‘Hornton Stone’, the oxidized silty top of the Marlstone Rock Bed.Researchers have been delving into the history of the royal menagerie, using animal remains to reveal the secrets of medieval lions once locked up in the Tower.Scientists say big cat skulls found in a moat that protected the fortified palace provide clues to when and how these lions were kept.