This consists of alternating layers of limestone and shale , laid down as sediment on a shallow seabed early in the Jurassic period ( about 210-195 million years ago ) .
This formation consists of alternating layers of limestone and shale , laid down as sediment on a shallow seabed early in the Jurassic period ( about 210-195 million years ago ) .
Mantell 's work on the structure and life of `` Iguanodon '' began the scientific study of dinosaurs . In 1822 he was responsible for the discovery ( and the eventual identification ) of the first fossil teeth , and later much of the skeleton , of `` Iguanodon '' .