(Emma Nicholls/PA) Experts were called into the quarry when worker Gary Johnson felt ... see how the mud was deformed as the dinosaurs’ feet squelched in and out. The discovery could could ...

Emma Nicholls ... some up to nearly 600 feet in length. The 20th-century findings are also believed to contain vital information on the Middle Jurassic period. At the quarry, over 20,000 ...

Modern techniques and technology mean the prints can be recorded much more comprehensively than ever before (Emma Nicholls/PA) Experts were called into the quarry ... feet squelched in and out.