112m-year-old dinosaur tracks damaged in Utah by construction machinery

Damage evaluated as minor, but fractures to the rims of several prints cannot be repaired at the Mill Canyon track site

They survived intact for 112m years through scorching summer heat and freezing winters at Utah's Mill Canyon. But several of the world's most important and historic dinosaur footprints were damaged beyond repair earlier this year when a construction crew arrived to build a new boardwalk for tourists.

The extent of the harm to the footprints - and those of an ancient crocodile crossing in the canyon near Moab - was detailed in a Bureau of Land Management (BLM) report into the January incident published last week.