On a crag of rock called Brother's Point on Scotland's Isle of Skye, scientists have identified two bustling footprint sites that reveal an abundance of dinosaurs that thrived 170 million years ago including an early member of a celebrated group.

Researchers on Wednesday said about 50 fossilized footprints making up several trackways were found at the two sites located a few hundred yards (meters) apart on the scenic promontory that juts into the chilly North Atlantic.

At least three types of dinosaurs left the footprints that amount to a dinosaur parade ground — remnants of a muddy surface on the edge of a brackish lagoon. The tracks date from a time in the middle of the Jurassic Period represented by very few dinosaur fossil discoveries worldwide.